Building polycyclic indole scaffolds via gold(I)-catalyzed intra- and inter-molecular cyclization reactions of 1,6-enynes
作者:Patricia Pérez-Galán、Herbert Waldmann、Kamal Kumar
DOI:10.1016/j.tet.2016.03.020
日期:2016.6
A gold(I) catalyzed cycloisomerization of indolyl-1,6-enynes via 5-exo-dig cyclization is reported. The reaction passes through an intermediate whose fate can be steered to yield different indole polycyclic scaffolds through various intra- and inter-molecular cyclization reactions. One of the key transformations of indolyl-1,6-enynes was a formal [2+2+2] cycloaddition reaction with various aldehydes
报道了金(I)经由5- exo - dig环化反应的吲哚基1,6-烯炔的环异构化。该反应通过中间体,该中间体的命运可以通过各种分子内和分子间环化反应来控制,以产生不同的吲哚多环骨架。吲哚基-1,6-烯炔的关键转化之一是与各种醛的正式的[2 + 2 + 2]环加成反应,以提供类似天然产物的四环吲哚。