A simple protocol for performing chromium-catalyzed highly diastereoselective alkylations of arylmagnesium halides with cyclohexyl iodides at ambient temperature has been developed. Furthermore, this ligand-free CrCl2 enables efficient electrophilic alkenylations of primary, secondary and tetiary alkylmagnesium halides with readily available alkenyl acetates. Moreover, this chemoselective C‒C coupling
METHOD FOR PRODUCING MULTISUBSTITUTED BIPHENYL COMPOUND AND SOLID CATALYST TO BE USED THEREIN
申请人:KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
公开号:US20150274689A1
公开(公告)日:2015-10-01
A method for producing a multisubstituted biphenyl compound is represented by the following formula (2), including a step of coupling a substituted benzene compound represented by the following formula (1) in the presence of a solid catalyst with gold immobilized onto a support.
formation of homocoupled alkane byproducts have been identified in the reduction of bromoalkanes via photoredoxgold catalysis with dimeric Au(I) complexes. This prompted further investigation into the mechanism of formation of these byproducts and the diversity of C–X bonds amenable to this transformation. Examples were found when considering bromoalkanes while a wide variety of iodoarenes underwent this
Iridium-Promoted, Palladium-Catalyzed Direct Arylation of Unactivated Arenes
作者:Landon J. Durak、Jared C. Lewis
DOI:10.1021/om401221v
日期:2014.2.10
Examining the scope of this reaction led to the discovery that Cp*(PMe3)IrMeCl activates C–H bonds on arene substrates that undergo subsequent Pd-catalyzed cross-coupling with aryl iodides. This Ir-promoted, Pd-catalyzed directarylation is notable for its distal selectivity on substituted arenes lacking directing groups or a particular electronic bias.