Formaldehyde → 3-Methyl-11-[4-methyl-(S)-3-phenethyl-piperazin-1-yl]-5H-dibenzo[b,e][1,4]diazepine

Participants

Reaction Steps

Combine 3-methyl-11-[(S)-3-phenethyl-piperazin-1-yl]-5H-dibenzo[b,e][1,4]diazepine (375.0 mg, 0.95 mmol), formaldehyde (84.4 μL, 1.04 mmol, 37% in water), and 1,2-dichloroethane (30.0 ml). Stir the mixture at ambient temperature for 5 minutes and then add sodium triacetoxyborohydride (300.6 mg, 1.42 mmol). After stirring for 30 minutes at ambient temperature, quench the reaction with saturated sodium bicarbonate. Remove the organic portion and wash (brine), dry (sodium sulfate), and reduce the extracts to residue. Purify the residue on silica gel using dichloromethane/methanol (90:10) to give 329.5 mg (85%) of the title compound as a tan foam: mp 65°, dec; mass spectrum (ion spray): m/z=411.3 (M+1).

Provenance & Evidence