摘要:
Organolanthanum reagents[RLaCl2] generated in situ from LaCl3 and alkyl lithium or allyl magnesium could undergo a highly regioselective 1,2-addition to N-alkyl alpha,beta-unsaturated imines, which provided a new and useful approach to synthesize allyl amines with good yields and high regioselectivity. Furthermore, for N-chiral alkyl alpha,beta-unsaturated imine, in the case of n-butyl lithium, the diastereoselectivity achieved highly 90%. (C) 1997 Elsevier Science S.A.