Regioselective Ring Opening of Di-isopropylsilylenes Derived from 1,3-Diols with Alkyl Lithium Reagents

Org Lett. 2015 Nov 6;17(21):5196-9. doi: 10.1021/acs.orglett.5b02529. Epub 2015 Oct 23.

Abstract

The selective alkyl lithium-induced ring opening of 1,3-di-isopropylsilylenes is described. The reaction affords a differentially substituted 1,3-diol bearing a silane that resides at the oxygen in the more sterically demanding position. The reaction can be highly selective with a regiochemical preference up to >50:1 and likely proceeds via an alkoxy-silane intermediate. This intermediate can by trapped by methyl iodide to provide the corresponding silyl methyl ether, wherein the silane again resides at the oxygen in the more sterically demanding position.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Alcohols / chemistry*
  • Indicators and Reagents
  • Lithium / chemistry*
  • Molecular Structure
  • Silanes / chemistry*
  • Stereoisomerism

Substances

  • Alcohols
  • Indicators and Reagents
  • Silanes
  • Lithium