| Main Index New Window Search Register Login Who's Online No Encryption FAQ Links Logout | ||||
| 29 Online, 4811 Registered | You are not logged in | |||
|
| Methods Discourse | Thread: Previous Forum index Next | ||
| Post 25 of 40 | Subject: Post deleted by LaBTop | Thread closed Thread kept | Page: Previous First All Last Next | ||
| LaBTop (Stranger) 07-12-00 12:42 No 23325 |
Detailed Methods for Non-chemists Edit: IT'sDONE! | |||||||
DETAILED METHODS for NON-CHEMISTS ============================ LIST of SYNTHESIS (red list-text = method new/altered) : I.------Sassafras rootbark -or- (chemical synthesis)--> SAFROLE. II.-----SAFROLE--> IsoSAFROLE--> MDP2P ketone--> MDMA , MDA, MDEA. III.----Lowpressure Catalitic Reduction--> P2P ketone--> METHAMPHETAMINE, (METH, ICE). IVa.----2,5-Dimethoxybenzaldehyde + PTC (PhaseTransferCatalist)--> Nitrostyrene--> 2C-H (2,5-DMPEA , 2,5-dimethoxyphenethylamine)--> 2C-B and many more highly interesting unexplored 2C-(X) analogs, -or- IVb.----MESCALINE--> MESCALINE Nitrostyrene--> 2C-H--> 2C-B etc. V.------2C-B a la Lycaeum. VI.-----AMPHETAMINE PRECURSORS CLEANING/WORKUP.( The Cure) VII.----EPHEDRINE to METHAMPHETAMINE + RP/I2. VIII.---SIMPLE HCl GASSING/BUBBLING APPARATUS. IX.-----NITROMETHANE --> MDMA. X.------FORMALINE + NH4CL --> METHYLAMINE.HCL XI.-----DMF O2 WACKER. XII.----MDP2P + NMF --> MDA ( Leuckart big scale) XIII.---Bright Star's MDMA synthese. XIV.----Rhodium's SAFROLE to ISOSAFROLE routes. XV.-----LaBTop's d- and l-isomerisation procedures ---------------------------------------- METHODS : I.------Basic-Extraction -or- Supercritical-Extraction--> Steam-Destillation. II.-----Fractional destillation--> Aliquatt336+KOH (a la Osmium)--> Classic Performic (a la Ritter)--> Al/Hg (a la Osmium) -or- NaBH4 reductive amination (a la LaBTop) -or- lowpressure reduction (a la KrZ). III.----Lowpressure hydrogenation (a la KrZ)--> Destillation--> Reductive Amination NaBH4 (a la LaBTop) -or- low pressure technique (a la KrZ). IVa.----Addition + PhaseTransferCatalist (a la Rhodium and Beaker)--> Lowpressure Catalitic Nitrostyrene Reduction (a la KrZ) or Beaker's synthesis--> --> Addition (a la Shulgin). Or 2C-B synthese a la Lycaeum, -or- IVb.----Supercritical-extraction -or- (chemical synthesis)--> Nitrostyrene synthesis (a la Rhodium)--> Electrochemical Reduction (a la Uncle Fester)--> Addition (a la Shulgin). V.------2C-B a la Lycaeum.(Andrew Edmond) VI.-----AMPHETAMINE PRECURSORS CLEANING/WORKUP : The Cure (Placebo) VII.----EPHEDRINE to METHAMPHETAMINE + RP/I2. (Placebo) VIII.---SIMPLE HCl GASSING/BUBBLING APPARATUS. (Psychokitty) IX.-----NITROMETHANE --> MDMA.(Methyl Man) X.------FORMALINE + NH4CL --> METHYLAMINE.HCL. (Vogel) XI.-----DMF O2 WACKER. (Strike, KrZ, Grouch) XII.----MDP2P + NMF --> MDA. ( Leuckart small/big scale, LT/) XIII.---Bright Star's MDMA synthese. XIV.----Rhodium's SAFROLE to ISOSAFROLE routes. XV.-----LaBTop's d- and l-isomerisation procedures **And anything else found economical interesting for the creative home brewer** ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ METHODS merits : First of all : Dr. Alexander Shulgin : No need for words, the greatest ! Paul Nels Rylander : for his extensive work on practical hydrogenation techniques. Hat off ! Strike : For creating this place, and giving a wealth of information in her books. A big hug ! (Still did not received your books, how come?). Eleusis : For starting a really interesting discussion in the early days of this board, ultimately costing him his freedom. The Lycaeum : For sheltering this place for so long allready, against mainstream US policy, and not interfering with our freedom of speach. Rhodium, for collecting all that priceless information on his website, the best there is for the underground chemist or cook. Secondly: Overall methods : Rhodium, Osmium, Rev drone, Labrat, Cesium, Spiceboy, Ritter, Beagle boy, KCN, Station, Sunlight, Sumerian, Gyrogearloose, iudexk, Ymir, Methyl