Sodium cyanoborohydride → N-methoxy-1-(2,4,6-trichlorophenyl)propan-2-amine

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Reaction Steps

To a stirred solution of crude 1-(2,4,6-trichloro-phenyl)-propan-2-one O-methyl-oxime prepared as described in example P4, (12.3 g, 0.046 mol) in acetic acid (120 ml), sodium cyanoborohydride (6.1 g, 0.097 mol) was added portionwise at 12 to 15° C. The reaction mass was stirred at ambient temperature for 18 hours. TLC confirmed the completion of reaction, then solvent was evaporated under reduced pressure (co-evaporation with toluene twice). The resulting residue was poured on to 1 N sodium hydroxide solution (150 ml) and extracted with dichloromethane (2×100 ml). The combined organic layer was washed with water (2×100 ml) followed by drying over anhydrous sodium sulfate before evaporating the solvent to afford crude O-Methyl-N-[1-methyl-2-(2,4,6-trichloro-phenyl)-ethyl]-hydroxylamine (12.3 g, 100%).

Provenance & Evidence