X=Y-ZH compounds as potential 1,3-dipoles. Part 43. Metal ion catalysed asymmetric 1,3-dipolar cycloaddition reactions of imines and menthyl acrylate

Article abstract of DOI:10.1016/0040-4020(94)00940-V

Metallo-azomethine ylides, generated from imines by the action of amine bases in combination with LiBr or AgOAc, undergo cycloaddition with both 1R, 2S, 5R- and 1S, 2R, 5S-menthyl acrylates at room temperature to give homochiral pyrrolidines in excellent