diastereoselectivity switch has been devised in the Fesulphos–CuI‐catalyzed glycine direct Mannich reaction with N‐(8‐quinolyl)sulfonyl imines by tuning the steric and electronic properties of the glycine component (see scheme). α,β‐Diamino acids of syn configuration are produced under high diastereo‐ and enantiocontrol with glycinate esters derived from electron‐deficient benzophenone‐type ketimines, in contrast
来来回回:通过调节甘
氨酸组分的空间和电子性质,在非
硫磷-Cu I催化的甘
氨酸直接曼尼希反应中与N-(8-
喹啉基)磺酰基
亚胺设计了非对映选择性开关。顺式构型的α,β-二
氨基酸是在高非对映体和对映体控制下,由缺乏电子的
二苯甲酮型酮
亚胺衍生的甘
氨酸酯生成的,与醛二胺衍生的亲核试剂形成反构型的产物相反。