Cassane diterpenoids from the roots of Caesalpinia decapetala var. japonica and structure revision of caesaljapin

  • Phytochemistry. 2016 Jan:121:50-7. doi: 10.1016/j.phytochem.2015.10.001.
Sayuri Kamikawa  1 ,  Shiori Oshimo  1 ,  Emi Ohta  1 ,  Tatsuo Nehira  2 ,  Hisashi Ômura  1 ,  Shinji Ohta  3
Affiliations
  • 1. Graduate School of Biosphere Science, Hiroshima University, 1-7-1 Kagamiyama, Higashi-Hiroshima 739-8521, Japan.
  • 2. Graduate School of Integrated Arts and Sciences, Hiroshima University, 1-7-1 Kagamiyama, Higashi-Hiroshima 739-8521, Japan.
  • 3. Graduate School of Biosphere Science, Hiroshima University, 1-7-1 Kagamiyama, Higashi-Hiroshima 739-8521, Japan. Electronic address: [email protected].
PMID: 26481825 DOI: 10.1016/j.phytochem.2015.10.001
Abstract

Two cassane-type furanoditerpenoids, designated caesalacetal and caesalpinetate, and a norditerpenoid designated caesalpinone were isolated from the roots of Caesalpinia decapetala var. japonica along with seven known Diterpenoids. Structures were elucidated by interpretation of their spectroscopic data, and the absolute structure of caesalacetal was confirmed by X-ray crystallographic analysis. Furthermore, the structure of a previously reported furanoditerpenoid, caesaljapin, was revised as its C-4 epimer on the basis of detailed NMR spectroscopic data as well as X-ray crystallographic analysis.

Keywords
Caesalacetal; Caesaljapin; Caesalpinetate; Caesalpinia decapetala var. japonica; Caesalpinone; Cassane diterpenoid; Leguminosae.
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