An efficient synthesis of carbazoles from PtCl2-catalyzed cyclization of 1-(indol-2-yl)-2,3-allenols
作者:Wangqing Kong、Chunling Fu、Shengming Ma
DOI:10.1039/b909649c
日期:——
The PtCl2-catalyzed reaction of 1-(indol-2-yl)-2,3-allenols occurred smoothly to form carbazoles by connecting the 3-carbon atom of indole with the 4-carbon atom of the allenol moiety, referring to the carbon atom connected to the hydroxyl group.
LOPP, M. I.;MYURAUS, A. J.;PARVE, O. V.;VYALIMYAEH, T. K.;LOPP, A. X.;LIL+, BIOORGAN. XIMIYA, 14,(1988) N 2, 222-231
作者:LOPP, M. I.、MYURAUS, A. J.、PARVE, O. V.、VYALIMYAEH, T. K.、LOPP, A. X.、LIL+
DOI:——
日期:——
Efficient synthesis of carbazoles via PtCl2-catalyzed RT cyclization of 1-(indol-2-yl)-2,3-allenols: scope and mechanism
作者:Wangqing Kong、Chunling Fu、Shengming Ma
DOI:10.1039/c1ob06474f
日期:——
A detailed study on the scope of the efficient PtCl2-catalyzed synthesis of carbazoles from 1-(indol-2-yl)-2,3-allenols is described. Through isotopic labeling experiments, it is confirmed that the reaction proceeds through a unique metal carbene intermediate, which undergoes subsequent highly selective 1,2-hydrogen migration to afford carbazoles. The reaction shows wide scope and allows the introduction of a variety of different substituents at different positions on the carbazole due to the substituent-loading capability of both indole and the allene moiety.