Chlorophenyl isocyanate → 3-(2-Chlorophenylureido)-1,3-dihydro-5-(2,6-dimethoxy-4-methylphenyl)-1-methyl-1,4-benzodiazepin-2-one

Participants

Reaction Steps

To 56 mg of 3-amino-1,3-dihydro-5-(2,6-dimethoxy-4-methylphenyl)-1-methyl-1,4-benzodiazepin-2-one in 10 ml of dichloromethane is added 0.022 ml of 2-chlorophenyl isocyanate and the reaction mixture is then stirred at room temperature overnight. It is concentrated under vacuum and the residue is crystallized from isopropyl ether to give 3-(2-chlorophenylureido)-1,3-dihydro-5-(2,6-dimethoxy-4-methylphenyl)-1-methyl-1,4-benzodiazepin-2-one; m.p.=260° C.; Yield=91%.

Provenance & Evidence