On the Diels–Alder reactions of pentadienyl maleates and citraconates
作者:Tory N. Cayzer、Michael J. Lilly、Rachel M. Williamson、Michael N. Paddon-Row、Michael S. Sherburn
DOI:10.1039/b501446h
日期:——
Reactions between conjugated dienols and maleic anhydride provide either cis-fused or trans-fused bicyclic products as major products, depending upon how the reaction is carried out. Simply mixing the two reactants together generally leads to cis-fused lactone acids in thermal reactions which proceed viaintermolecular Diels-Alderreaction followed by intramolecular esterification. Pre-forming the maleate