Ethynyl-cyclohexanol: an efficient acetylene surrogate in Sonogashira coupling
摘要:
The Sonogashira coupling of aryl halides in the presence of 1-ethynyl-cyclohexanol as an acetylene source provides an efficient method for the synthesis of diarylacetylenes without the isolation of the appropriate arylacetylenes. (c) 2007 Elsevier Ltd. All rights reserved.
Tandem Sonogashira Coupling: An Efficient Tool for the Synthesis of Diarylalkynes
作者:Zoltán Novák、Péter Nemes、András Kotschy
DOI:10.1021/ol047983f
日期:2004.12.1
[reaction: see text] The tandem Sonogashiracouplingreaction of aryl halides provides an efficient method for the synthesis of diarylalkynes. Several aryl halides were coupled with 2-methyl-3-butyn-2-ol as acetylene source in the presence of PdCl2(PPh3)2 and CuI. Following the deprotection of the acetylene moiety in the same pot using a strong base, the Sonogashiracoupling of a second aryl halide