Kinetic and Theoretical Study of 4-<i>e</i><i>xo</i> Ring Closures of Carbamoyl Radicals onto CC and CN Bonds
作者:Gino A. DiLabio、Eoin M. Scanlan、John C. Walton
DOI:10.1021/ol047716+
日期:2005.1.1
Carbamoyl radicals were generated from oxime oxalate amides, and the kinetics of their 4-exo cyclizations onto C=C and C=NO bonds, leading to beta-lactam-containing species, were studied by EPR spectroscopy. DFT computations with model carbamoyl radicals predicted 4-exo ring closures onto C=NO bonds to be facile, especially when tert-butyl substituents were present. The reverse ring-opening reactions