Enantioselective Protonation of Itaconimides with Thiols and the Rotational Kinetics of the Axially Chiral CN Bond
作者:Shishi Lin、Dasheng Leow、Kuo-Wei Huang、Choon-Hong Tan
DOI:10.1002/asia.200900331
日期:2009.11.2
the protonation reactions of 2‐phthalimidoacrylates with thiols in excellent yields and enantioselectivities. The protonation reaction of itaconimides with secondary phosphine oxides is also known. Herein, the tandem conjugate addition–enantioselective protonation of N‐substituted itaconimides with thiols catalyzed by chiral bicyclic guanidine is investigated. The rotational barrier of the CN axis
双环胍能够以优异的收率和对映选择性催化2-邻苯二甲酰亚胺基丙烯酸酯与硫醇的质子化反应。衣康酰亚胺与仲膦氧化物的质子化反应也是已知的。本文研究了手性双环胍催化N-取代的衣康酰亚胺与巯基的串联共轭加成-对映选择性质子化反应。的C的旋转阻挡的N轴Ñ -2-叔丁基phenylitaconimide还研究,实验和计算。