Asymmetric synthesis of 1-azaspiro[4.5]decanes via intramolecular dipolar cycloaddition of nitrones containing the bornane-10,2-sultam chiral auxiliary
作者:Mark C Bagley、Wolfgang Oppolzer
DOI:10.1016/s0957-4166(00)00205-6
日期:2000.6
3-dipolar cycloaddition of a cyclic nitrone, prepared by an asymmetricelectrophilicenolatehydroxyamination using the (2R)-bornane-10,2-sultam chiral auxiliary, proceeds to give bridged and fused cycloadducts with total diastereocontrol. Reduction of the fused isoxazolidine provides a 1-azaspiro[4.5]decane as a potential intermediate in the asymmetricsynthesis of the cylindricine alkaloids.