Synthesis of 2-methylidene-1-silacyclohexanes from 2,6-dibromohex-1-ene and polyhalosilanes
摘要:
Various 2-methylidene-l-silacyclohexanes were prepared by straightforward syntheses from readily available polychloro- or polyfluorosilanes, magnesium and 2,6-dibromohex-l-ene using Barbier-type conditions or a previously synthesized Grignard reagent. Good yields were obtained considering the low stability of the products in the reaction conditions. (c) 2006 Elsevier B.V. All rights reserved.
Synthesis of Unsaturated Silyl Heterocycles via an Intramolecular Silyl-Heck Reaction
作者:William B. Reid、Jesse R. McAtee、Donald A. Watson
DOI:10.1021/acs.organomet.9b00498
日期:2019.10.14
We report the synthesis of unsaturated silacycles via an intramolecular silyl-Heck reaction. Using palladium catalysis, silicon electrophiles tethered to alkenes cyclize to form 5- and 6-membered silicon heterocycles. The effects of alkene substitution and tether length on the efficiency and regioselectivity of the cyclizations are described. Finally, through the use of an intramolecular tether, the
Synthesis of 2-methylidene-1-silacyclohexanes by intramolecular hydrosilylation
作者:Silvia Díez-González、Luis Blanco
DOI:10.1016/j.jorganchem.2008.03.007
日期:2008.5
(hex-5-ynyl)silanes was achieved following two different synthetic approaches from readily available materials such as 4-bromobutene, 6-iodohexyne and chlorosilanes. Different reaction conditions for intramolecularhydrosilylation were tested to prepare the corresponding 2-methylidene-1-silacyclohexanes. Notably, the use of Speier’s catalyst allowed the regioselective formation of the desired products in moderate