Helvetica Chimica Acta p. 237 - 248 (1984)
Update date:2022-08-11
Topics:
Homberger, Katharina
Hesse, Manfred
From the leaves of Kopsia dasyrachis Ridl, a new typ of alkaloid, kopsirachine (1) built up from catechin (2) and skytanthine (3) has been isoled.The structure elucidation is based on spectral and chemical evidence.Oxidative cleavage of its derivative 4 with KMnO4 afforded veratric acid which was identified as its methylester by comparison with an authentic sample.Pyrolysis of 1 yielded δ-skythanthine (3).The stereochemistry of the skythanthine substrituents in 1 could not yet be estabilished.
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