Additive-Free Copper(I)-Mediated Synthesis of 5- or 6-Brominated 2-Aryl-1<i>H</i>-Indole-3-Carboxylates from α,α-Dibromo β-Iminoesters
作者:Zhenfa Li、Lan Zhao、Liuyi Liang、Lixin Zhao、Fangyi Li、Chunhua Wang、Zheng Li
DOI:10.1021/acs.joc.0c02497
日期:2021.1.15
Additive-free copper(I)-bromide-mediated radical cyclization reactions of α,α-dibromo β-iminoesters were investigated, enabling the synthesis of a series of 5- or 6-brominated 2-aryl-1H-indole-3-carboxylates in moderate to good yields. The mechanistic study showed that (i) the bromine atom originated from the substrates and (ii) the bromination might be related to a 3-bromo-3H indole intermediate via
Iodine-Mediated Synthesis of 3<i>H</i>-Indoles via Intramolecular Cyclization of Enamines
作者:Zhiheng He、Huanrong Li、Zhiping Li
DOI:10.1021/jo100796s
日期:2010.7.2
The synthesis of 3H-indoles was achieved via the iodine-mediated intramolecular cyclization of enamines. A wide variety of 3H-indole derivatives bearing multifunctional groups were obtained in good to high yields under transition metal-free reaction conditions.