title: The chemical synthesis of ecdysone 22-long-chain fatty acyl esters in high yield.
abstract: Eight ecdysone 22-long-chain fatty-acyl esters (laurate, myristate, palmitate, stearate, oleate, linoleate, linolenate and arachidate) have been chemically synthesised in high yield. Ecdysone was first converted to the 2,3-acetonide derivative and then acylated selectively at C-22 with the appropriate acyl anhydride. The protecting acetonide group is then removed by mild acid treatment to yield the ecdysone 22-acyl ester. Reaction conditions have been optimised to maximise the overall yield (ca. 70%). The ecdysone acyl esters and their 2,3-acetonide derivatives have been characterised by 1H- and 13C-NMR and high-resolution FAB-mass-spectrometry.
authors.affiliation: Department of Biological Sciences, University of Exeter, Devon, England.
authors.forename: L
authors.initials: L
authors.lastname: Dinan
mesh_terms: D000215:Acylation; D055598:Chemical Phenomena; D002621:Chemistry; D002851:Chromatography, High Pressure Liquid; D004440:Ecdysone / Q000031:analogs & derivatives* / Q000138:chemical synthesis; D004952:Esters / Q000138:chemical synthesis; D005227:Fatty Acids / Q000138:chemical synthesis*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry
chemical_list: D004952:Esters; D005227:Fatty Acids; C056747:ecdysone 2,3-acetonide; D004440:Ecdysone