Man, Psychokitty, Chem_Guy, Bankrobber(and some more, fill them in later). Hydrogenation : KrZ (mainly !), Rylander, pHas3d, Titanium, Equarius (and some more, I fill them in later). Electrochemical Reduction : Uncle Fester (mainly !), Dwarfer, Worlock, WizardX etc. O2 Wackers : KrZ, Strike, Bright Star, Grouch, and more will follow ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ======================================== SAFROLE: Materials : Same as for IsoSafrole. Chemicals: 16-18 L non purified safrole oil 70-90% pure. 20 L industrial Silicone oil or Peanut oil for oil-heatingbath. ++++++++++++++++++++++++++++++++++++++++ Method : S1. - First you have to clean your safrole oil by fractional distillation. S2. - This means that you separate different fractions of your impure reagens fluid (safrole here), those fractions will have different boiling points. That way you split the impurities from your desired oil. S3. -You start heating up your impure Safrole and let it first come to a steady constant boil at the first temp where this will happen, under your vacuum, reached by your vacuum pump; keep the temp at that point until no more fluid comes over in the collecting flask, put that aside after releasing the vacuum, put the cleaned/dried collecting flask on again, and put vacuum on again, and then slowly incline the temp until boiling starts again, repeat as many times that you reach different boiling temps (at least 5 C apart from eachother). S4. - You will at a certain temp (here ~ 130-145 C , depends on the strength of your vacuum), get the biggest fraction, which is safrole, and the other fractions will be only very small. These other fractions can be used ~ 5x again in next batches (see below at S8.). S5. - If you use a 22 Liter 3-neck flask for it, and you don't have a big magnetic stirrer, you must use boiling chips in it, about 1 % oil-volume procent, so for a ~3/4 filling = ~16-18 liter filling (never use more then ~3/4, or fluid, not vapour, will boil into your condenser) you need 160-180 ml chips roughly (~). S6. - Measure them in a measured beaker in ml volumes, don't worry about the loose spaces between them. S7. - If you use a magnetic stirrer bar ( MUCH better!) and an aluminium pan as an oilbath, filled with peanut- or silicone oil, so you can use the stirrer, because the pan is from aluminium ( stirring strong and big enough), then there is no need for boiling chips, they would even damage the flask in one run. They would work as a grinding machine on the innerside of the glass flask, together with the big magnetic stirbar; or if you use a overhead stirrer, like a variable speed drill, or a non-sparking induction electro-motor; together with the stirrer propellor. S8. - Any for-or after-run(s) at a temp more then 5 degrees C different from your main safrole body, you must throw back in the next 16-18 L safrole batch you start up after some day(s). After 5x doing this, you throw both away, it's more rubbish then safrole by then. You re-use these fractions 5x because they allways will still contain some pure safrole oil. S9. - Pure safrole oil is light yellow and smells a bit sharper sweet then the ketone, MDP2P (MethyleneDioxyPhenyl-2-Propanone), which has a much softer sweeter smell and is a bit more yellow then the pure safrole; if you work perfect, the pure safrole and the pure ketone will have no color at all, and the ketone will be a bit more syruppy (thicker) then the safrole. S10. - Safrole can be fractionally distilled at ~130-140 C temp using a new refridgerator pump(as your vac source, 1/8 horsepower, buy them from a fridge repair shop, $120) or a normal oil-filled vacuum-pump or much better: use allways a diafragm-vacuumpump, no oil which can and will be contaminated every time you use a oil filled pump, so it looses its vacuum-power; and standard glass distillation setup with a 40-60 cm icewater cooled fractionating/reflux-condenser and using a 22 L roundbottom