Memory of Chirality of Tertiary Aromatic Amide: Application to the Asymmetric Synthesis of (<i>S</i>)-α-MethylDOPA
作者:Thi Thoa Mai、Baby Viswambharan、Didier Gori、Cyrille Kouklovsky、Valérie Alezra
DOI:10.1021/jo301588t
日期:2012.10.5
We describe an original asymmetric synthesis of (S)-α-methylDOPA proceeding by the concept of memory of chirality, the only source of chirality being the starting d-alanine. The initial chirality of the amino acid is temporarily transferred to a dynamic axial chirality of a tertiary aromatic amide. The (S)-α-methylDOPA hydrochloride is obtained after four steps with 98% ee.
我们通过手性记忆的概念描述了(S)-α-甲基DOPA的原始不对称合成,手性的唯一来源是起始的d-丙氨酸。氨基酸的初始手性被暂时转移至叔芳族酰胺的动态轴向手性。(S)-α-甲基DOPA盐酸盐在四个步骤后以98%ee获得。