Synthesis of Borylcyclopropanes by Chromium-Promoted Cyclopropanation of Unactivated Alkenes

Masahito Murai, Chisato Mizuta, Ryuji Taniguchi, Kazuhiko Takai

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)


The combination of diiodomethylboronate ester, CrCl2 with TMEDA promoted borylcyclopropanation of unactivated alkenes under mild conditions. Compared with the typical Simmons-Smith cyclopropanation, the current protocol offers the following advantages: (1) the reaction proceeds stereoselectively with disubstituted alkenes even without hydroxy or alkoxy groups; (2) both electron-rich and electron-deficient alkenes can be applicable; and (3) the reaction does not require potentially flammable alkylzinc. These unique reactivity features result from the steric and electronic nature of the gem-dichromiomethane intermediates.

Original languageEnglish
Pages (from-to)6104-6107
Number of pages4
JournalOrganic Letters
Issue number22
Publication statusPublished - Nov 17 2017

ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry


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