The present invention relates to novel process for the preparation of 9-ethyl-6,6-dimethyl-8-[4-(morpholin-4-yl)piperidin-1-yl]-11-oxo-6,11-dihydro-5H-benzo[b]carbazole-3-carbonitrile hydrochloride compound of formula-1a, represented by the following structural formula: The present invention also provides an improved process for the preparation of tert-butyl-4-(4-ethyl-3-iodophenyl)-4-methyl-3-oxopentanoate having the following structural formula which is useful in the preparation of Alectinib and its pharmaceutical acceptable salts.
本发明涉及一种新型制备9-乙基-6,6-二甲基-8-[4-(
吗啡啉-4-基)
哌啶-1-基]-11-氧代-6,11-二氢-5H-苯并[b]
咔唑-3-羧腈盐酸盐化合物的方法,该化合物的结构式如下所示:同时,本发明还提供了一种改进的制备叔丁基-4-(4-乙基-3-
碘苯基)-4-甲基-
3-氧代戊酸酯的方法,该化合物的结构式如下所示,该方法在阿雷替尼及其药用可接受盐的制备中有用。