flask hanging in an oilbath filled with peanut oil or better silicone oil as an egally heating source, and a big collecting flask. S11. - Under the aluminium oilbath you would use a magnetic stirrer/heating plate with enough electrical power/watt's. Don't let the 22 L flask touch the bottom of the aluminium pan, keep it ~1 cm above the bottom, to prevent extreme hot-spots which could decompose your safrole or ketone. S12. - Grounded standard glass-connections/fittings should allways be used on your distilling glassware. S13. - Cold circulating water for the condenser comes via 2 tubes (one hanging loose at the water level in the icewater bucket) from an aquarium water-pump (expensive ones 70-80 dollars, cheap ones 10-20 dollars), submersed in a styrofoam isolated bucket or drum filled with ice cubes in water, which you re-new from time to time. S14. - Distillation generally takes 4-5 hours depending on size, and heat applied. Always a good idea to insulate the fractionating column, and 22 L flask-neck with the condenser/refluxer on it; with heavy duty aluminum foil. Just wrap it around all the glass parts. Make ~1 cm2 holes, 5 cm apart from each other, in the aluminium wrapping then, to see what happens inside the glass parts. S15. - The main safrole oil body (ca. 15.5-17.2 L), which boils (at~ ~130 C) and comes over at your vacuum ( should be 20 mbar or lower), you collect to proceed to make: ======================================== ISOSAFROLE (Aliquatt336/KOH method) : Materials : 1--Magnetic stirrer/heating combi plate + minimal 1 big magnetic eggshaped stirrerbar, to use in roundbottom flasks, and 1 straight one, for flatbottom flasks. or: 1--Kg boiling chips. (Pumis-stones, crushed raw flowerpot pieces, crushed raw porcelaine, cat-litter). and : 1--22 L round-bottom, 3-neck, glass vacuum-flask with 3 standard grounded neck- fittings. 1--portion High-vacuum silicone-grease (Merck f.e.), to thinly grease all grounded glass-fittings, allways both male and female grounds. 1--Still head, to connect one of the grounded necks of the 22 L flask to the grounded inlet of the condenser. 1--40 to 60 cm glass condenser, preferably the one you see with ~ 8-12 glassballs blown inside ( for use as reflux condenser). 1--big enough (min. 5-10 liter) collecting glass-flask with standard grounded fitting. 1--Vacuum glass-alonge with male and female standard grounded fittings and vacuum-tube fitting. 1--Vacuum tubing, 3 meter long, shorten it to the minimal length from alonge to pump, must fit tight on the alonge and the vacuum pump. The shorter, the better the vacuum. The remaining part you use for your aspirator vacuum, you will use it for volatile solvents removal/recovery. 1--Water driven PTF, Nylon or PVC vacuum aspirator, connected to a water tap with sufficient pressure and cold enough water, to use in case of electrical power failure and for evaporating low boiling vapours, f.e. methanol, acetone, dichloromethane etc. Never use an oil-filled vacuumpump to do that. A diafragmpump can do it, but why should you take the risk of damage to your expensive pump, when you can use a $40 aspirator for simple solvents evaporation ? 1--Big thinwalled flatbottomed aluminium pan, to fit the 22 L flask in. Buy it at a chinese restaurants supplier-shop. 2--Glass or digital thermometers, -30 to+300 C, one to use in oilbath or icebath and one in the flask-neck, long enough to reach the fluid inside. The best would be to have another one with small grounded glassfitting in a 2-neck Claisen type still-head setup between the 22 L flask and the condenser, to measure vapour temps. This is not directly necessairy, but is handy to see if the vapour temp suddenly varies, that means you have to put vacuum off and collect that last fraction, because the next fraction is coming. 1--10 L jerrycan with peanut oil or better silicone oil (the big oil-company brands suppliers have it, such as Exxon, Shell, Mobil). 