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Did any of you ever manage to make it work? It's a method described in the US patent 1,879,003. 1 mol of phenyl-2-nitropropene, C6H5CH=C(CH3)NO2, is dissolved with a solvent prepared by mixing 1000ml of ethanol with 500ml of acetic acid and 500ml of 12 N sulfuric acid. The resultant solution is...

So the ether extraction did work so this problem has been solved, unfortunately my yield keeps being extremely poor, can't get beyond 10%... Guess I will make another thread to discuss this issue to keep things clean. Thank you everyone for help once again.

So I tried using more dilute NaOH solution (15%) and it didn't help. The recipe says I should see two layers but it doesn't happen, I'm left with a homogeneous aqueous solution. It stinks like amphetamine, it must be there. Guess I will try to add some diethyl ether now to see if I can extract...

Thank you very much for you response too, William. :) I will. Saturated solution. Now as I think about it maybe I should add more dH2O to it so the Na2SO4 doesn't precipitate but rather stays dissolved in water. Maybe the problem is that amine sulfate crystals get trapped in Na2SO4 crystals...

Thank you very much for you response G. Patton. None. When I put Marquis on the white powder (final product) there is no reaction at all, the powder stays white. But when it's still dissolved in H2SO4, after synthesis and before I add NaOH to get it out of the acid, I add Marquis to it and it...

I synthesized amphetamine freebase from P2NP using an electrolytic method according to US patent 1,879,003. Everything goes well up to the point when I'm left with amphetamine freebase dissolved in H2SO4. H2SO4 is slightly impure containing CuSO4 (can't get pure stuff as it's completely illegal...