Rhodium(III)-Catalyzed Azacycle-Directed Intermolecular Insertion of Arene C–H Bonds into α-Diazocarbonyl Compounds
作者:Xinzhang Yu、Songjie Yu、Jian Xiao、Boshun Wan、Xingwei Li
DOI:10.1021/jo400572h
日期:2013.6.7
Cp*Rh(III)-catalyzed intermolecular C C couplings between activated alpha-diazocarbonyl compounds and arenes bearing a range of azacyclic directing groups have been achieved. This catalytic alkylation reaction operates under mild conditions with good functional group tolerance.
Cp∗Co(III)-catalyzed direct functionalization of aromatic C–H bonds with α-diazomalonates
作者:Xu-Ge Liu、Shang-Shi Zhang、Jia-Qiang Wu、Qingjiang Li、Honggen Wang
DOI:10.1016/j.tetlet.2015.05.025
日期:2015.7
Cp*Co(III)-catalyzed intermolecular C(sp(2))-C(sp(3)) assembly of (hetero)arenes with alpha-diazomalonates using a direct C-H functionalization logic was developed. A series of (hetero)arenes underwent alkylation efficiently under the assistance of pyrazolyl and pyrimidyl directing groups under relatively mild and operationally simple reaction conditions. Good functional group tolerance, satisfactory yields, and excellent regioselectivity were found. (C) 2015 Elsevier Ltd. All rights reserved.
Cp*Co(<scp>iii</scp>)-catalysed selective alkylation of C–H bonds of arenes and heteroarenes with α-diazocarbonyl compounds
Cp*Co(III)-catalysed selective alkylation of directed C–H bonds of arenes and heteroarenes has been accomplished employing donor–acceptor carbenes, derived from α-diazocarbonyl compounds. The developed method allows ready access to various substituted α-(hetero)aryl-α-arylacetic acid derivatives in good to excellent yields. Synthetic utility was also shown through the synthesis of a substituted indole