4--Big lab-stands with 8 lab-clamps to rig up your distillation setup. 1--Big bucket or drum, isolated with styrofoam or insulation blankets used in building industry, to use as ice-water circulating tank for the reflux/condenser. 1--Aquarium or fish-pond water-submersable circulation pump in that bucket or tank.. 1--5 meter long water tubing, cut in half to fit the condenser and the watertap or circulating pump. 1--Multiple (6) electrical connections box with main ON/OFF switch. Panic : all electricity OFF. 1--Fire-extinguiser, for those unlucky moments. CO2 or special chemical-gas filled one. Better not a powder filled one, you will find out why, when you have to clean that stuff. 1--Drying oven, up to 350 C. old household-one sufficient enough, preferable electric. Gas burning type gives off water vapour and an open flame is not safe in a lab environment. 1--10 L filter flask, heavy walled, with vacuum side-adapter fitting. With some creativity you can use a big thickwalled glass Chianty wine bottle with a 2 hole stopper, one hole for the Buchnerfilter and one for the vacuum. 1--5 Liter (~) PTF or PP or PE or PVC or porcelaine or glass Buchnerfunnel. 1--Set of commercially sold rubber V-shaped rubbers in different sizes, for Buchner and to fit in mouth of filterflask. 1--Pack of round filterpapers, to fit nearly exact in the Buchner filter funnel. Attach the filterflask fitting to the tapwater-aspirator-vacuum pump for a safe vacuum. 1--~20 L clear plastic carboy used in drinking water utilities : ( to use as a self constructed separator-funnel : cut a 5 cm hole in the center of the bottom to use as filling opening, which you can close later with a 5 cm rubber stopper, so must be nice round, and push firmly a big rubber stopper with a center hole, in the excisting mouth at the top of the carboy. Fix the stopper with iron wire, so it can never plop out, or safer, use any clamp which fits the mouth of the carboy and covers the stopper ~half. Push a tight fitting glasspipe, with a glass-valve attached to it with a small piece of silicone-tubing which tubing you strap with those nylon straps used in car-repairshops, into the stopper, not extending above the other end of the stopper. Voila !) 4--25-30 Liter PTF or PPP or PE plastic jerrycans, cleaned and dried. 1--Box of heavy duty Reynolds wrapping aluminium . 1--Big steady lab table with a vinyl, or the like, coating. 2--Comfortable chairs, to sit in during those long waiting hours. 1--Small TV with antenna. Less entertainment-greedy persons can help themselfs with a ghettoblaster radio/tape-recorder/CD-player. 1--Pile of Playboy's, Hustler etc. or a big vibrator, also very handy to separate layers in your home-made separator funnel ! Just keep it tight against it. Must be ON then. It vibrates the oil out of the fluids ! Chemicals: 15.5-17.2 L purified safrole oil >98% pure. 5.611 kg KOH flakes (~98%, industrial grade). 1 kg Aliquatt336 (Methyl-tri-octyl-ammonium-chloride) ~>98% pure, from Merck or Fisher etc. 3 kg Florisil (=magnesium silicate=CAS 1343-88-0 )~>98% pure. 5 L DiChlorMethane ~>98% pure. 1 kg pack of silicagel beads 2-5 mm from Merck, Fisher etc.; or 1 kg MgSO4.7H2O industrial grade. 5 L Silicone oil from Shell, Exxon etc. Tapwater (H2O) from your government, and lots of ice cubes or blocks . ++++++++++++++++++++++++++++++++++++++++ Method : I1. - If you have any doubt that your now pure Safrole oil is not dry, so has some water in it, first dry it by shaking or mixing in your 22 L flask (or a suitable 20 L jerrycan) with a stopper in all necks at least 1 hour with 5% weight/weight silicagel beads or MgSO4.7H2O which are both first dried in an oven for 3 hours at 250 C. Then decant(in case of silicagel) or filter the MgSO4 off and proceed as soon as possible. Your oil MUST BE DRY ! I2. - If you must filter MgSO4 off, then use the big Buchner filter with a round filter paper in it, pre-wet the paper with some oil, push all airbubbles away formed under it, and carefully