Chirality Preservation of a Cation-Radical Intermediate. Tandem Oxidative Ring Expansion-Cyclization Reaction of Optically Active Bicyclo[4.1.0]heptyl Sulfides
摘要:
Asymmetric synthesis of 1-oxaspiro[4.6]undecan-7-one and spiro[4.6]undecanes has been achieved by a regio- and stereoselective tandem oxidative ring expansion-cyclization reaction of chiral bicyclo[4.1.0]heptyl sulfides bearing an alcohol or electron-rich olefin in the C-6 side chain via a cation radical intermediate.