Sodium Hydroxide → 1-(2-toluoylmethyl)-2-oxo-3-tert-butoxycarbonylamino-5-benzyloxycarbonyl-8-methyl-1,3,4,5-tetrahydro-2H-1,5-benzodiazepine

Participants

Reaction Steps

2-Oxo-3-tert-butoxycarbonylamino-5-benzyloxycarbonyl-8-methyl-1,3,4,5-tetrahydro-2H-1,5-benzodiazepine (23.1 g) was suspended in toluene (320 ml), 2-bromo-2′-methylacetophenone (13.9 g), 1N aqueous sodium hydroxide (160 ml) and tetra-n-butylammonium bromide (400 mg) were added thereto, the mixture was stirred for 2 hours at room temperature. After reaction, the reaction mixture was separated, the organic layer was washed with saturated brine, and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure, the residue was purified by silica gel column chromatography(n-hexane:ethyl acetate=4:1), to thereby obtain 12.9 g of the titled compound.

Provenance & Evidence