The present invention relates to an improved process for the preparation of 10-oxo-10,11-dihydiO-5H-dibenz[b,fjazepine-5-carboxamide (Oxcarbazepine) by reacting 10-methoxy-5H-dibenz[b,f]azepine (10-methoxyiminostilbene) and alkali metal cyanate in presence of α-hydroxy acids, and also relates to the process for the preparation of carbamazepine from iminostilbene. Further the present invention is directed to the novel crystalline form of 10-methoxy carbamazepine.
这项发明涉及一种改进的工艺,用于通过在α-羟基酸存在下,将10-甲氧基-5H-二苯并[b,f]氮杂
蒽(10-甲氧基
亚胺基
蒽)和碱
金属
氰酸盐反应制备10-氧代-10,11-二氢-5H-二苯并[b,f]氮杂
蒽-5-甲酰胺(
奥卡西平),并且还涉及从
亚胺基
蒽制备
卡马西平的工艺。此外,该发明还涉及10-甲氧基
卡马西平的新结晶形式。