Double axial chirality promoted asymmetric [2,3] Stevens rearrangement of N-cinnamyl <scp>l</scp>-alanine amide-derived ammonium ylides
作者:Eiji Tayama、Noriko Naganuma、Hajime Iwamoto、Eietsu Hasegawa
DOI:10.1039/c4cc02536a
日期:——
The base-induced asymmetric [2,3] Stevens rearrangement of N-cinnamyl tetraalkylammonium ylides derived from L-alanine amides proceeds via a double axially chiral intermediate to afford the corresponding alpha-substituted alanine derivatives with high enantio- and diastereoselectivities.
碱诱导的衍生自L-丙氨酸酰胺的N-肉桂基四烷基铵烷基化物的不对称[2,3] Stevens重排通过双轴向手性中间体进行,从而得到具有高对映异构和非对映异构选择性的相应α-取代的丙氨酸衍生物。