A NEW CLASS OF NATURAL PRODUCT: HOMOLOGUES OF JUGLONE BEARING 4-HYDROXY-5-METHYL-COUMARIN-3-YL UNITS FROM DIOSPYROS SPECIES

Article abstract of DOI:10.1016/S0040-4039(00)81611-1

7-Methyljuglone bearing 4-hydroxy-5-methylcoumarin-3-yl units at C(2) and C(3) has been isolated from the bark of Diospyros ismailii Ng (Ebenaceae), and 2-methyljuglone (plumbagin) carrying the same coumarin-3-yl unit at C(3) has been isolated from Diospyros canaliculata De Wild; and the structures of both members of this new class of natural product confirmed by synthesis.