The first example of regiospecific magnesium carbenoid 1,3-CH insertion: its mechanism and stereochemistry

Shingo Ogata, Shigeyuki Masaoka, Ken Sakai, Tsuyoshi Satoh

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Addition reaction of two geometrical isomers of 1-chlorovinyl p-tolyl sulfoxides, derived from unsymmetrical ketones and chloromethyl p-tolyl sulfoxide, with lithium enolate of tert-butyl acetate gave single isomers of the adduct, respectively. Treatment of each diastereomer with i-PrMgCl resulted in the formation of magnesium carbenoids. Highly regiospecific 1,3-CH insertion reaction was found to take place from the magnesium carbenoids to afford cyclopropanes in high yields. Stereochemistry of the adducts, reaction mechanism, and origin of the regiospecificity are discussed.

Original languageEnglish
Pages (from-to)5017-5021
Number of pages5
JournalTetrahedron Letters
Issue number29
Publication statusPublished - Jul 16 2007


All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Drug Discovery
  • Organic Chemistry

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