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Centaur Chemicals Pvt Ltd
| Centaur Chemicals Pvt Ltd Patent applications | ||
| Patent application number | Title | Published |
|---|---|---|
| 20090093629 | PROCESS FOR PREPARATION OF TRIAZOL-BENZODIAZEPINE DERIVATIVES - An improved process for preparation of triazol-benzodiazepine derivatives, such as alprazolam, triazolam, brotizolam and etizolam, is presented. The process comprises a cyclization reaction of compound Formula B in toluene with catalytic amount of p-toluene sulphonic acid to obtain the triazol-benzodiazepine derivative of Formula C: | 04-09-2009 |