期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 58, 期 1, 页码 322-326出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201811998
关键词
C-H activation; desymmetrization; heterocycles; rhodium; synthetic methods
资金
- NSFC [21525208, 21472186]
- SNNU
Chiral rhodium(III) cyclopentadienyl catalysts ((CpRhIII)-Rh-X) play significant roles in asymmetric arene C-H activation. Rh/Ir-catalyzed couplings of arenes and strained rings have been well-studied, but they have been limited to racemic systems. Reported in this work is the (CpRhIII)-Rh-x/AgSbF6-catalyzed enantioselective desymmetrizative C-C coupling of N-pyrimidylindoles and 7-azabenzonorbornadienes with high efficiency and enantioselectivity. The role of AgSbF6 has been established by mechanistic studies. AgSbF6 enhances the catalytic activity by suppressing the C3-H activation of the indoles, activation which would otherwise lead to catalytically inactive species.
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