Organocatalytic Diastereo- and Enantioselective Michael Addition Reactions of 5-Aryl-1,3-dioxolan-4-ones
作者:Peter S. Hynes、Daniela Stranges、Paul A. Stupple、Antonio Guarna、Darren J. Dixon
DOI:10.1021/ol070532l
日期:2007.5.1
derivatives and hexafluoroacetone have been identified as new and effective pro-nucleophiles in highly diastereo- and enantioselective Michael addition reactions to nitro olefins catalyzed by bifunctional epi-9-amino-9-deoxy cinchona alkaloid derivatives. Diastereoselectivities up to 98% and enantioselectivities up to 89% for a range of nitro olefins and 5-aryl-1,3-dioxolan-4-ones under mild reaction conditions
由扁桃酸衍生物和六氟丙酮衍生的5-Aryl-1,3-dioxolan-4-one杂环化合物在双官能epi-9-催化的对硝基烯烃的高度非对映和对映选择性的迈克尔加成反应中,已被确定为新的有效亲核试剂。氨基-9-脱氧金鸡纳生物碱衍生物。据报道,在温和的反应条件下,一系列硝基烯烃和5-芳基-1,3-二氧戊环-4-酮的非对映选择性高达98%,对映选择性高达89%。