decant your oil/MgSO4 mix in the middle of your filterpaper, better use a big spoon laying in the middle of your paper to pour slowly in, so you don't disturb the fixation of the filterpaper, until at least a 2 cm layer is reached, now put your aspirator vacuum on, attached to the 10 L vacuumflask, take the spoon out, then you can proceed somewhat faster decanting while the vacuum sucks much faster then mother earth's G-force. The MgSO4 stays behind on the filterpaper. Don't leave any MgSO4 in the container, swirl from the beginning to have it good mixed with the fluid. Otherwise you have a truckload of MgSO4 left in the container, wetted with Safrole, and how do you get that out then ? I3. - Pour 10 kgmoles safrole oil ( ~16.219 kg) in an open 22 L flask, only a thermometer immersed in the fluid, add carefully 12 kgmoles KOH flakes (~5.611 kg) via a widemouth plastic funnel (the solution will immediately turn black.brown): crush the KOH to not too small particles, ~1-2 cm, first, f.e. in a thickwalled plastic bag with a big hammer, ONLY if they are really big. Normally you don't need to do this! Don't get carried away by your enthousiasm and slam it, just push, be carefull, KOH in your eyes is not pleasant at all. Don't crush it too small, you must be able to decant or filter the oil later easily. I4. - Stir for 10 minutes with the magnetic stirrbar or overhead stirrer , the solution will warm up allready caused by some exothermic effect, nearly no KOH will dissolve, which is no problem at all and is normal. That's why there may be NO water in this stage of the reaction ! Or the KOH will dilute in the water and can not be filtered off later, and more washing steps are then needed. I5. - Keep stirring and add 5 kgmol% pure PTC (PhaseTransferCatalyst)= here Aliquatt336 (~811 gram), and everything will 'seem' to slightly change color and take a slight shift in viscosity. When adding aliquat, the aliquat will float on top until the temperature rises,then it mixes all up into one fase. I6. - Now commence heating/stirring and read your thermometer in the fluid, after ~ one hour it will reach 80 C , keep the heat at 80 C for only 5 minutes, then the heat must be shut off totally, then allow the fluid to stir until roomtemperature is reached again. Don't forcefully cool with icewater or so. This will take ~2 hours. I7. -After cooling to room temperature, the mixture is poured out of the flask into a 25-30 L jerrycan, trying to keep as much KOH flakes in the flask as you can without loosing too much oil, wash the flakes with 250 ml DCM and add that to the IsoSafrole allready poured out, and then you dilute the decanted IsoSafrole with 5 L DCM (DiChloroMethane), shake thoroughly, and pour out and filter that mixture over 1 Kg Florisil (=magnesium silicate=CAS 1343-88-0 ) in 3x equal portions, the second and third time renewing the Florisil again (1Kg) in your Buchnerfilter setup. Just scrape the old, used Florisil away with the big spoon, a littlebit left on the filterpaper will do no harm at all. Try to not move the filterpaper, and wet it a bit with a spoonfull new oilmix again, before you pour the next 1 Kg portion Florisil in the funnel. So remember : you need 3 Kg Florisil , filter in 3 portions of 1 Kg. I8. -Wash then all Florisil, collected together, with 333 ml DCM 3x, so 1 Liter DCM totall, and add that DCM, after you let the Florisil precipitate, to the main IsoSafrol/DCM mix. If it is cloudy with some Florisil , use a new filterpaper in the Buchner funnel, and pour those 750 ml DCM with the washed out IsoSafrole in it through the filter into the main mixture. I9. -You now have a mix of pure IsoSafrole and DCM in the vacuum flask, which you have to pour out 3x into a normal, for chemical storage used, 25 L plastic polyphenyl PTF or polyethylene PE jerrycan. I10. -DCM is then removed at ~60 C oilbath-temp under reduced pressure from your water-aspirator in your 22L destillation setup. I11. -You now