The hydroboration of silylacetylenes. The "silyl-Markovnikov" hydroboration route to pure (Z)-1-(2-borylvinyl)silanes and .beta.-keto silanes
作者:John A. Soderquist、Juan C. Colberg、Luis Del Valle
DOI:10.1021/ja00195a046
日期:1989.6
complete characterization of the intermediate organoboranes by 75-MHz sup13}C NMR wasmore » achieved. A detailed discussion of the phenomena involved is presented. The observed results are attributed primarily to the additional steric effects imposed on an unsaturated system by a trialkylsilyl group when compared to a hydrogen atom at that position.« less
Asymmetric Total Synthesis of Solandelactone E: Stereocontrolled Synthesis of the 2-ene-1,4-diol Core through a Lithiation-Borylation-Allylation Sequence
作者:Anna Robinson、Varinder K. Aggarwal
DOI:10.1002/anie.201003236
日期:2010.9.3
A highly stereoselective, 13‐step synthesis of solandelactone E is reported which employs the lithiation–borylation–allylation sequence as the key step (see scheme). This synthetic method solves the problem of poor stereocontrol at C11 that had dogged many previous syntheses of this class of molecules.
2-Trimethylsilylvinylboranes: highly reactive and selective diels-alder equivalents of 2-trimethylsilylvinyl alcohol and acetylene
作者:Daniel A Singleton、Jose P Martinez
DOI:10.1016/0040-4039(91)80108-i
日期:1991.12
The readily available 2-trimethylsilylvinyl-9-BBN (1) is a highlyreactive and selective dienophile. The Diels-Alder products are easily converted into trimethylsilylcyclohexenols and 1,4-cyclohexadienes.
Trans-3-silyl allylic alcohols via the brown vinylation
作者:Anil M. Rane、Jaime Vaquer、Juan C. Colberg、John A. Soderquist
DOI:10.1016/0040-4039(94)02422-8
日期:1995.2
The addition of representative aldehydes to trans-vinylborane 1 provided pure trans-3-silylallylicalcohols 2 in excellent yields. The combination of dehydroborylation and insertion leads to the novel dihydroisobenzofuran 7.