[EN] METHOD FOR SYNTHESIS OF N-ALKYL CARBAZOLE AND DERIVATIVES THEREOF<br/>[FR] MÉTHODE DE SYNTHÈSE D'UN N-ALKYL-CARBAZOLE ET DE SES DÉRIVÉS
申请人:GHARDA KEKI HORMUSJI
公开号:WO2011024186A1
公开(公告)日:2011-03-03
Disclosed is a process for the preparation of N-alkyl carbazole. Said process comprises: a) chlorinating cyclohexanone to form 2-chlorocyclohexanone; b) reacting 2-chlorocyclohexanone with N-ethyl aniline to form 2-(N-ethyl anilino) cyclohexanone; c) cyclizing 2-(N-ethyl anilino) cyclohexanone by refluxing with simultaneous water removal to obtain 9-ethyltetrahydrocarbazole; d) treating 9-ethyl-tetrahydrocarbazole with concentrated hydrochloric acid followed by water wash for removing N-ethyl aniline; e) dehydrogenating 9-ethyltetrahydrocarbazole by heating 9-ethyltetrahydrocarbazole in a solvent, in presence of a catalyst to obtain N-alkyl carbazole.
Method for synthesis of N-alkyl carbazole and derivatives thereof
申请人:Gharda Keki Hormusji
公开号:US08604219B2
公开(公告)日:2013-12-10
Disclosed is a process for the preparation of N-alkyl carbazole. Said process comprises: a) chlorinating cyclohexanone to form 2-chlorocyclohexanone; b) reacting 2-chlorocyclohexanone with N-ethyl aniline to form 2-(N-ethyl anilino)cyclohexanone; c) cyclizing 2-(N-ethyl anilino) cyclohexanone by refluxing with simultaneous water removal to obtain 9-ethyltetrahydrocarbazole; d) treating 9-ethyl-tetrahydrocarbazole with concentrated hydrochloric acid followed by water wash for removing N-ethyl aniline; e) dehydrogenating 9-ethyltetrahydrocarbazole by heating 9-ethyltetrahydrocarbazole in a solvent, in presence of a catalyst to obtain N-alkyl carbazole.