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
Ethynyl-cyclohexanol: an efficient acetylene surrogate in Sonogashira coupling
作者:Márton Csékei、Zoltán Novák、András Kotschy
DOI:10.1016/j.tet.2007.10.031
日期:2008.2
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.
Palladium-catalyzed sequential indole synthesis using sterically hindered amines
作者:Lutz Ackermann、René Sandmann、Marvin Schinkel、Mikhail V. Kondrashov
DOI:10.1016/j.tet.2009.07.073
日期:2009.10
A palladium catalyst derived from a bulky N-heterocyclic carbene ligand enabled a modular synthesis of indoles bearing sterically hindered N-alkyl or N-aryl substituents through a reaction sequence comprising an intermolecular N-arylation and an intramolecular hydroamination.