Two novel tetracycles, cassibiphenols A and B from the flowers of Cassia siamea

Jun Deguchi, Tadahiro Sasaki, Yusuke Hirasawa, Toshio Kaneda, Idha Kusumawati, Osamu Shirota, Hiroshi Morita

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Chemical investigation of the flowers of Cassia siamea (Leguminosae), resulted in the isolation of two novel tetracycles connecting 5-(2-hydroxypropyl)benzene-1,3-diol, cassibiphenols A (1) and B (2). The structures were elucidated by analysis of the 1D, 2D NMR, and HRMS spectra. Synthesis of a tetracyclic core of 1 and 2 led to determine the absolute configuration of 1 and C-12 of 2.

Original languageEnglish
Pages (from-to)1362-1365
Number of pages4
JournalTetrahedron Letters
Volume55
Issue number7
DOIs
Publication statusPublished - 12 Feb 2014

Keywords

  • Biphenyl
  • Cassia siamea
  • Cassibiphenols A and B
  • Partial synthesis
  • Structure elucidation

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