N-Heterocyclic Carbene-Catalyzed α,β-Unsaturated Aldehydes Umpolung in Fullerene Chemistry: Construction of [60]Fullerene-Fused Cyclopentan-1-ones and Cyclohex-2-en-1-ones
作者:Beibei Hu、Tong-Xin Liu、Pengling Zhang、Qingfeng Liu、Jingjing Bi、Lei Shi、Zhiguo Zhang、Guisheng Zhang
DOI:10.1021/acs.orglett.8b01956
日期:2018.8.17
first umpolung strategy for the cycloacylation of fullerene using a N-heterocyclic carbene organocatalyst is reported. The coupling of [60]fullerene with different structural α,β-unsaturated aldehydes efficiently furnishes interesting [60]fullerene-fused cyclopentan-1-ones or cyclohex-2-en-1-ones in good to excellent yields. This new reaction displays a wide substrate scope and excellent functional-group
报道了使用N-杂环卡宾有机催化剂对富勒烯进行环酰化的第一个整体策略。[60]富勒烯与不同结构的α,β-不饱和醛的偶联有效地提供了有趣的[60]富勒烯稠合的环戊烷-1-酮或环己-2-烯-1-酮,产率高至优异。该新反应显示出广泛的底物范围和优异的官能团耐受性,并且可以通过使用相应的烯醛来安装各种取代基,例如芳基,杂芳基,烯基,烷基和酯。