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ephedrine hydrochloride
Stage one: 1-Phenylpropan-1-one Bromination
Stage two: Preparation and Washing of Methcathinone Hydrochloride
Stage three: Methcathinone Hydrochloride Formation

Edit: 6:20 - 125 ml of ethyl acetate
https://bbgate.com/threads/synthesis-of-methcathinone-hydrochloride-from-propiophenone.9410
1) BMK ethyl glycidate synthesis from benzaldehyde.
2) BMK glycidic acid (sodium salt) synthesis BMK ethyl glycidate.
3) Phenylacetone (P2P) synthesis from BMK glycidic acid (sodium salt).

https://bbgate.com/threads/phenylacetone-p2p-synthesis-via-bmk-ethyl-glycidate.7549/
A 2,5-Dimethoxybenzaldehyde and nitroethane condensation produces 1-(2,5-dimethoxyphenyl)-2-nitropropene. A 1-(2,5-Dimethoxyphenyl)-2-nitropropene reduction gives 2,5-dimethoxyamphetamine (2,5-DMA) free base.

https://bbgate.com/threads/dox-phenethylamines-series-dob-dom-doi-doc-syntheses.1697/
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