Silver Ion Promoted Rearrangement of 4-Aryl- and 4-Alkenyl-3-bromo-4,6-dimethyl-3,4-dihydro-2-pyrones

Article abstract of DOI:10.1021/jo00269a035

Debromination of 4-aryl- or 4-alkenyl-3-bromo-4,6-dimethyl-3,4-dihydro-2-pyrone 1 with AgSbF6 in CH2Cl2 or ClCH2CH2Cl induced migration of the aryl or alkenyl group, giving the corresponding 3-substituted 2-pyrones 2.A 2-hydroxypyrylium salt 3 was detecte