NHC-mediated cross-coupling of sugar-derived cyclic nitrones with enals: general and efficient synthesis of polyhydroxylated pyrrolizidines and indolizidines
作者:Wen-Yuan Xu、Ren Iwaki、Yue-Mei Jia、Wei Zhang、Atsushi Kato、Chu-Yi Yu
DOI:10.1039/c3ob40696b
日期:——
the synthesis of polyhydroxylated pyrrolizidines and indolizidines has been developed based on the NHC-catalyzed cross-coupling of sugar-derived cyclic nitrones with enals, which afforded the key intermediates, γ-hydroxyl amino esters, in good to excellent yields. Thus, a variety of polyhydroxylated pyrrolizidines and indolizidines have been synthesized and assayed against various glycosidases, which
基于糖衍生的环硝酮与NHC的NHC催化偶联,已经开发了一种通用且有效的合成多羟基吡咯烷核苷和吲哚唑烷的方法,该方法提供了关键中间体γ-羟基氨基酯,优良至优良。产量。因此,已经合成了多种多羟基化的吡咯烷核苷和吲哚并核苷,并针对各种糖苷酶进行了测定,结果表明,吡咯烷核苷的C-7或吲哚并核苷的C-8处的芳基或烷基取代基降低了对这些双环亚氨基糖的糖苷酶抑制的能力。