Biosynthesis of tajixanthone in Aspergillus variecolor; incorporation of [2H3]acetate and [1,2-13C2]acetate
Abstract
The results of 13C and 2H n.m.r. analyses of [2H33]- and [1,2-13C22]-acetate-enriched tajixanthone are reported, which indicate, inter alia, that ring cleavage of an anthraquinone, and not anthrone, precursor must precede C-prenylation, and that dihydropyran ring formation precedes xanthone ring formation during biosynthesis of tajixanthone.