Stereoselective Synthesis of (<i>Z</i>)-α,β-Unsaturated Ketones via Hydromagnesiation of Alkynylsilanes
作者:Hong Zhao、Ming-Zhong Cai
DOI:10.1081/scc-120018925
日期:2003.1.6
Abstract Hydromagnesiation of alkynylsilanes 1 gives (Z)-α-silylvinyl Grignard reagents 2, which are treated with alkyl iodides in the presence of CuI to give (Z)-1,2-disubstituted vinylsilanes 3 in high yields. Intermediates 3 can undergo the Friedel–Crafts acylation reactions with acyl chlorides to afford (Z)-α,β-unsaturated ketones in good yields with high stereoselectivity.
Alkylation of 1-trimethylsilylvinyl aluminates with “unreactive” alkyl halides mediated by cuprous iodide-trimethyl phosphite complex
作者:Frederick E. Ziegler、Koichi Mikami
DOI:10.1016/s0040-4039(00)99821-6
日期:1984.1
Cuprous iodide-triethyl phosphite complex was found to be effective as a catalytic or equimolar reagent for the alkylation of 1-trymethylsylylvinyl aluminates with “unreactive” alkyl halides.
Stereoselective synthesis of vinylsilanes from alkynylsilanes by reductive alkylation via hydroboration and carbodemetalation
作者:Keiichiro Uchida、Kiitiro Utimoto、Hitosi Nozaki
DOI:10.1021/jo00879a039
日期:1976.8
Insertion of metallated epoxides into zirconacycles
作者:Alexander N. Kasatkin、Richard J. Whitby
DOI:10.1016/s0040-4039(00)00805-4
日期:2000.7
Metallated epoxides (epoxysilanes, epoxynitriles, epoxystyrene) insert efficiently into zirconacycles via a 1,2-metallate rearrangement to form intermediates which eliminate Cp2Zr(R)O- to afford substituted alkenes. (C) 2000 Elsevier Science Ltd. All rights reserved.