Palladium-catalyzed synthesis of 2,3-disubstituted indoles <i>via</i> arylation of <i>ortho</i>-alkynylanilines with arylsiloxanes
作者:Yang-Ting Hsia、Yu-Lin Lu、Rekha Bai、Satpal Singh Badsara、Chin-Fa Lee
DOI:10.1039/d3ob00961k
日期:——
study, we report the electrophiliccyclization of N,N-dimethyl-o-alkynylanilines with arylsiloxanes in the presence of [Pd(OAc)2] and Ag2O catalytic system, which leads to the efficient synthesis of indoles, similar to the one that is obtained through Larock indole synthesis. A range of aryl(trimethoxy)silanes with EDGs and EWGs were successfully utilized for the synthesis of a diverse variety of substituted
A Novel Synthetic Route to 3-Sulfenyl- and 3-Selenylindoles by <i>n</i>-Bu<sub>4</sub>NI-Induced Electrophilic Cyclization
作者:Yu Chen、Chul-Hee Cho、Richard C. Larock
DOI:10.1021/ol8021287
日期:2009.1.1
3-Sulfenyl- and 3-selenylindoles are prepared In excellent yields by the palladium/copper-catalyzed crossing coupling of N,N-dialkyl-o-iodoanilines and terminal alkynes, followed by electrophilic cyclization with arylsulfenyl chlorides and arylselenyl chlorides in the presence of a stoichiometric amount of n-Bu4NI.
An efficient, microwave-assisted, one-pot synthesis of indoles under Sonogashira conditions
作者:Yu Chen、Nataliya A. Markina、Richard C. Larock
DOI:10.1016/j.tet.2009.07.075
日期:2009.10
A microwave-assisted, one-pot, three-component coupling reaction for the synthesis of indoles has been developed. The reaction is carried out in two steps under standard Sonogashira coupling conditions from an N-substituted/N,N-disubstituted 2-iodoaniline and a terminal alkyne, followed by the addition of acetonitrile and an aryl iodide. A variety of polysubstituted indoles have been prepared in moderate to excellent yields using the present method. (C) 2009 Elsevier Ltd. All rights reserved.