An efficient and convenient Cu(OAc)2/air mediated oxidative coupling of azoles via C–H activation
作者:Yan Li、Jun Jin、Weixing Qian、Weiliang Bao
DOI:10.1039/b919396k
日期:——
An efficient and convenient approach to construct CâC bonds at the 2-position of azoles via Cu(OAc)2/air mediated oxidative homo- and cross-coupling reaction was reported. The corresponding products were obtained in good to excellent yield.
Efficient synthesis of biazoles by aerobic oxidative homocoupling of azoles catalyzed by a copper(i)/2-pyridonate catalytic system
作者:Mingwen Zhu、Ken-ichi Fujita、Ryohei Yamaguchi
DOI:10.1039/c1cc15363c
日期:——
A highly efficient and convenient CuCl/2-pyridonate catalytic system for oxidativehomocoupling of azoles affording a biazole product has been developed. With this system, a variety of biazoles have been effectively synthesized in good to excellent yields in the presence of a very small amount of copper catalyst (1.0 mol%). It was feasible to employ air as a green oxidant.
Palladium-Catalyzed Regioselective Oxidative Coupling of Indoles and One-Pot Synthesis of Acetoxylated Biindolyls
作者:Zunjun Liang、Jinlong Zhao、Yuhong Zhang
DOI:10.1021/jo902265s
日期:2010.1.1
developed to achieve Pd-catalyzed homocoupling of indoles with excellent regioselectivity in the presence of Cu(OAc)2·H2O in DMSO at room temperature in high efficiency. This method provides a simple route to 2,3′-biindolyls from the electron-rich to moderately electron-poor indoles. The reaction tolerates the bromide substituent on indoles. In addition, a one-pot approach to C3-position acetoxylated biindolyls
Palladium-Catalyzed C-2 Selective Olefination of Thiazoles
作者:Wei Liu、Xin Yu、Chunxiang Kuang
DOI:10.1021/ol500542j
日期:2014.3.21
A highly efficient protocol for C2 selective alkenylation of electron-deficient thiazoles is developed. High C2 position selectivity for alkenylation products is achieved at a neutral environment, and a possible pathway of oxidative alkenylation is discussed. This methodology provides a simple way to construct a 2-alkenyl-thiazole moiety.
A General Method for Copper-Catalyzed Arene Cross-Dimerization
作者:Hien-Quang Do、Olafs Daugulis
DOI:10.1021/ja2047717
日期:2011.8.31
A generalmethod for a highly regioselective copper-catalyzed cross-coupling of two aromatic compounds using iodine as an oxidant has been developed. The reactions involve an initial iodination of one arene followed by arylation of the most acidicC-H bond of the other coupling component. Cross-coupling of electron-rich arenes, electron-poor arenes, and five- and six-membered heterocycles is possible