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.