3-BROMO-2-PYRONE: AN EASILY PREPARED CHAMELEON DIENE AND A SYNTHETIC EQUIVALENT OF 2-PYRONE IN THERMAL DIELS-ALDER CYCLOADDITIONS

Article abstract of DOI:10.1016/S0040-4039(00)92368-2

3-Bromo-2-pyrone, a stable solid prepared by a new route (eq. 1), has been found to undergo smooth and regiospecific 2+4-cycloadditions between 78-90 deg C with both electron-rich and electron-deficient dienophiles; subsequent high-yield reductive debromi