The Michael addition of 3-substituted oxindoles to nitroolefins was catalyzed by a novel tartrate-derived guanidine in high yield with excellent diastereo- and enantioselectivity. This method showed an extraordinarily broad substrate scope in terms of both reaction partners.
3-取代的氧
吲哚与硝基烯烃的迈克尔加成反应在一种新型的
酒石酸衍生的
胍的催化下,以高产率和优异的非对映选择性及手性选择性进行。该方法在反应底物方面显示出了极其广泛的适用性。