Diastereoselective addition of chiral azomethine ylides to cyclic α,β-unsaturated N-enoylbornanesultams
作者:Staffan Karlsson、Hans-Erik Högberg
DOI:10.1039/b200579d
日期:2002.4.9
Doubly diastereoselective1,3-dipolarcycloaddition reactions of chiral non-racemic azomethine ylides to cyclic five- and six-membered α,β-unsaturated N-enoylbornanesultams were carried out. When suitable solvents were used, the fused bicyclic adducts formed were obtained in good diastereoselectivity. Moreover, a change of the absolute configuration of the starting ylide precursor reversed the diastereoselectivity