Diels-Alder Reactions of 6-Substituted 1-(p-Nitrobenzoyl)-5,6-dihydro-2-pyridinones
作者:Luiz C. Dias、Anna M. A. P. Fernandes、J. Zukerman-Schpector
DOI:10.1055/s-2002-19344
日期:——
The first examples of Diels-Alder cycloaddition reactions of 6-substituted 1-(p-nitrobenzoyl)-5,6-dihydro-2-pyridinones are described. This reaction benefits from the fact that the diene adopts an endo orientation trans to the axial substituent at C-6 due to A 1 , 3 allylic type strain with the N-PNB protecting group.
描述了 6-取代的 1-(对-硝基苯甲酰基)-5,6-二氢-2-吡啶酮的 Diels-Alder 环加成反应的第一个例子。该反应受益于以下事实:由于具有 N-PNB 保护基团的 A 1, 3 烯丙基型应变,二烯在 C-6 处采用与轴向取代基反式的内向取向。