Manganese(III)-promoted oxidative free-radical cyclizations of β-keto imides: Asymmetric induction with oppolzer's chiral sultam
作者:Philip A. Zoretic、Xiaoyu Weng、Christopher K. Biggers、Michael S. Biggers、Myron L. Caspar、Donald G. Davis
DOI:10.1016/s0040-4039(00)79045-9
日期:1992.5
Oxidativefree-radicalcyclization of the unsaturated β-keto imide 3 containing Oppolzer's D-camphor sultam as a chiral auxiliary was studied. Intramolecularly promoted oxidativefree-radicalcyclization of 3 with Mn (III) in the presence of Cu(II) produced the stereoisomeric cis-hydrindanones 4 and 5 in a 3:1 ratio at 250° C.