The chiral ligand controlled asymmetric conjugate addition reaction of lithium N-allyl-N-(tert-butyldimethylsilyl)amide to alkenoates proceeded smoothly to give, after protodesilylation, the corresponding 3-allylaminoalkanoates with high enantioselectivities in high yields. The allyl group on the nitrogen atom was easily removable to afford 3-aminoalkanoates.
手性
配体催化的
锂N-烯丙基-N-(叔丁基二甲基
硅基)胺与烯酯的非对称共轭加成反应顺利进行,经过脱
硅化处理后,得到相应的3-烯丙基
氨基烷酸酯,具有高的对映选择性和高的产率。氮原子上的烯丙基很容易被去除,从而获得3-
氨基烷酸酯。