Silyl Tosylate Precursors to Cyclohexyne, 1,2-Cyclohexadiene, and 1,2-Cycloheptadiene

Org Lett. 2020 Jun 5;22(11):4500-4504. doi: 10.1021/acs.orglett.0c01510. Epub 2020 May 21.

Abstract

Transient strained cyclic intermediates have become valuable intermediates in modern synthetic chemistry. Although silyl triflate precursors to strained intermediates are most often employed, the instability of some silyl triflates warrants the development of alternative precursors. We report the syntheses of silyl tosylate precursors to cyclohexyne, 1,2-cyclohexadiene, and 1,2-cycloheptadiene. The resultant strained intermediates undergo trapping in situ to give cycloaddition products. Additionally, the results of competition experiments between silyl triflates and silyl tosylates are reported.

Publication types

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

MeSH terms

  • Cycloaddition Reaction
  • Cycloheptanes / chemical synthesis*
  • Cycloheptanes / chemistry
  • Cyclohexenes / chemical synthesis*
  • Cyclohexenes / chemistry
  • Molecular Structure
  • Silanes / chemistry*
  • Stereoisomerism
  • Tosyl Compounds / chemistry*

Substances

  • Cycloheptanes
  • Cyclohexenes
  • Silanes
  • Tosyl Compounds