Synthesis of Silicon Substituted Cyclopropylmethyl Alcohols in Optically Active Form<i>via</i>Asymmetric Simmons-Smith Reaction of γ-Silicon Substituted Allylic Alcohols
作者:Yutaka Ukaji、Kazunori Sada、Katsuhiko Inomata
DOI:10.1246/cl.1993.1227
日期:1993.7
Optically active silicon substituted cyclopropylmethyl alcohols were synthesized through asymmetricSimmons-Smithreaction; that is, the reaction of γ-silicon substituted allylic alcohols with diethylzinc and diiodomethane utilizing (+)-diethyl tartrate as a chiral auxiliary was found to afford the corresponding silicon substituted cyclopropylmethyl alcohols with high stereoselectivity up to 92% ee
Uniting Anion Relay Chemistry with Pd-Mediated Cross Coupling: Design, Synthesis and Evaluation of Bifunctional Aryl and Vinyl Silane Linchpins
作者:Amos B. Smith、Won-Suk Kim、Rongbiao Tong
DOI:10.1021/ol902784q
日期:2010.2.5
Union of type II AnionRelayChemistry (ARC) with Pd-induced Cross Coupling Reactions (CCR) has been achieved, in conjunction with the design, synthesis, and evaluation of a new class of bifunctionallinchpins, comprising a series of vinyl silanes bearing β- or γ-electrophilic sites. The synthetic tactic permits both alkylation and Pd-mediated CCR of the anions derived via 1,4-silyl C(sp2)→O Brook
Stereoselective synthesis of vinylsilanes from alkynylsilanes by reductive alkylation via hydroboration, transmetallation and carbodemetallation
作者:K. Uchida、K. Utimoto、H. Nozaki
DOI:10.1016/0040-4020(77)88034-4
日期:1977.1
Hydroboration of 1-trimethylsilyl-1-alkynes with dicyclohexylborane gives 1-trimethylsilylvinylboranes regio- and stereoselectively whose successive treatment with methyllithium, cuprous iodide and alkyl halides affords (Z)-1,2-dialkylvinylsilanes in high yields. Functionalized 1-trimethylsilyl-1-alkynes give analogous results. Successive treatment of the intermediary 1-trimethylsilylvinylboranes with
CLEAVAGE OF VINYL CARBON–SILICON BOND IN γ-TRIMETHYLSILYL ALLYLIC ALCOHOLS
作者:M. I. Al-Hassan、R. B. Miller
DOI:10.1081/scc-100107013
日期:2001.1
Cleavage of the vinyl carbon–siliconbond by fluoride ion requires a free hydroxyl group located in such a position that stable cyclic transition state can be attained.