SYNTHESIS OF 2-METHYL-4- (4-METHYL-1-PIPERAZINYL) -1OH-THIENO (2, 3-B) (1,5) BENZODIAZEPINE AND ITS SALTS

摘要

The invention belongs to the field of organic chemistry and relates to a new process for the purification of olanzapine comprising preparation of acid addition salts of olanzapine and transformation thereof into a pharmaceutically acceptable pure and discoloured final product. The present invention also relates to new processes for the preparation of pure olanzapine.