Synthesis and Analysis of Symmetrical and Nonsymmetrical Disaturated/Monounsaturated Triacylglycerols
作者:Richard O. Adlof、Gary R. List
DOI:10.1021/jf021085l
日期:2003.3.1
the symmetrical triacylglycerols with >99% SUS structure. The more difficult to obtain 1,2-diacylglycerols were prepared by esterification of the enriched 1,2-diacylglycerol fraction (80-86% 1,2-diacylglycerols) remaining after removal of much of the 1,3-isomer by crystallization, but silver resin or silver nitrate impregnated silica gel chromatography was required to isolate the nonsymmetrical triacylglycerols
SUS结构的对称不饱和三酰基甘油,其中S为硬脂酸(18:0),U为不饱和脂肪酸,既可以是油酸(O; 9cis-18:1),也可以是亚油酸(L; 9cis,12cis-18:2)或亚麻酸(Ln; 9cis,12cis,15cis-18:3)是重要的组分,可为酯交换的脂肪混合物和结构改性的油提供功能。SSU结构的不对称三酰基甘油可以显着改变熔点和固体脂肪含量曲线。为了表征纯的和对称的和非对称的三酰基甘油混合物的物理性质,已使用相同的反应顺序来制备多克量的三酰基甘油SUS和SSU。将ristearearin转化为单,二和三酰基甘油的混合物,并通过硅胶柱色谱分离出1,3-和1,2-二酰基甘油馏分。1 通过从丙酮中结晶除去3-二酰基甘油,并用适当的脂肪酸酯化以形成具有> 99%SUS结构的对称的三酰基甘油。通过结晶除去许多1,3-异构体后剩余的富集的1,2-二酰甘油部分(80-86%1,2-二酰甘油)进行酯化,制得更难获得的1