title: A versatile, flexible synthesis of 1,3-diglycerides and tryglycerides.
abstract: A flexible method for synthesising 1,30diflycerides and triglycerides is described. Glycidol esters, prepared by a known route from epichlorohydrin and the sodium salt of a fatty acid, were heated with another or with the same fatty acid and a quaternary ammonium salt. This resulted in a fast, mild reaction and higher yields and greater purity of the diglycerides than hitherto obtained in this synthesis. The mixture of 1,3- and 1,2-diglycerides obtained was isomerised by heating while still in the solid phase to 1,3-diglycerides. Triglycerides were prepared from the diglycerides by acylation using a fatty acid chloride and pyridine in hexane.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D002845:Chromatography; D002849:Chromatography, Gas; D002855:Chromatography, Thin Layer; D004075:Diglycerides / Q000138:chemical synthesis*; D005989:Glycerides / Q000138:chemical synthesis*; D008722:Methods; D012822:Silicon Dioxide; D014280:Triglycerides / Q000138:chemical synthesis*
chemical_list: D004075:Diglycerides; D005989:Glycerides; D014280:Triglycerides; D012822:Silicon Dioxide