have pure isomerised olefin, IsoSafrole, purity ~>96 %, left in your destillation flask and recovered also your again pure DCM from your collector flask (change the flask several times) to use again. I12. -[THIS STEP IS ONLY NEEDED WHEN THE pH IS TOO HIGH -or- YOU THINK THERE IS STILL TOO MUCH WATER LEFT IN THE ISOSAFROLE]. Check the pH of the pure IsoSafrole with a pre-waterwetted pH paper, and if it is extensively higher then pH 11 , that means there is still too much KOH in the oil, which quickly will decompose the oil when you have to store it, so then you wash it 1x with 1 L water to get rid of any KOH, which will dissolve in the water part. In a big 20 L carboy separator funnel, fill the IsoSafrole and the 1 Liter water, shake as hell, and separate the water on top of the oil then as carefully as you can, so no water will stay in the oil. Test then if the pH of the IsoSafrole is not too high, should not exceed 11.5 . Now you add 5% in weight, dried silicagel to this still littlebitt water holding IsoSafrole oil, to remove all traces of water. Shake 10 minutes and then decant the oil or leave it in until you proceed with the next step and then decant in your clean 22 L destillation flask or whatever you use in that step first. I13. -You proceed with this IsoSafrole to make : ======================================== MDP2P : MethyleneDioxyPhenyl-2-Propanone (Classic Performic acid method) : ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Isosafrole --> MDP2P via Modified Classic Performic Acid : Materials : Same as for ISOSAFROLE, plus : 1--minimum 500 liter stainless steel milk coolingtank, with a big-ass cooling coil in the double walls, preferable in the bottom also. 1--Mixer motor, 220 Volt, non-sparking, induction type, for : 1--Mixer propellor + axle (diam. 1.5 to 2 cm), stainless steel, diam. 40 to 60 cm. 1-- 100 liter plastic container to prepare the PerAcid mix. and/or : 1--big-ass 80 liter dripping funnel, stainless steel, plastic or glass. Homemade is cheap. 1--1 meter cooled refluxing column, glass or stainless steel, to fix on the only opening of the milktank which is left open to the air. 5--meter heating cable, chemicals resistant, to use in milktank for the hydrolisis step with 15 % H2SO4. Chemicals : Reaction : 27 kg IsoSafrole, purity >/= 96 %. 99.7 kg DiChloroEthane, ClCH2CH2Cl, Industrial quality >/= 98 %. or : 99.7 kg DiChloroMethane, CH2CL2, Industrial quality >/= 98 %. 8.3 kg SodiumBiCarbonate, NaHCO3, pure. 41.5 kg Formic Acid, HCOOH, 86 %. 25.1 kg HydrogenPeroxide, H2O2 30 %. 22.43 kg Sulfuric Acid, H2SO4 Industrial quality ~99 %. 127.07 kg water, H2O, pure. 42.4 kg Methanol, CH3OH, Industrial quality >/= 98 %. Extraction : To extract from 218,9 kg hydrolized Glycol/15%H2SO4/CH3OH mix : 60 liter DCM or DCE = 3 x 20 liter, Industrial quality >/= 98 %. Method : Here are the original figures from literature in grams, for a 27 KG batch of Iso-safrole to MDP2P : ---(all figures multiplied with: 27000 grams devided by 16.25 grams = multiply them with 1661.54 ) --- M1. - Combine 16.25 grams [or 27 kg ] of Isosafrole with 50 ml=60 gram (1 liter DCE or DCM = 1,2 kg), [or 99.7 kg] DCE (DiChloroEthane) or DCM (Dichloromethane) plus 5 Grams [or 8.3 kg] Sodium bicarbonate (Sodium Hydrogen Carbonate : NaHCO3). Can be made by bubbling CO2 gas in a strong soda solution (Na2CO3.10H2O ), the sparsely soluable NaHCO3 will precipitate. M2. - Let it vigorously stirr for 2 or 3 hours, depending on the strength of your mixer [a total of 135 kg ]. This gives it time to form a pH-buffering complex which facilitates the next reaction enormously. M3. - Seperately s.l.o.w.l.y combine (under external cooling) 25 gram [41.5 kg] 86% Formic acid and 15.1 grams [25.1 kg] 30% fresh Hydrogen Peroxide (to create Performic acid) and cool to 0 C. Note : It is critical to cool when preparing this mixture or else it will, after sitting for 3 or 4 hrs without cooling, start boiling and nasty fumes will fill