Studies on terpenoids and steroids, 25. Complete 1H-and 13C-NMR spectral assignments of salaciquinone, a new 7-oxo-quinonemethide dinortriterpenoid

Yasuhiro Tezuka, Tohru Kikuchi, Bhavani Dhanabalasingham, Veranja Karunaratne, Leslie Gunatilaka

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

A new 7-oxo-quinonemethide dinortriterpenoid, salaciquinone [1], and a known quinonemethide dinortriterpenoid, isoiguesterin [3], were isolated from the root bark of Salacia reticulata var. β-diandra (Celastraceae). The structure elucidation of salaciquinone was based on detailed 2D and nOe-difference nmr spectroscopy, leading to the complete assignment of the 1H-and 13C-nmr spectra and revision of some 1H-nmr spectral assignments made previously for the related 7-oxo-quinonemethide nortriterpenoid, dispermoquinone [2]. Complete 1H- and 13C-nmr spectral assignments of isoiguesterin were also made, also leading to revision of some 13C-nmr assignments previously made for this compound.

Original languageEnglish (US)
Pages (from-to)270-276
Number of pages7
JournalJournal of Natural Products
Volume57
Issue number2
StatePublished - 1994
Externally publishedYes

Fingerprint

Celastraceae
Terpenes
terpenoids
steroids
Salacia
spectroscopy
bark
Steroids
Nuclear magnetic resonance
Spectrum Analysis
Spectroscopy
Salacia reticulata
iguesterin
Proton Magnetic Resonance Spectroscopy
Carbon-13 Magnetic Resonance Spectroscopy

ASJC Scopus subject areas

  • Plant Science
  • Chemistry (miscellaneous)
  • Drug Discovery
  • Organic Chemistry
  • Pharmacology

Cite this

Studies on terpenoids and steroids, 25. Complete 1H-and 13C-NMR spectral assignments of salaciquinone, a new 7-oxo-quinonemethide dinortriterpenoid. / Tezuka, Yasuhiro; Kikuchi, Tohru; Dhanabalasingham, Bhavani; Karunaratne, Veranja; Gunatilaka, Leslie.

In: Journal of Natural Products, Vol. 57, No. 2, 1994, p. 270-276.

Research output: Contribution to journalArticle

Tezuka, Yasuhiro ; Kikuchi, Tohru ; Dhanabalasingham, Bhavani ; Karunaratne, Veranja ; Gunatilaka, Leslie. / Studies on terpenoids and steroids, 25. Complete 1H-and 13C-NMR spectral assignments of salaciquinone, a new 7-oxo-quinonemethide dinortriterpenoid. In: Journal of Natural Products. 1994 ; Vol. 57, No. 2. pp. 270-276.
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