Dichloromethane → HCID 178482720, compound

Participants

Reaction Steps

To 160 ml of a methylene chloride solution containing 16.93 g of 4-(tert-butoxycarbonylamino)cyclohexanone and 10.55 ml of N-methylbenzylamine was added 19.08 g of sodium triacetoxyborohydride under ice-cooling, and the mixture was stirred at room temperature for 14 hours. The reaction mixture was diluted with an aqueous sodium hydrogencarbonate solution and extracted with ethyl acetate. The extract was washed with water and brine, dried over anhydrous sodium sulfate and the solvent was removed under reduced pressure. The obtained residue was suspended in hexane and collected by filtration. This mother liquor was concentrated and the residue was purified by NH-silica gel chromatography (solvent: hexane-ethyl acetate (97:3 to 83:17)). The residue was further suspended in hexane and collected by filtration and combined with the filtered product to-obtain 13.55 g of N′-benzyl-N-tert-butoxycarbonyl-N′-methyl-trans-1,4-cyclohexanediamine.

Provenance & Evidence