your lab and you will have to evacuate the place. M4. - Then drip this cold Performic-acid [66.6 kg] VERY VERY slowly , into the 135 kg ISO-DCE-Sodiumbicarbonate mix, keeping temp under 40 C with external ice-bath or other means of cooling until all is in , CO2 bubbles out of the reaction mix while dripping in (and watch the temp for the following 1-2 hours, after completing dripping in, closely, so it still can not exceed 40 C). M5. - Stir !VIGOROUSLY!, preferably with an overhead stirrer, for a total of 6(six) hours. M6. - Stop stirring and move the whole batch in portions to a big seperatory funnel, and let it sit for one hour in there. M7. - It will be orange-juice color DCE/pre-MDP2P(Glycol) mix at the bottom and clearish performic acid mix (H2O2/HCOOH) on top, the orange layer with the pre-MDP2P (Glycol) and DCE is heavy, so it goes fairly fast to the bottom of the funnel. M8. - Important Note: --------------------------------------Ma There is a perfectly logical explanation for this phenomenon : The one's who's cooling equipment functioned o.k. and thus kept the temperature between 36-40 Celsius will see the Glycol/DCM at the bottom after separation period, because they still have all their DCM left in the mix. The one's who were not so lucky and let the temperature get out of hand will see the orange layer at the top, due to an extensive loss of DCM which evaporated into thin air. The densities of the normal Glycol/DCM mix and the PerAcid mix lay close together, so if you evaporate too much DCM this balance is switched and suddenly the PerAcid mix is the heaviest layer, and falls to the bottom. You will notice then a light yellowish PerAcid mix at the bottom and a orange-juice coloured Glycol/DCM mix on top. This is no reason for real worry, unless you boiled most of the DCM away (not good for your health if you were in the same room (carcinogenic) AND not good for the reaction which did not have enough cooling capacity anymore in the last stage, depending on how high you overshoot the temp. Boiling temp of DCE = 83 C, DCM = 40 C , that's the reason WHY you must keep the temp under 40 C when you use DCM! And you must also do this when you use DCE ! Instructions are allways given with a reason, which is in literature expected to be common knowledge, but not here at a forum crowded with C(r)ooks (hehe) and a few real chemists. Thought I owed the Cooks the explanation for this reason. ---------------------------------------- M9. - Seperate into a new empty container and evaporate (low-vacuumdistillation, but KEEP the TEMP under 60 C!! so use more vacuum , so go lower then 700 mbar if the temp rises too high) the DCE off and stock that recovered DCE for future use. M10. - You should add now 180 grams [but in reality, in contradiction to the official reference, only HALF the amount necessairy!, so 90 grams = 149,5 kg] of 15% Sulfuric acid (H2SO4) [so : add 22.43 kg 99% H2SO4 to 127.07 kg water], boil it until it starts refluxing back with slight addition of 60ml=51 gram Methanol [only HALF! needed, so 25.5 gram = 42.4 kg Methanol (1L methanol=0.85 kg)] through the cooling/reflux condenser added on the distillation kettle for 2 hrs. No longer then 2 hours !!! Or you will begin to loose product-yield. You now converted the Glycol to raw MDP2P, mixed with some pollutants. M11. - Let it cool and extract 3 times with enough DCM (or DCE), (minimum 10 reactionvolume-percent per extraction). M12. - Combine the DCM or DCE extractions and then boil the solvent (DCM or DCE) off (in fact no vacuum needed, but if you are in a hurry:)with one or more aspirators combined or diafragm vacuumpump to get brown oil that is peppery and cardamon smell. M13. - You get around 16 grams [26.6 kg] -dirty- MDP2P. M14. - To get the real clean MDP2P, you will have to vacuum-distillate this dirty MDP2P-base again to get a reasonable yield of about 73-75 % (grammole-percent)= 17.8 kg clean MDP2P which should be light yellow, or if you distill exact and have no leaks to let tiny amounts of air in, and you don't let the temp go over 170 C, at ~20 mbar vacuum, it would be clear with no color. