Kopsirachin, ein ungewöhnliches Alkaloid aus der Apocynaceae  Kopsia dasyrachis  Ridl. 189. Mitteilung über organische Naturstoffe | Zendy

Homberger Katharina | Zendy; Hesse Manfred | Zendy

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Kopsirachin, ein ungewöhnliches Alkaloid aus der Apocynaceae Kopsia dasyrachis Ridl. 189. Mitteilung über organische Naturstoffe

Author(s) -

Homberger Katharina,

Hesse Manfred

Publication year - 1984

Publication title -

helvetica chimica acta

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.74

H-Index - 82

eISSN - 1522-2675

pISSN - 0018-019X

DOI - 10.1002/hlca.19840670130

Subject(s) - apocynaceae , chemistry , alkaloid , stereochemistry , oxidative cleavage , organic chemistry , traditional medicine , medicine , catalysis

Kopsirachine, an Unusual Alkaloid from the Apocynaceae Kopsia dasyrachis Ridl. From the leaves of Kopsia dasyrachis Ridl. a new type of alkaloid, kopsirachine ( 1 ), built up from catechin ( 2 ) and skytanthine ( 3 ) has been isolated. The structure elucidationis based on spectral and chemical evidence. Oxidative cleavage of its derivative 4 with KMnO 4 afforded veratric acid wich was identified as its methylester by comparison with an authentic sample. Pyrolysis of 1 yielded δ‐skytanthine ( 3 ). The stereochemistry of the skytanthine substituents in 1 could not yet be established.

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