[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 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 producing tertiary amines from highly hindered aromatic secondary amines and carbonates
申请人:PPG INDUSTRIES, INC.
公开号:EP0104601A1
公开(公告)日:1984-04-04
Highly hindered aromatic secondary amines are reacted with organic carbonates of at least one primary alcohol to produce tertiary amines. The alkylation of such secondary amines with dialkyl carbonates in which at least one of the alkyl groups of the dialkyl carbonate is unsubstituted methyl or is an alkyl group having at least two carbon atoms wherein the number one carbon atoms of the alkyl group is attached to two hydrogen atoms, is preferred.
Die vorliegende Erfindung betrifft Verfahren zur Herstellung von N-Ethylcarbazol durch Umsetzung von Carbazol oder N-Ethoxycarbonylcarbazol mit Diethylcarbonat.
本发明涉及一种通过咔唑或 N-乙氧羰基咔唑与碳酸二乙酯反应制备 N-乙基咔唑的工艺。
METHOD FOR SYNTHESIS OF N-ALKYL CARBAZOLE AND DERIVATIVES THEREOF