Potassium Cyanide → trans-2-methylcyclohexyl (S)-8-chloro-11,12,13,13a-tetrahydro-9-oxo-9H-imidazo[1,5-a]pyrrolo[2,1-c][1,4]benzodiazepine-1-carboxylate

Participants

Reaction Steps

A mixture of 3.45 (10 mmol) of ethyl (S)-8-chloro-11,12,13,13a-tetrahydro-9-oxo-9H-imidazo[1,5-a]pyrrolo[2,1-c][1,4]benzodiazepine-1-carboxylate, 11.4 g (100 mmol) of trans-2-methylcyclohexanol and 100 mg of powdered potassium cyanide is stirred at 130° for 6 hours, the solution obtained is evaporated to dryness and the residue is chromatographed on a silica gel column. By recrystallization from ethyl acetate there is obtained trans-2-methylcyclohexyl (S)-8-chloro-11,12,13,13a-tetrahydro-9-oxo-9H-imidazo[1,5-a]pyrrolo[2,1-c][1,4]benzodiazepine-1-carboxylate of melting point 213°-215° (1:1 mixture of the two diastereoisomers).

Provenance & Evidence