Rapid access to structured triacylglycerols acylated with n-3 polyunsaturated fatty acids for nutritional applications
摘要:
In order to better understand the metabolic fate of n-3 polyunsaturated fatty acids (PUFAs), an efficient access to symmetrical and unsymmetrical triacylglycerols (TGs), esterified with PUFAs, with known high purity, is required. In this context, we optimized the esterification of a mixture of glycerols protected as dioxane and dioxolane with PUFAs. The kinetics of this reaction depends on various factors, such as the fatty acid chain length and the stereochemistry of the dioxane. Then, one-pot acetal hydrolysis and esterification of hydroxyl groups led to the desired structured TGs without either double bond isomerization or acyl migration (except when symmetrical TGs are acylated with long-chain saturated fatty acids in external positions). PUFAs location on the glycerol backbone was assayed by NMR, HPLC and pancreatic lipase hydrolysis. (C) 2010 Elsevier Ltd. All rights reserved.
Regioisomeric Characterization of Triacylglycerols Using Silver-Ion HPLC/MS and Randomization Synthesis of Standards
作者:Miroslav Lísa、Hana Velínská、Michal Holčapek
DOI:10.1021/ac900150j
日期:2009.5.15
Silver-ion normal-phase high-performance liquid chromatography (HPLC) provides a superior separation selectivity for lipids differing in the number and position of double bonds in fatty acid chains including the resolution of triacylglycerol (TG) regioisomers under optimized conditions. Our silver-ion HPLC method is based on the coupling of three columns in the total length of 75 cm and a new mobile phase gradient consisting of hexane−acetonitrile−2-propanol which provides better resolution and also reproducibility in comparison to previously used mobile phases. In our work, the chemical interesterification (randomization) of single-acid TG standards is used for the generation of regioisomeric series of TGs, because it provides a random distribution of fatty acids in TGs at well-defined concentration ratios. The baseline separation of regioisomeric TG pairs containing up to three double bonds and the partial separation of TG regioisomers with four to seven double bonds are reported for the first time. Our silver-ion high-performance liquid chromatography/mass spectrometry (HPLC/MS) method is applied for the regioisomeric characterization of complex samples of plant oils and animal fat, where the results clearly demonstrate different preference of sn-2 occupation in plants (mainly unsaturated fatty acids) versus animal fat (mainly saturated fatty acids).
Certain metathesized natural oil triacylglycerol polyols for use in polyurethane applications and their related properties
申请人:Trent University
公开号:US10000442B2
公开(公告)日:2018-06-19
Metathesized triacylglycerol polyols derived from certain natural oils, including canola oil, and their related physical properties are disclosed. Such metathesized triacylglycerol polyols are also used as a component of polyurethane applications, including polyurethane foams.
CERTAIN METATHESIZED NATURAL OIL TRIACYLGLYCEROL POLYOLS FOR USE IN POLYURETHANE APPLICATIONS AND THEIR RELATED PROPERTIES
申请人:Trent University
公开号:US20150299099A1
公开(公告)日:2015-10-22
Metathesized triacylglycerol polyols derived from certain natural oils, including canola oil, and their related physical properties are disclosed. Such metathesized triacylglycerol polyols are also used as a component of polyurethane applications, including polyurethane foams.
[EN] CERTAIN METATHESIZED NATURAL OIL TRIACYLGLYCEROL POLYOLS FOR USE IN POLYURETHANE APPLICATIONS AND THEIR RELATED PHYSICAL PROPERTIES<br/>[FR] POLYOLS DE TRIACYLGLYCÉROLS À BASE D'HUILE NATURELLE AYANT SUBI UNE MÉTATHÈSE DESTINÉS À ÊTRE UTILISÉS DANS DES APPLICATIONS DE POLYURÉTHANE ET LEURS PROPRIÉTÉS PHYSIQUES ASSOCIÉES
申请人:TRENT UNIVERSITY
公开号:WO2015143563A1
公开(公告)日:2015-10-01
Metathesized triacylglycerol polyols derived from natural oils such as: canola, rapeseed, olive, soy, sunflower, safflower, linseed, tung, mustard, camelina, hemp, algal and castor oil are disclosed. The synthesis of polyols derived from canola oil metathesized triacylglycerols are also disclosed and their uses in polyurethane applications, including polyurethane foams.
Rapid access to structured triacylglycerols acylated with n-3 polyunsaturated fatty acids for nutritional applications
In order to better understand the metabolic fate of n-3 polyunsaturated fatty acids (PUFAs), an efficient access to symmetrical and unsymmetrical triacylglycerols (TGs), esterified with PUFAs, with known high purity, is required. In this context, we optimized the esterification of a mixture of glycerols protected as dioxane and dioxolane with PUFAs. The kinetics of this reaction depends on various factors, such as the fatty acid chain length and the stereochemistry of the dioxane. Then, one-pot acetal hydrolysis and esterification of hydroxyl groups led to the desired structured TGs without either double bond isomerization or acyl migration (except when symmetrical TGs are acylated with long-chain saturated fatty acids in external positions). PUFAs location on the glycerol backbone was assayed by NMR, HPLC and pancreatic lipase hydrolysis. (C) 2010 Elsevier Ltd. All rights reserved.