I got an aneurysm from all the bs a lot of people have written.
Buy bmk (5449-12-7) hydrolise with phosphoric acid (85%) 3:4 (BMK
hosphoric acid) (slow addition of the bmk).
Reflux with stirring on 140-150 celsius for 4-5 hours.
Top layer is P2P bottom is garbage discard it.
Wash the P2P with water and brine (optional because sometimes emulsions form sometimes it's clean really depends where you got the bmk powder)
Vacuum or steam distill it. (optional)
Dry with MgSO4 or Na2SO4.
TOTAL YIELD P2P IS AROUND 65-70% OF BMK POWDER USED
Mix P2P Formamide and formic acid 1:1.5:1 (formic acid and formamide are in excess; formic acid is 85% - 15% form/water)
Reflux with stirring for 4-5 hours at 140-150 celsius.
Cool the reaction or wait it to cool on it's own.
2 layers form after - top layer (cognac color is your Formylamphetamine, bottom layer is junk with minimal amount of formyl, can be extracted with DCM)
Formylamphetamine should be slightly more in quantity than the P2P used.
Hydrolise formylamphetamine with NaOH 60-70% (Formyl group has a weak bond it can be hydrolised just with NaOH not the typical Leuckart) ; 1:1.5 by refluxing at 110-120 celsius for 2-3 hours
Top layer is crude amphetamine base, bottom layer is sometimes liquid sometimes liquid-solid junk.
Vacuum or steam distill the crude amphetamine base.
Dry the distillate on Na2SO4 or MgSO4.
Mix the dried product 1:5 with pure dried methanol.
While stirring non stop add dropwise 98%+ H2SO4 until pH 6.5 is reached.
Once reached seal reaction vessel and put in fridge to settle for 24 hours.
Filter through buchner funnel, rag or whatever is suitable at time of work.
Residue in filter is amphetamine sulphate.
Dry it at room temperature and sunlight on big filter paper sheets.
In some cases the final product is yellowish jelly-like due to oxidation, in that case dissolve it in minimal amount of hot pure IPA and put in fridge for 2 hours to cool.
Filter again using buchner, rag, sheets or whatever. The clean white residue in the filter is purest amphetamine sulphate. Evap the filtrate IPA to get the rest amph.
TOTAL YIELD DRY PURE AMPHETAMINE SULPHATE FROM P2P USED IS AROUND 30-40%!!!
YES I HAVE DONE THIS WHOLE REACTION NUMEROUS TIMES!!!