SYNTHESIS OF 3-ARYL- OR 3-ALKENYL-4,6-DIMETHYL-2-PYRONES BY SILVER ION PROMOTED REARRANGEMENT OF 4-ARYL- OR 4-ALKENYL-3-BROMO-4,6-DIMETHYL-3,4-DIHYDRO-2-PYRONES

Article abstract of DOI:10.1016/S0040-4039(00)82125-5

Debromination of 4-aryl- or 4-alkenyl-3-bromo-4,6-dimethyl-3,4-dihydro-2-pyrone (1) with AgSbF6 in dichloromethane or 1,2-dichloroethane induced rearrangement of the aryl or alkenyl group to the 3-position to afford the corresponding 3-substituted 2-pyron