Copper-catalyzed decarboxylative cross-coupling of propiolic acids and terminal alkynes
作者:Miao Yu、Delin Pan、Wei Jia、Wei Chen、Ning Jiao
DOI:10.1016/j.tetlet.2009.12.138
日期:2010.3
A copper-catalyzed decarboxylative cross-coupling reaction of propiolic acids with terminal alkynes is developed leading to unsymmetric 1,3-conjugated diynes under mild conditions. This method provides a novel decarboxylative cross-coupling for sp-sp bond formation. Compared to organic halides, only carbon dioxide is produced as by-products in this approach.
Rapid access to unsymmetrical 1,3-diynes and 2,5-disubstituted thiophenes under ligand and Pd/Ni-free Cu-catalysis
作者:Maddali L. N. Rao、Sk Shamim Islam、Priyabrata Dasgupta
DOI:10.1039/c5ra15705f
日期:——
A Pd/Ni-free copper-catalysed tandem synthesis was realized for rapid access to unsymmetrical 1,3-diynes from 1,1-dibromoalkenes and terminal alkynes. This method was extended to the straightforward synthesis of unsymmetrical 2,5-disubstitutedthiophenes in a one-pot operation.