Biosynthetic studies with carbon-13. Carbon-13 nuclear magnetic resonance spectra of radicinin

1970 ◽  
Vol 92 (7) ◽  
pp. 2157-2158 ◽  
Author(s):  
Masato. Tanabe ◽  
Haruo. Seto ◽  
LeRoy. Johnson
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Nuclear Magnetic Resonance Spectra ◽  
Biosynthetic Studies ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

Metabolites produced by the Scleroderris canker fungus, Gremmeniellaabietina. Part 4. Biosynthetic studies

1987 ◽  
Vol 65 (4) ◽  
pp. 760-764 ◽  
Author(s):  
William A. Ayer ◽  
M. Soledade Pedras ◽  
Dale E. Ward
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Methyl Carbon ◽  
Nuclear Magnetic Resonance Spectra ◽  
Biosynthetic Studies ◽  
Carboxyl Carbon ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

The biosynthetic origin of the carbon atoms of the most highly oxidized, polyketide derived, ring (carbons 1–3) of the Gremmeniellaabietina metabolites sclerodione (3), scleroderolide (4), sclerodin (5), and Scleroderris green (6) has been studied. It is shown that both C-1 and C-3 of 3 and 4 are derived from C-1 of acetate, and that C-2 of scleroderolide (4) is derived from C-2 of acetate while C-3 is derived from C-1 of acetate. As expected, C-1 and C-3 of Scleroderris green (6) originate from the carboxyl carbon of acetate, while C-2 originates from the methyl carbon of acetate. Complete 13C and 1H nuclear magnetic resonance spectra of these metabolites are reported. It has also been shown that ent-atrovenetin (ent-7a) is a metabolite of G. abietina.

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