Ranbaxy Laboratories, Inc.

Girij Pal Singh

Naresh Kumar

Pankaj Sharma

Jag Mohan Khanna

Mukesh Kumar Sharma

Chandrahas Khanduri

Swargam Sathyanarayan

A multistep process for producing 8-chloro-6-(2-fluorophenyl)-1-methyl-4-H-imidazo�1,5a!�1,4!benzodiazepine (midazolam) comprises treating a compound of Formula II with a lower alkyl dithiol to produce a compound of Formula III, wherein n=2 or 3, converting the compound of Formula III to a compound of Formula VII, and then treating the compound of Formula VII with a deprotecting agent, thereby producing midazolam. Novel intermediate compounds are also disclosed.

Process for the manufacture of

A multistep process for producing 8-chloro-6-(2-fluorophenyl)-1-methyl-4-H-imidazo�1,5a!�1,4! benzodiazepine (midazolam) comprises treating a compound of Formula II with a lower alkyl dithiol to produce a compound of Formula III, wherein n=2 or 3, converting the compound of Formula III to a compound of Formula VII, and then treating the compound of Formula VII with a deprotecting agent, thereby producing midazolam. Novel intermediate compounds are also disclosed.

Process for the manufacture of 8-chloro-6 (2-fluorophenyl)-1

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New Delhi, India

Girij Pal Singh