摘要:
The enantioselective reduction of N,S-heterocyclic imines, namely thiazolines la,b and 2H-1,4-benzothiazine Ic, via three different reduction methods is reported. The influence of reaction parameters, substituents, and the type of heterocycle was investigated. Reduction of the prochiral imines led to the corresponding amine derivatives 2, 10, 12 and 14. The best result was obtained by stoichiometric enantioselective reduction of Ic with 44% ee.