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Biotransformation of Glabratephrin, a Rare Type of Isoprenylated Flavonoids, by Aspergillus niger

Authors
  • Mohamed, Abou-El-Hamd H
  • Khalafallah, Ali K.
  • Yousof, Afifi H.
Type
Published Article
Journal
Zeitschrift für Naturforschung C
Publisher
Walter de Gruyter GmbH
Publication Date
Aug 01, 2008
Volume
63
Issue
7-8
Pages
561–564
Identifiers
DOI: 10.1515/znc-2008-7-816
Source
De Gruyter
Keywords
License
Green

Abstract

Microbial transformation of glabratephrin, the major isolated compound from Tephrosia purpurea, afforded pseudosemiglabrin. The formation of the transformed compound seems to be performed via ring opening-closure of a five-membered ring causing transformation from a spiro into a fused system. The structure of the transformed compound was determined by comprehensive NMR studies, including DEPT, COSY, HMQC, NOE and MS.

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