Absolute-configuration of N,N-((1s)-1-(1-methoxy-1-methyl)ethyltetramethylene)-(1r,6r,7r)-9,9-diethoxy-1-methyl-2-oxo-bicyclo4.3.0nonane-7-sulfonamide

摘要

The title compound, C22H39NO6S, is obtained by an intramolecular cyclization of the adduct resulting from the Michael addition of a chiral homoenolate to a cyclic alpha-enone. Its absolute stereochemistry is unambiguously established and this will provide an insight into the mechanism of the addition step of the reaction.