Asymmetric synthesis of conformationally constrained L-AP4 analogues using chiral sulfinyl auxiliary
作者:Wanda H. Midura、Jerzy Krysiak、Aneta Rzewnicka、Anna Supeł、Piotr Łyżwa、Ashraf M. Ewas
DOI:10.1016/j.tet.2012.10.085
日期:2013.1
-phenylcyclopropyl) glycine (PPCG-2) were synthesized. The stereogenic centers in cyclopropane ring were formed under sulfinyl group control, in asymmetric cyclopropanation of enantiomerically pure α-phosphoryl vinyl sulfoxides. The sulfinimine-mediated asymmetric Strecker reaction allowed to introduce amino acid moiety.
约束L-AP4类似物,(2小号,1' - [R,2'小号) -和(2小号,1'小号,2' - [R)-2-(2'- phosphonocyclopropyl)甘氨酸以及它们的类似物的苯基(2-小号,1'小号,2' - [R,3'小号)-2-(2'-膦酰基-3'-苯基环丙基)甘氨酸(PPCG-1)和(2小号,1' - [R,2'小号,3' - [R合成了)-2-(2'-膦基-3'-苯基环丙基)甘氨酸(PPCG-2)。环丙烷环中的立体异构中心是在亚磺酰基基团的控制下,对映体纯的α-磷酰基乙烯基亚砜的不对称环丙烷化反应中形成的。亚氨基亚胺介导的不对称Strecker反应允许引入氨基酸部分。