The catalytic asymmetric intramolecular cyclopropanation (CAIMCP) of alpha-diazo-alpha-diphenylphosphoryl acetate has been investigated. The maximum ee of the CAIMCP was 91 and the absolute configuration of the two products was successfully determined. Our previously reported model to explain the enantiofacial selectivity of the reacting alkene was successfully applied to rationalize the enantioselectivity of the CAIMCP.
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