6-PRENYLOXY-7-METHOXYCOUMARIN, A COUMARIN-HEMITERPENE ETHER FROM CARDUUS TENUIFLORUS

Article abstract of DOI:10.1016/S0031-9422(00)97569-1

From the acetone extract of Carduus tenuiflorus, a new coumarin-hemiterpene ether was isolated, which was identified as 6-(3,3-dimethylallyloxy)-7-methoxycoumarin.The synthesis of this coumarin and that of its positional isomer 7-(3,3-dimethylallyloxy)-6-methoxycoumarin were carried out from esculetin.Two other coumarins, three lignans and three flavonoids were also isolated. Key Word Index: Carduus tenuiflorus; Compositae; prenyloxycoumarins; isolation; synthesis; lignans; flavonoids.