Unexpected rearrangement of intramolecular Diels-Alder adducts of citraconic anhydride and secondary furfuryl amines
作者:Rajappa Murali、Hans W. Scheeren
DOI:10.1016/s0040-4039(99)00316-0
日期:1999.4
The intramolecular Diels-Alder reactions of citraconic anhydride with several secondary furfuryl amines have been studied at different temperatures. At high temperatures, only a single cycloadduct was isolated, whilst at room temperature, a mixture of two regioisomeric adducts were formed. One of the regioisomers rearranged to another when heated in a solvent. Some aspects of the mechanism were investigated