Tetrasubstituted Furans by Nucleophile-Induced Cleavage of Carbonyl Ylide–DMAD Cycloadducts
作者:Gerhard Maas、Matthias Dobesch、Julian Greiner
DOI:10.1055/s-0040-1707897
日期:——
Abstract Compounds incorporating a 4-aza-8-oxabicyclo[3.2.1]oct-6-en-2-one moiety, which were prepared by a tandem carbenoid carbonyl ylide cyclization/[3+2]-cycloaddition reaction from ethyl 2-diazo-3-oxo-4-phthalimidobutanoates, undergo a nucleophile-induced two-bond ring cleavage when treated with protic heteronucleophiles. In this manner, tetrasubstituted furantricarboxylates, tethered with α-amino
摘要 含有4-氮杂-8-氧杂双环[3.2.1] oct-6-en-2-one部分的化合物是通过串联二苯甲酰羰基内酯环化/ [3 + 2]-环加成反应从2-重氮乙基制得的当用质子异种亲核试剂处理时,-3-氧代-4-邻苯二甲酰亚胺基丁酸酯会经历亲核试剂诱导的双键环裂解。以此方式,获得了通过2-羰基苯基部分与α-氨基酸,酯,硫酯和酰胺束缚的四取代呋喃三羧酸酯。