4,6-Dimethoxy-3,7-dimethylcoumarin from Colchicum decaisnei. Total synthesis by carbamoyl Baker-Venkataraman rearrangement and structural revision to isoeugenetin methyl ether

Article abstract of DOI:10.1016/S0040-4039(98)00978-2

Coumarin (1), the putative natural product isolated from Colchicum decaisnei, has been shown, by spectroscopic analysis and total synthesis, to be isoeugenetin methyl ether (2a), a synthetic derivative of the isoeugenetin (2b), isolated from Eugenia caryo