HETEROCYCLIC SYNTHESES WITH ALLENE-1,3-DICARBOXYLIC ESTERS AND ACIDS : NEW CHROMENE, CHROMONE, QUINOLONE, α-PYRONE AND COUMARIN SYNTHESES

Article abstract of DOI:10.1016/S0040-4039(00)81474-4

Allene-1,3-dicarboxylic esters and acids have been converted into chromenes, chromones, an α-pyrone and a coumarin by reactions with phenols and to quinolones by reaction with aniline derivatives.A novel chromene<*>coumarin rearrangement is also reported.