Cycloaddition reaction of methyl 2-pyronecarboxylates with 1,3-dienes

Article abstract of DOI:10.1016/0040-4020(78)80094-5

The experimental results of thermal cycloaddition reactions of methyl 2-pyrone-3-, 4-, 5- and 6-carboxylates with 1,3-dienes and the theoretical approach by a second order perturbation MO method are described. The sequential introduction of a methoxycarbo