how do you know reaction 2b4mp with methylamin is over?
- By olduser
layer separation + a slight color change
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- By olduser
Sorry for the late reply
In the first photo, you can see the freebase oil on top. You need to extract it with apolar solvent (like benzene here but you could use EtOAc too by example).
Seeing the photos, I think you are talking about steps 2 and 3 not 1-2. If you added the acid already, then this "residue" is mostly mephedrone. If you didn't yet it's quite strange. Could be unreacted 2B4M but that's a lot.
When did the precipitate formed ?
In the first photo, you can see the freebase oil on top. You need to extract it with apolar solvent (like benzene here but you could use EtOAc too by example).
Seeing the photos, I think you are talking about steps 2 and 3 not 1-2. If you added the acid already, then this "residue" is mostly mephedrone. If you didn't yet it's quite strange. Could be unreacted 2B4M but that's a lot.
When did the precipitate formed ?
- By mewnmewamine
You could also purify the mephedrone via the bisulfite adduct very easily and cheaply
dissolve the meph in whatever then add bisulfite sol and filter
dissolve the meph in whatever then add bisulfite sol and filter