We have presented the first palladium(II)‐thiadiazole‐ligand catalytic system, employing 1,3,4‐thiadiazole derivative as ligand to achieve the esterification of terminal olefin with excellent regio‐ and stereoselectivity. This work is significant in that it represented the first application of 1,3,4‐thiadiazole in organic synthesis. Furthermore, it was also featured by its satisfied yields, mild reaction
Copper-Catalyzed Dehydrogenative Cross-Coupling Reactions of N-para-Tolylamides through Successive CH Activation: Synthesis of 4H-3,1-Benzoxazines
作者:Tao Xiong、Yan Li、Xihe Bi、Yunhe Lv、Qian Zhang
DOI:10.1002/anie.201101391
日期:2011.7.25
A novel annulation reaction of readily available tolylamides was catalyzed by Cu(OTf)2 in the presence of Selectfluor and water through successive intermolecular CH activated dehydrogenativecross‐coupling reactions of benzylic methyl C(sp3)H and aromatic C(sp2)H bonds, and subsequent intramolecular CO bond formation (see scheme).
Synthesis of 2-Pyridones and Iminoesters via Rh(III)-Catalyzed Oxidative Coupling between Acrylamides and Alkynes
作者:Yan Su、Miao Zhao、Keli Han、Guoyong Song、Xingwei Li
DOI:10.1021/ol102306c
日期:2010.12.3
Catalytic oxidative coupling between acrylamides and alkynes was achieved using 0.5 mol % loading of [RhCp*Cl-2](2) with Cu(OAc)(2) as an oxidant. 2-Pyridones, iminoesters, and substituted indoles could be obtained as a result of the electronic and steric effects of the substituents in the acrylamides.