Pulvinones biosynthesis

Alternatively, the pulvinone nucleus of pigment (115) could derive via oxidative decarboxylation of the hypothetical intermediate (9) already implicated in the biosynthesis of grevillins, terphenylquinones (and hence pulvinic acids), and the pigment (10). 

In studies of later stages in the biosynthesis of the chromanated pulvinone (69) from the 4,4 -dihydroxy pulvinone (64) in A, terreus, Seto and co-workers (78, 79) have been able to separate a cell-free enzyme system from the fungus which catalyses the transfer of the prenyl-moiety from 3,3-dimethylallyl pyrophosphate to the aryl rings of... 

Ojima, N., K. Ogura, and S. Seto Biosynthesis of Pulvinone Derivatives in Aspergillus terreus. Enzymatic Prenylation of Dihydroxy pulvinone. Chem. Commun. 717 (1975). 

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