Room-Temperature C–H Arylation: Merger of Pd-Catalyzed C–H Functionalization and Visible-Light Photocatalysis
作者:Dipannita Kalyani、Kate B. McMurtrey、Sharon R. Neufeldt、Melanie S. Sanford
DOI:10.1021/ja208068w
日期:2011.11.23
This communication describes the development of a room-temperature ligand-directed C-H arylation reaction using aryldiazoniumsalts. This was achieved by the successful merger of palladium-catalyzed C-H functionalization and visible-lightphotoredoxcatalysis. The new method is general for a variety of directing groups and tolerates many common functional groups.
The Rh(I)-catalyzed direct reorganization of organic frameworks and group exchanges between carboxylic acids and aryl ketones was developed with the assistance of directinggroup. Biaryls, alkenylarenes, and alkylarenes were produced in high efficiency from aryl ketones and the corresponding carboxylic acids by releasing the other molecule of carboxylic acids and carbon monoxide. A wide range of functional
Efficient rhodium(I)-catalyzed regioselective direct arylation and alkenylation of aromatic C−H bonds has been realized with aromatic carboxylic and cinnamic anhydrides as the coupling partners via decarbonylation and C−H activation under phosphine-free conditions.
Extrusion of CO from Aryl Ketones: Rhodium(I)-Catalyzed CC Bond Cleavage Directed by a Pyridine Group
作者:Zhi-Quan Lei、Hu Li、Yang Li、Xi-Sha Zhang、Kang Chen、Xin Wang、Jian Sun、Zhang-Jie Shi
DOI:10.1002/anie.201107136
日期:2012.3.12
The rhodium(I)‐catalyzed extrusion of carbon monoxide from biaryl ketones and alkyl/alkenyl arylketones was developed to produce biaryls and alkyl/alkenyl arenes, respectively, in high yields (see scheme). A wide range of functionalities are tolerated. Not only does this method provide an alternative pathway to construct useful scaffolds, but also offers a new strategy for CCbond activation.
Rhodium-Catalyzed Regioselective C−H Functionalization via Decarbonylation of Acid Chlorides and C−H Bond Activation under Phosphine-Free Conditions
作者:Xiaodan Zhao、Zhengkun Yu
DOI:10.1021/ja803154h
日期:2008.7.1
Efficient rhodium(I)-catalyzed regioselective functionalization of aromatic C-H bonds has been realized with acid chlorides as the coupling partners via decarbonylation and C-H activation under phosphine-free conditions.