Arylsulfonylacetylenes as Alkynylating Reagents of C sp 2H Bonds Activated with Lithium Bases
作者:José Luis García Ruano、José Alemán、Leyre Marzo、Cuauhtémoc Alvarado、Mariola Tortosa、Sergio Díaz-Tendero、Alberto Fraile
DOI:10.1002/anie.201107821
日期:2012.3.12
strategy for the synthesis of a wide variety of alkynyl derivatives by the reaction of substituted arylsulfonylacetylenes with organolithium species is described (see scheme). The high yields, the simplicity of the experimental procedure, the broad scope of this reaction, and the formation of CspCbonds without using transition metals are the main features of this methodology.
Sterically Controlled Late-Stage C–H Alkynylation of Arenes
作者:Arup Mondal、Hao Chen、Lea Flämig、Philipp Wedi、Manuel van Gemmeren
DOI:10.1021/jacs.9b10868
日期:2019.11.27
Phenylacetylenes are key structural motifs in organic chemistry, which find widespread applications in bioactive molecules, synthetic intermediates, functional materials and reagents. These molecules are typically prepared from pre-functionalized starting materials, e.g. using the Sonogashiracoupling, or using directing group-based C-H activation strategies. While highly efficient, these approaches
Preparation of conjugated 1,3-enynes by Rh(iii)-catalysed alkynylation of alkenes via C–H activation
作者:Karl D. Collins、Fabian Lied、Frank Glorius
DOI:10.1039/c4cc01141d
日期:——
An experimentally simple additive-free Rh(III)-catalysed direct alkynylation of alkenes has been developed. This protocol employs commercially available TIPS-EBX as the alkyne source, giving access to conjugated terminal enynes following a simple silyl-deprotection. This method has also been applied to arenes.