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Synthesis and nuclear magnetic resonance study of 3‐dehydroecdysteroids
Author(s) -
Girault JeanPierre,
Blais Catherine,
Beydon Philippe,
Rolando Christian,
Lafont René
Publication year - 1989
Publication title -
archives of insect biochemistry and physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.576
H-Index - 66
eISSN - 1520-6327
pISSN - 0739-4462
DOI - 10.1002/arch.940100304
Subject(s) - chloroform , methanol , nuclear magnetic resonance , nuclear magnetic resonance spectroscopy , proton magnetic resonance , proton nmr , proton , chromatography , chemistry , organic chemistry , physics , nuclear physics
Several 3‐dehydro‐ (or 3‐oxo‐) ecdysteroids have been prepared by enzymatic and/or chemical means. Methods for their purification using various high‐performance liquid chromatography systems are described. Proton and carbon nuclear magnetic resonance analyses show that 3‐dehydroecdysteroids when dissolved in water or methanol (but not in chloroform) present a temperature‐dependent equilibrium between two forms. The possible structure of these two forms is discussed.