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Note: In weight/weight procents you get 16 / (16.25 / 100%) = 98.46 w/w % , but yield is scientifically allways given in Mole-percents, so: (16 gram x 178.188=molecularweight MDP2P / (16.25 gram x 162.188=molweight Iso / 100%) = 2851.008 grammole / (2635.555 grammole / 100%) = 108.17 mole %. But the effective mole % after distillation (=ultimate clean-up, no washings then necessary!) is 75%. 20 mbar x 0.01450138 = 0.29 psi, which is good enough for all distillations we work with ! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Here are the four threads on the old board I found back again which are relevant for the classic performic: 1. smokemouth: "LaBTOP/Gyro performic results - Sumerian" (Methods Discourse) LaBTOP-Gyro performic results - Sumerian . 2. smokemouth: "LaBTop/Gyro's Modified Performic Questions - Synthia" (Methods Discourse) LaBTop-Gyro's Modified Performic Questions - Synthia. 3. smokemouth: "New Performic Scale Up Question? - artech" (Methods Discourse) New Performic Scale Up Question - artech. 4. smokemouth: "The correct way to mdp2p via performic - gyrogearloose" (Methods Discourse) The correct way to mdp2p via performic - gyrogearloose . And this is the original Classic Performic post in the thread : http://hive.lycaeum.org/ubb_board/Forum3 Classical Per-acid oxidation of Isosafrole to get Piperonylacetone (MDP2P): (Iso.) [R]-CH=CH-CH3 ----> [R]-CH2-C(=O)-CH3 (Pip.Ac.) R=Methylenedioxyphenyl The PerAcid solution is made from 25 g. HCOOH (formic acid)(86% ,starting from 99% HCOOH) and 15.1 g. 30% H2O2 (hydrogen peroxide). This sol. is added to a mixed sol. of 16.25 g. Isosafrole(>/=90%) and 1,5 g. NaHCO3 (!!) in 50 ml CH2Cl-CH2Cl at 35-40 C. The temp. is during 6 Hrs. mixing regularaly checked and kept within 35-40 C. The solvent is evaporated (vacuum, keep TEMP! UNDER! 60 C.!). Residue is boiled with 180 g. 15% H2SO4 for 2 Hrs. Extraction with 3 x 100 ml.CHCl3, wash with water,dry over MgSO4 and evaporation of the solvent gives a brown oil (purity >/=90%). Supplemental purifying by Kughelruhr destillation (~70 C, 0,2 Torr) gives 70-75% yield of MDP2P (>/= 95% pure!) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ And this is the latest info from Ritter, who by the way posted this method first, then Beagle_boy , then me, then Gyrogearloose, so this method needed 3 times posting to get the attention needed, so lets call it from now on the Classic Performic, to avoid any misunderstandings: Ritter (Stranger) 06-20-00 14:26 Re: LabTop modified performic method? The reaction runs best as described in my writeup! Adding carbonate to formic/peroxide first would surely lead to a nasty volcano and would not help any. Carbon Dioxide is emitted as performic is slowly added to alkene/carbonate solution. As far as advances are concerned a few things have been realized. Extremely vigourous stirring, such as that produced by a mechanical stirring rig, seems to increase yields. If a considerable amount of isoalkene is recovered during vacuum distillation an easy solution is to add more performic acid mix to rxn. This is usually an indicator that the peroxide used has degraded somewhat below 30%. With this MDP2P you proceed to make : ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ NaBH4 : REDUCTIVE AMINATION of MDP2P and P2P : ---------------------------------------- REACTION MECHANISMS :
NOTE : We know now, july 2000 , that it's much
better to follow the basic rules from the P2P to Methamphetamine synthesis
also for the MDMA and MDA synthesis, in fact you MUST use silicagel (pre-dried at 300 C for 2 hrs) in
all relevant steps, especially, when you make first the imine and later
the amine conversion by adding NaBH4 to the
Imine. These quantity-parts are in weight! |
||||||||