Palladium-catalyzed C–H activation reactions directed by a removable 2-pyridylsulfinyl group were developed. Aromatic olefination products were formed in good yields on treatment of 2-(phenylsulfinyl)pyridines with alkenes in the presence of a Pd catalyst. The reaction tolerates a wide range of substituted alkenes, including various acrylates and styrenes. The controlled experiments indicated that
Palladium-catalyzed decarboxylative ortho-arylation of 2-pyridyl sulfoxides with benzoyl peroxides
作者:Meng Sun、Zhe Wang、Jiaxin Wang、Peiyu Guo、Xiangxiang Chen、Ya-Min Li
DOI:10.1039/c6ob02040b
日期:——
A palladium catalyzed efficient strategy for regio-selective ortho-arylation of sulfoxides with benzoylperoxides via decarboxylation has been developed. This reaction proceeds smoothly, tolerates a variety of functional groups, and provides easy access to the synthesis of different biaryl compounds.
Palladium-Catalyzed Coupling of Arene C–H Bonds with Methyl- and Arylboron Reagents Assisted by the Removable 2-Pyridylsulfinyl Group
作者:José A. Romero-Revilla、Alfonso Garcı́a-Rubia、Ramón Goméz Arrayás、M. Ángeles Fernández-Ibáñez、Juan C. Carretero
DOI:10.1021/jo2018137
日期:2011.11.18
The Pd-II-catalyzed direct coupling of arene C-H bonds with organoboron reagents assisted by the 2-pyridylsulfinyl group is reported. Methylboronic acid and arylboronic acid neopentyl esters proved to be efficient coupling partners, furnishing methylated arenes and biaryl products in moderate to good yields. The 2-pyridylsulfinyl group can be easily removed to provide the free biaryls. The essential role of the 2-pyridyl unit in stabilizing the cyclopalladation complex was demonstrated by X-ray diffraction analysis of the palladacycle intermediate.