Article

Isolation, X-ray crystallography, and computational studies of calydaphninone, a new alkaloid from Daphniphyllum calycillum.

State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, Yunnan, PR China.
Organic Letters (impact factor: 5.86). 04/2007; 9(7):1355-8. DOI:10.1021/ol070218r pp.1355-8
Source: PubMed

ABSTRACT [structure: see text]. A new hexacyclic alkaloid, calydaphninone (1), containing a 4-azatricyclo[5.2.2.0(1,4)]undecan ring system, has been isolated from the leaves and twigs of Daphniphyllum calycillum (Daphniphyllaceae). Its structure was elucidated by spectral and crystallographic means. Furthermore, conformations of calydaphninone (1) in solution are discussed on the basis of NMR spectral analysis and computational (B3LYP/6-31G*) results.

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Keywords

calydaphninone
 
Daphniphyllum calycillum
 
new hexacyclic alkaloid
 
NMR spectral analysis
 
text]
 
twigs