Un-substituted isocyanoacetate ethyl ester reacted with Michael acceptors 1a–m under the catalysis of Cinchona based quaternary ammonium salts providing imines 4a–m as a single diastereoisomer and in up to 94% ees.
未取代的
异氰酸乙酯与迈克尔受体1a-m在奎奴纳基四级
铵盐的催化下反应,形成
亚胺4a-m,作为单一对映异构体,其对映纯度高达94%。