Literature

Abstract

The constitutions of three new sesquiterpene alkaloids, cathedulin-K19 (1) (C54H58N2O23, M 1 102), cathedulin-K17 (6) (C59H62N2O23, M 1 166), and cathedulin-K20 (8) (C59H62N2O 23, M 1 166), obtained in small quantities from stems and leaves of Catha edulis (khat), have been demonstrated by spectroscopic examination. Alkaloids K17 and K19 contain a novel diester bridge derived from (Z)-4-(3-carboxy-2-pyridyl)-2-methylbut-3-enoic acid.

DOI： 10.1039/p19860000531

New macrolide sesquiterpene alkaloids of Catha edulis: examples containing a novel dilactone bridge

J. Chem. Soc., Perkin Trans. 1 2004.0

New macrolide sesquiterpene alkaloids of Catha edulis: examples containing a novel dilactone bridge

J. Chem. Soc., Perkin Trans. 1 2004.0

Alkaloids of catha edulis(khat). Part 1. Isolation and characterisation of eleven new alkaloids with sesquiterpene cores (cathedulins); identification of the quinone–methide root pigments

J. Chem. Soc., Perkin Trans. 1 2004.0

Alkaloids of catha edulis(khat). Part 1. Isolation and characterisation of eleven new alkaloids with sesquiterpene cores (cathedulins); identification of the quinone–methide root pigments

J. Chem. Soc., Perkin Trans. 1 2004.0

The absolute configuration of edulinic acid, a constituent of the “Khat” alkaloid cathedulin K-19

Tetrahedron Letters 1993.0

Constituents of Catha edulis