Rhodium-Catalyzed Carbonylative Synthesis of Benzosilinones
作者:Bo Chen、Xiao-Feng Wu
DOI:10.1021/acs.orglett.9b00930
日期:2019.4.19
In this work, a novel and practical procedure for the synthesis of benzosilinones by carbonylative cyclization has been developed. Various benzosilinones were isolated in moderate to good yields, using rhodium as the catalyst with good functional group tolerance. Not only symmetric alkynes but also nonsymmetric alkynes are applicable with excellent regioselectivity and good yields. Remarkably, this
Bis[o-(hydrosilyl)phenyl]cuprates and bis[o-(fluorosilyl)phenyl]cuprates were prepared by reacting [o-(hydrosilyl)phenyl]lithiums and [o-(fluorosilyl)phenyl]lithiums, respectively, with copper salts, such as CuCN and Cu(OPiv)2. The phenylcuprates underwent oxidative coupling to afford 2,2′-bis(hydrosilyl)biphenyls and 2,2′-bis(fluorosilyl)biphenyls.
A reaction sequence of 2‐(diphenylsilyl)phenylation by Negishi coupling and intramolecular sila‐Friedel–Crafts reaction has been explored for the synthesis of mono‐triphenylsilane‐fused porphyrins 5 M and 6 M (M= Ni, Zn) and bis‐triphenylsilane‐fused porphyrins 7 M and 8 Ni. A triply linked triphenylsilane‐fused NiII porphyrin, 13 Ni, was synthesized in a stepwise manner involving the above reaction