Indium Triflate-Catalyzed Vinylation of β-Ketoesters with Acetylene Gas
摘要:
An ln(OTf)(3)-Catalyzed addition of a beta-ketoester to acetylene in the presence of molecular sieves produces a alpha-vinylated ketoester in good to excellent yield. The vinylation reaction proceeds without any loss of elements in starting molecules under solvent-free conditions and allows the use of welding-grade acetylene, providing a practical method for synthetic utilization of acetylene gas.
Indium Triflate-Catalyzed Vinylation of β-Ketoesters with Acetylene Gas
作者:Masaharu Nakamura、Kohei Endo、Eiichi Nakamura
DOI:10.1021/ol051057z
日期:2005.7.1
An ln(OTf)(3)-Catalyzed addition of a beta-ketoester to acetylene in the presence of molecular sieves produces a alpha-vinylated ketoester in good to excellent yield. The vinylation reaction proceeds without any loss of elements in starting molecules under solvent-free conditions and allows the use of welding-grade acetylene, providing a practical method for synthetic utilization of acetylene gas.
Radical 1,2,3-tricarbofunctionalization of α-vinyl-β-ketoesters enabled by a carbon shift from an all-carbon quaternary center
作者:Qi Zhang、Mong-Feng Chiou、Changqing Ye、Xiaobin Yuan、Yajun Li、Hongli Bao
DOI:10.1039/d2sc00902a
日期:——
enables further C–Cbondformation on the tertiary carbon intermediate with the aim of reconstructing a new all-carbon quaternary center. The good functional group compatibility ensures diverse synthetic transformations of this method. Experimental and theoretical studies reveal that the excellent diastereoselectivity should be attributed to the hydrogen bonding between the substrates and solvent.