Phosphorylated polyenols of biochemical interest: cis=trans stereoisomeric retinylphosphates.
All-trans biscyclohexylammonium retinylphosphate was synthesized using bis (triethylammonium) phosphate as the phosphate donor. It was shown to be pure from physico-chemical evidence including ultraviolet, infrared, 1H- and 13C-nuclear magnetic resonance and mass spectrometry. In contrast to previous reports, the synthesized product is quite stable toward alkaline hydrolysis. Direct or iodine-catalyzed photoisomerization of the all-trans compound can produce the corresponding 13-cis isomer. Simultaneous quantification of cis-trans stereoisomeric retinylphosphates was demonstrated by ion-pairing reversed-phase liquid chromatography with an isocratic mobile phase consisting of aqueous methanol and with ultraviolet detection at 300 nm. The mobile phase also contains tetrabutylammoniumphosphate as the counter-ion. The feasibility and extent of stereoisomerization of all-trans retinylphosphate have been compared with those of carotenoidal and retinoidal polyenes.
D002851:Chromatography, High Pressure Liquid; D002855:Chromatography, Thin Layer; D004224:Diterpenes; D007536:Isomerism; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D014801:Vitamin A / Q000031:analogs & derivatives* / Q000032:analysis
D004224:Diterpenes; D014801:Vitamin A; C012532:retinol phosphate