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Structure and absolute configuration of acetosellin, a new polyketide from a phytotoxic strain of Cercosporella acetosella

✍ Scribed by Gianluca Nasini; Alberto Arnone; Gemma Assante; Gabriele Candiani; Orso Vajna de Pava

Publisher
Elsevier Science
Year
2002
Tongue
French
Weight
127 KB
Volume
43
Category
Article
ISSN
0040-4039

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✦ Synopsis

A new yellow pigment, designated acetosellin 1, was isolated from the mycelium of Cercosporella acetosella as a reduced azaphilone metabolite. The structure of 1 was determined by spectroscopic investigations and chemical evidence. Compound 1 possesses a novel carbon skeleton that of a naphtopyrane derivative, linked to an extensively conjugated chain. The absolute configuration was determined by NOE experiments and CD correlations.

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Structure and absolute configuration of
Structure and absolute configuration of myrtine, a new quinolizidine alkaloid from vacciniun myrtillus.
✍ P. Slosse; C. HootelΓ© πŸ“‚ Article πŸ“… 1978 πŸ› Elsevier Science 🌐 French βš– 115 KB

Examination of Vaccinium myrtillus (Ericaceae) has revealed the presence of alkaloids (1) ; the structure of a new base, myrtine (10 mg/kg), has been determined by spectral analysis and confirmed by synthesis. Myrtine (I; an oil; picrate: m.p. 175-177O (dec.); C10H17N0 by ms, M+ at 167 m.u., base pe