Acetic Anhydride → HCID 21442717, compound

Participants

Reaction Steps

A mixture of 1.2 g. of 6--(2-chlorophenyl)-8-ethyl-4H-thieno[3,2-f]-s-triazolo[1,5-a][1,4]diazepine-2-carboxamide-5-oxide and 20 ml. of acetic anhydride is heated at 90° to 95° C. for 50 minutes, and then the solvent is evaporated. The residue is washed with ether to give 4-acetoxy-6-(2-chlorophenyl)-8-ethyl-4H-thieno[3,2-f]-s-triazolo[1,5-a][1,4]diazepine-2-carboxamide as crystals. Recrystallization from ethyl acetate gives colorless prisms melting at 168° to 170° C.

Provenance & Evidence