Further Studies on the Direct Synthesis of<i>α</i>,<i>β</i>-Unsaturated Ketimines and<i>α</i>,<i>β</i>-Enones by Chemoselective Dehydrative Addition of Functionalized Alkenes to Secondary Amides
作者:Pei-Qiang Huang、Ying-Hong Huang
DOI:10.1002/cjoc.201600700
日期:2017.5
including ester, α,β‐unsaturated ester, uncongested ketone groups, as well as enol derivatives of acetaldehyde such as enol ether and enamides. The electrophilic partner has been extended from N‐(2,6‐dimethylphenyl) and N‐methyl amides to N‐n‐butyl, and N‐cyclohexyl amides. The results demonstrated that the method can be used to synthesize a number of functionalized α,β‐unsaturated ketimines and α,β‐enones
本文描述的是对C-H烷基亚氨基化和烯烃与仲酰胺酰化的扩展研究的结果。亲核伴侣已扩展至涵盖一系列带有官能团的官能化烯烃,这些官能团包括酯,α,β-不饱和酯,未拥挤的酮基以及乙醛的烯醇衍生物,例如烯醇醚和酰胺。亲电子分子已从N-(2,6-二甲基苯基)和N-甲基酰胺扩展到N-正丁基和N-环己基酰胺。结果表明,该方法可用于合成许多功能化的α,β有效,高产且单锅方式的不饱和酮亚胺和α,β烯酮。该方法用于(E)-6-苯乙烯基四氢-2 H-吡喃-2-酮(5)的简明合成中,该中间体是一系列苯乙烯基内酯天然产物的直接中间体,包括(±)-goniothalamine(6),(±)-邻苯二酚氧化胺(7),(±)-邻苯二酚(8),(±)-leiocarpin A(9),(±)-9-脱氧goniopypyrone(10)和(±)-7- Epi gon二醇(11)。