Pd/C and RuCl2(PPh3)3/DPEphos effectively catalyzed the alkylation of indole with alcohols to give 3‐substituted indoles selectively. Various types of substrates were examined and were found to give the corresponding 3‐substituted indoles in up to 99 % yield. Under different reaction conditions, RuCl2(PPh3)3/DPEphos catalyzed the selective formation of bis(3‐indolyl)phenylmethane derivatives.
A Highly Regioselective C-3 Benzylation Reaction of Indoles with Alcohols Catalysed by an N-Heterocyclic Carbene
作者:Yan-fang Zhu、Guo-ping Lu、Chun Cai
DOI:10.3184/174751915x14376593652711
日期:2015.8
The direct C-3alkylation of indoles with primary and secondary alcohols through the combination of KOH and an N-heterocyclic carbene is described. The KOH/NHC-catalysed system can give desired C-3 alkylated indoles with high selectivity in moderate to excellent yields. Moreover, this process has obvious advantages such as high atom economy and the absence of a metal source.
Nickel-catalyzed C3-alkylation of indoles with alcohols <i>via</i> a borrowing hydrogen strategy
作者:Miao Hu、Yong Jiang、Nan Sun、Baoxiang Hu、Zhenlu Shen、Xinquan Hu、Liqun Jin
DOI:10.1039/d1nj01581h
日期:——
An efficient Ni-catalyzed C3-alkylation of indoles with alcohols via a borrowing hydrogen pathway was achieved utilizing an N,O-donor coordinated nickel complex as the precatalyst.
Efficient copper-catalyzed synthesis of C3-alkylated indoles from indoles and alcohols
作者:Ngoc-Khanh Nguyen、Duong Ha Nam、Ban Van Phuc、Van Ha Nguyen、Quang Thang Trịnh、Tran Quang Hung、Tuan Thanh Dang
DOI:10.1016/j.mcat.2021.111462
日期:2021.4
A highly efficient copper(II) catalyst system for alkylation of indoles with alcohols via hydrogen borrowing method has been developed to afford C3-alkylated indoles in good to excellent yields. Cu(OAc)2 in the combination with dppm ligand has been found to be the most suitable catalyst system for this alkylation reaction.
Indoles are a popular heterocycle scaffold that can be found in various natural products and advanced materials, which are related to our daily life commodities. In this work, we developed an efficient method to synthesize C3-alkylated and alkenylated indoles via manganese-catalyzed dehydrogenative transformation of benzyl alcohols and 2-arylethanols with indoles under mild conditions with high yield