Stereoselective synthesis of syn- and anti-1,3- and 1,2-dimethyl arrays via asymmetric conjugate additions

Asymmetric conjugate additions have been investigated with enantiopure N-enoyloxazolidinones for efficient construction of syn and anti-1,3-dimethyl arrays on an acyclic carbon backbone. Reactions of Yamamoto organocopper species exhibit characteristics of double asymmetric induction resulting from influences of the 4-substituted chiral auxiliary and features of side chain stereochemistry.