Bifunctional iminophosphorane superbases: Potent organocatalysts for enantio- and diastereoselective Michael addition reactions
作者:Alistair J.M. Farley、Pavol Jakubec、Anna M. Goldys、Darren J. Dixon
DOI:10.1016/j.tet.2018.06.021
日期:2018.9
iminophosphorane (BIMP) organocatalysts catalyze the enantio- and diastereoselective Michaeladditions of high pKa cyclic malonamate ester pro-nucleophiles to nitroalkenes with reactivity profiles of up to 3 orders of magnitude greater than tertiary amine bifunctional Brønsted base/(thio)urea organocatalysts. The unrivalled performance of the BIMPs allows reaction times of challenging reactions to be slashed
双官能亚氨基膦烷(BIMP)有机催化剂催化高p K a环丙二酸酯优先亲核体向硝基烯烃的对映和非对映选择性Michael加成,其反应活性比叔胺双官能布朗斯台德碱/(硫代)脲有机催化剂高多达3个数量级。 。BIMP的无与伦比的性能使具有挑战性的反应的反应时间从数周缩短到数分钟,并且使用流动反应器中包含的聚苯乙烯支持的变体,可以在新的流动化学应用中使用。