Structures of kokzeylanol and kokzeylanonol two new natural tri- and tetra- oxygenated D:A-friedo-oleananes

A. A.Leslie Gunatilaka, N. P.Dhammika Nanayakkara, M. Uvais, S. Sultanbawa

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Kokzeylanol and kokzeylanonol obtained from Kokoona zeylanica have been shown to be 6β,27-dihydroxy-D:A-friedo-olean-3-one (1) and 6β,27-dihydroxy-D:A-friedo-oleana-3,21-dione (2), respectively by the deoxygenatlon of their 27-acetoxy derivatives using Lithium-ethylene diamine reduction coupled with spectroscopic and irradiation methods. Kokzeylanonol represents the first tetraoxygenated D:A-friedo-oleanane isolated from a natural source.

Original languageEnglish (US)
Pages (from-to)1425-1428
Number of pages4
JournalTetrahedron Letters
Volume22
Issue number15
DOIs
StatePublished - 1981
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry
  • Drug Discovery
  • Organic Chemistry

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