Cu(<scp>i</scp>) catalysis for selective condensation/bicycloaromatization of two different arylalkynes: direct and general construction of functionalized C–N axial biaryl compounds
enantioselectivity verifies its potential for the simplest asymmetric synthesis of atropoisomeric biaryls. Western blotting demonstrated that the newly developed compounds are promising targets in biology and pharmaceuticals. This unique reaction can construct structurally diverse C–N axial biarylcompounds that have never been reported by other methods, and might be extended to various applications in materials
A rhodium-catalysed Sonogashira-type coupling exploiting C–S functionalisation: orthogonality with palladium-catalysed variants
作者:Milan Arambasic、Manjeet K. Majhail、Robert N. Straker、James D. Neuhaus、Michael C. Willis
DOI:10.1039/c9cc00092e
日期:——
A rhodium(i) catalyst mediates selective and efficient coupling reactions between arylmethylsulfides and terminal alkynes to provide Sonogashira-like products.
Silver-catalysed/microwave-assisted domino reactions of 2-alkynyl-acetophenones and 3-acetyl-2-alkynylpyridines in the presence of ammonia are widely described. In most cases the reaction give a mixture of the imino- and carbo-cyclisation products, with a general preference for the former. A plausible mechanism is proposed and the dual activity of silver salts is supported by NMR experiments.
CuSO4·5H2O-catalyzed aminobenzannulation of ortho-alkynylaromatic ketones with anilines approach towards 1-aminonaphthalenes
作者:Biao Guo、Ruimao Hua
DOI:10.1016/j.tet.2016.06.036
日期:2016.7
An efficient catalyst system for the aminobenzannulation of ortho-alkynylaromatic ketones with amines affording substituted 1-aminonaphthalene derivatives with high atom-efficiency in the presence of CuSO4·5H2O was developed.
Copper-Catalyzed Intramolecular Oxidative 6-exo-trig Cyclization of 1,6-Enynes with H2O and O2
作者:Zhi-Qiang Wang、Wen-Wu Zhang、Lu-Bin Gong、Ri-Yuan Tang、Xu-Heng Yang、Yu Liu、Jin-Heng Li
DOI:10.1002/anie.201104082
日期:2011.9.12
The novel CuCl2‐catalyzed title reaction of enynes has been developed for synthesizing substituted naphthoquinones (see scheme; DMA=dimethylacetamide). The method represents the first example of a copper‐catalyzed enyne oxidative cyclization for constructing 1,4‐naphthoquinones by the incorporation of two oxygen atoms into the organic framework from molecular oxygen and water.