Iodine-catalyzed aromatization of tetrahydrocarbazoles and its utility in the synthesis of glycozoline and murrayafoline A: a combined experimental and computational investigation
The reactions of 1,2,3-trimethylindole and of N-alkyltetrahydrocarbazoles with trifluoroacetic anhydride
作者:A. Sydney Bailey、Joanna B. Haxby、Andrew N. Hilton、Josephine M. Peach、Marazban H. Vandrevala
DOI:10.1039/p19810000382
日期:——
Treatment of 1,2,3-trimethylindole with trifluoroaceticanhydride results in attack on the C-2 methyl group of the indole, and trifluoroacetylation of N-alkyltetrahydrocarbazoles occurs at C-1.
[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.
hydrogenation, the meltingpoints of pure N-ethylcarbazole derivatives with increasing degree of hydrogenation as well as the liquidus line of the binary mixture of N-ethylcarbazole and N-ethyl-dodecahydro-carbazole were measured. Because of their structural and chemical resemblance binary mixtures consisting of different alkylcarbazole combinations were analyzed regarding their potential for a melting poi...
METHOD FOR SYNTHESIS OF N-ALKYL CARBAZOLE AND DERIRATIVES THEREOF
申请人:Gharda Keki Hormusji
公开号:US20120149915A1
公开(公告)日:2012-06-14
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.