1-Methylpiperazine → 5-{4-[2-(4-methylphenyl)benzoylamino]benzoyl}-1-[2-(4-methyl-1-piperazinyl)ethyl]-1,3,4,5-tetrahydro-1,5-benzodiazepin-2(2H)-one

Participants

Reaction Steps

To a mixture of 1-formylmethyl-5-{4-[2-(4-methylphenyl)benzoylamino]benzoyl}-1,3,4,5-tetrahydro-1,5-benzodiazepin-2(2H)-one (380 mg) and 4-methylpiperazine (73.4 mg) in a mixture of methanol (10 ml) and acetic acid (0.5 ml) was added sodium cyanoborohydride (46.1 mg) and the mixture was stirred at ambient temperature for 5 hours. The mixture was poured into a mixture of chloroform and saturated aqueous sodium hydrogen carbonate and the mixture was stirred at ambient temperature for 30 minutes. The solution was extracted with chloroform and washed with brine, and dried over magnesium sulfate. The solvent was evaporated in vacuo and the residue was subjected to a silica gel column (20g, 5% methanol in chloroform). The solvent was evaporated in vacuo and the residue was solidified with diethyl ether to give 5-{4-[2-(4-methylphenyl)benzoylamino]benzoyl}-1-[2-(4-methyl-1-piperazinyl)ethyl]-1,3,4,5-tetrahydro-1,5-benzodiazepin-2(2H)-one (115 mg).

Provenance & Evidence