Facile coupling of propargylic, allylic and benzylic alcohols with allylsilane and alkynylsilane, and their deoxygenation with Et3SiH, catalyzed by Bi(OTf)3 in [BMIM][BF4] ionic liquid (IL), with recycling and reuse of the IL
作者:G. G. K. S. Narayana Kumar、Kenneth K. Laali
DOI:10.1039/c2ob26046h
日期:——
substituted propargylicalcohol 1e with allyl-TMS gave the skeletally intact 1,5-enyne and a ring opened derivative as a mixture. Coupling of propargylic/allylic alcohol 1f with allyl-TMS resulted in allylation at both benzylic (2 isomers) and propargylic positions, as major and minor products respectively. The scope of this methodology for allylation of a series of allylic and benzylic alcohols was explored
stable allenyl, propargyl, or allyl-propargyl hybrid cations have been developed. These carbocations could be generated from silyl 1-(pi-donor)-substituted propargylethers by the action of trimethylsilyl trifluoromethanesulfonate in dichloromethane at -78 degrees C to room temperature and could be attacked nucleophilically by electron rich arenes, allylsilanes, or enol silyl ethers, giving rise to
Gold-catalyzed nucleophilicsubstitution on propargylicalcohols, with various C-, O-, and S-nucleophiles, is described under very mild conditions (room temperature, dichloromethane) in 0-97% yield.
A General and Efficient FeCl<sub>3</sub>-Catalyzed Nucleophilic Substitution of Propargylic Alcohols
作者:Zhuang-ping Zhan、Jing-liang Yu、Hui-juan Liu、Yuan-yuan Cui、Rui-feng Yang、Wen-zhen Yang、Jun-ping Li
DOI:10.1021/jo061234p
日期:2006.10.1
A general and efficient FeCl3-catalyzed substitution reaction of propargylicalcohols with carbon- and heteroatom-centered nucleophiles such as allyl trimethylsilane, alcohols, aromatic compounds, thiols, and amides, leading to the construction of C−C, C−O, C−S and C−N bonds, has been developed.
BiCl3-Catalyzed propargylic substitution reaction of propargylic alcohols with C-, O-, S- and N-centered nucleophiles
作者:Zhuang-ping Zhan、Wen-zhen Yang、Rui-feng Yang、Jing-liang Yu、Jun-ping Li、Hui-juan Liu
DOI:10.1039/b606470a
日期:——
A general and efficient BiCl3-catalyzed substitution reaction of propargylic alcohols with carbon and heteroatom-centered nucleophiles such as allyl trimethylsilane, alcohols, aromatic compounds, thiols and amides, leading to the construction of C–C, C–O, C–S and C–N bonds, has been developed.