A 13C n.m.r. analysis of [1-13C]- and [1,2- 13C2]-acetate- and [Me-13C]methionine-derived ascochitine confirms its origin from a single hexaketide chain and three C 1 units. An ortho-quinone-methide structure is assigned on the basis of the 13C-1H n.m.r. coupling patterns.
Biosynthetic origin and revised structure of ascochitine, a phytotoxic fungal metabolite. Incorporation of [1-13C]- and [1,2- 13C2]-acetates and [Me-13C]methionine / L. Colombo, C.M.A. Gennari, G. Severini Ricca, C. Scolastico, F. Aragozzini. - In: JOURNAL OF THE CHEMICAL SOCIETY. PERKIN TRANSACTIONS. I. - ISSN 0300-922X. - (1980), pp. 675-676. [10.1039/P19800000675]
Biosynthetic origin and revised structure of ascochitine, a phytotoxic fungal metabolite. Incorporation of [1-13C]- and [1,2- 13C2]-acetates and [Me-13C]methionine
C.M.A. Gennari;C. Scolastico;
1980
Abstract
A 13C n.m.r. analysis of [1-13C]- and [1,2- 13C2]-acetate- and [Me-13C]methionine-derived ascochitine confirms its origin from a single hexaketide chain and three C 1 units. An ortho-quinone-methide structure is assigned on the basis of the 13C-1H n.m.r. coupling patterns.
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