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Kopsine and Danuphylline Alkaloids from Kopsia. Biomimetic Partial Synthesis of Danuphylline B

✍ Scribed by Kuan-Hon Lim; Yun-Yee Low; Guan-Huat Tan; Toh-Seok Kam; Tuck-Meng Lim

Publisher: John Wiley and Sons
Year: 2008
Tongue: German
Weight: 198 KB
Volume: 91
Category: Article
ISSN: 0018-019X
DOI: 10.1002/hlca.200890169

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✦ Synopsis

Abstract

Two new indole alkaloids, 12‐methoxykopsine (6) and danuphylline B (7), were obtained from the leaf extract of the Malayan Kopsia species, K. arborea, and their structures established by spectroscopic analysis. An electrochemically‐mediated partial synthesis of the ring‐opened alkaloid, danuphylline B from the hexacyclic alkaloid, methyl N(1)‐de(methoxycarbonyl)chanofruticosinate was carried out.

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