AU735493B2 - Conjugated linolenic acid-based synthetic triglycerides - Google Patents
Conjugated linolenic acid-based synthetic triglycerides Download PDFInfo
- Publication number
- AU735493B2 AU735493B2 AU74313/98A AU7431398A AU735493B2 AU 735493 B2 AU735493 B2 AU 735493B2 AU 74313/98 A AU74313/98 A AU 74313/98A AU 7431398 A AU7431398 A AU 7431398A AU 735493 B2 AU735493 B2 AU 735493B2
- Authority
- AU
- Australia
- Prior art keywords
- triglycerides
- conjugated linoleic
- linoleic acid
- acid
- synthetic triglycerides
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 150000003626 triacylglycerols Chemical class 0.000 title claims abstract description 36
- DTOSIQBPPRVQHS-PDBXOOCHSA-N alpha-linolenic acid Chemical compound CC\C=C/C\C=C/C\C=C/CCCCCCCC(O)=O DTOSIQBPPRVQHS-PDBXOOCHSA-N 0.000 title description 2
- 235000020661 alpha-linolenic acid Nutrition 0.000 title description 2
- 229960004488 linolenic acid Drugs 0.000 title description 2
- KQQKGWQCNNTQJW-UHFFFAOYSA-N linolenic acid Natural products CC=CCCC=CCC=CCCCCCCCC(O)=O KQQKGWQCNNTQJW-UHFFFAOYSA-N 0.000 title description 2
- 229940108924 conjugated linoleic acid Drugs 0.000 claims abstract description 39
- OYHQOLUKZRVURQ-IXWMQOLASA-N linoleic acid Natural products CCCCC\C=C/C\C=C\CCCCCCCC(O)=O OYHQOLUKZRVURQ-IXWMQOLASA-N 0.000 claims abstract description 37
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 18
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- 229930195729 fatty acid Natural products 0.000 claims abstract description 18
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- 238000000034 method Methods 0.000 claims description 15
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- JBYXPOFIGCOSSB-GOJKSUSPSA-N 9-cis,11-trans-octadecadienoic acid Chemical group CCCCCC\C=C\C=C/CCCCCCCC(O)=O JBYXPOFIGCOSSB-GOJKSUSPSA-N 0.000 claims 4
- -1 fatty acid esters Chemical class 0.000 abstract description 8
- JBYXPOFIGCOSSB-XBLVEGMJSA-N 9E,11E-octadecadienoic acid Chemical group CCCCCC\C=C\C=C\CCCCCCCC(O)=O JBYXPOFIGCOSSB-XBLVEGMJSA-N 0.000 description 41
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- OYHQOLUKZRVURQ-NTGFUMLPSA-N (9Z,12Z)-9,10,12,13-tetratritiooctadeca-9,12-dienoic acid Chemical compound C(CCCCCCC\C(=C(/C\C(=C(/CCCCC)\[3H])\[3H])\[3H])\[3H])(=O)O OYHQOLUKZRVURQ-NTGFUMLPSA-N 0.000 description 3
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- BGNXCDMCOKJUMV-UHFFFAOYSA-N Tert-Butylhydroquinone Chemical compound CC(C)(C)C1=CC(O)=CC=C1O BGNXCDMCOKJUMV-UHFFFAOYSA-N 0.000 description 2
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- 125000004432 carbon atom Chemical group C* 0.000 description 2
- GHVNFZFCNZKVNT-UHFFFAOYSA-N decanoic acid Chemical compound CCCCCCCCCC(O)=O GHVNFZFCNZKVNT-UHFFFAOYSA-N 0.000 description 2
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- GKJZMAHZJGSBKD-BLHCBFLLSA-N (10e,12e)-octadeca-10,12-dienoic acid Chemical compound CCCCC\C=C\C=C\CCCCCCCCC(O)=O GKJZMAHZJGSBKD-BLHCBFLLSA-N 0.000 description 1
- OBETXYAYXDNJHR-SSDOTTSWSA-M (2r)-2-ethylhexanoate Chemical compound CCCC[C@@H](CC)C([O-])=O OBETXYAYXDNJHR-SSDOTTSWSA-M 0.000 description 1
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- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11C—FATTY ACIDS FROM FATS, OILS OR WAXES; CANDLES; FATS, OILS OR FATTY ACIDS BY CHEMICAL MODIFICATION OF FATS, OILS, OR FATTY ACIDS OBTAINED THEREFROM
- C11C3/00—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom
- C11C3/04—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom by esterification of fats or fatty oils
- C11C3/08—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom by esterification of fats or fatty oils with fatty acids
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23D—EDIBLE OILS OR FATS, e.g. MARGARINES, SHORTENINGS, COOKING OILS
- A23D9/00—Other edible oils or fats, e.g. shortenings, cooking oils
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23D—EDIBLE OILS OR FATS, e.g. MARGARINES, SHORTENINGS, COOKING OILS
- A23D9/00—Other edible oils or fats, e.g. shortenings, cooking oils
- A23D9/02—Other edible oils or fats, e.g. shortenings, cooking oils characterised by the production or working-up
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
- A23L3/34—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals
- A23L3/3454—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals in the form of liquids or solids
- A23L3/3463—Organic compounds; Microorganisms; Enzymes
- A23L3/3481—Organic compounds containing oxygen
- A23L3/3508—Organic compounds containing oxygen containing carboxyl groups
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
- A23L3/34—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals
- A23L3/3454—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals in the form of liquids or solids
- A23L3/3463—Organic compounds; Microorganisms; Enzymes
- A23L3/3481—Organic compounds containing oxygen
- A23L3/3508—Organic compounds containing oxygen containing carboxyl groups
- A23L3/3517—Carboxylic acid esters
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
- A23L33/10—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
- A23L33/115—Fatty acids or derivatives thereof; Fats or oils
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
- A23L33/10—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
- A23L33/115—Fatty acids or derivatives thereof; Fats or oils
- A23L33/12—Fatty acids or derivatives thereof
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L5/00—Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
- A23L5/40—Colouring or decolouring of foods
- A23L5/41—Retaining or modifying natural colour by use of additives, e.g. optical brighteners
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P3/00—Drugs for disorders of the metabolism
- A61P3/02—Nutrients, e.g. vitamins, minerals
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- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P39/00—General protective or antinoxious agents
- A61P39/06—Free radical scavengers or antioxidants
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/52—Esters of acyclic unsaturated carboxylic acids having the esterified carboxyl group bound to an acyclic carbon atom
- C07C69/587—Monocarboxylic acid esters having at least two carbon-to-carbon double bonds
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B3/00—Refining fats or fatty oils
- C11B3/008—Refining fats or fatty oils by filtration, e.g. including ultra filtration, dialysis
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B3/00—Refining fats or fatty oils
- C11B3/10—Refining fats or fatty oils by adsorption
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11C—FATTY ACIDS FROM FATS, OILS OR WAXES; CANDLES; FATS, OILS OR FATTY ACIDS BY CHEMICAL MODIFICATION OF FATS, OILS, OR FATTY ACIDS OBTAINED THEREFROM
- C11C3/00—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom
- C11C3/02—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom by esterification of fatty acids with glycerol
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11C—FATTY ACIDS FROM FATS, OILS OR WAXES; CANDLES; FATS, OILS OR FATTY ACIDS BY CHEMICAL MODIFICATION OF FATS, OILS, OR FATTY ACIDS OBTAINED THEREFROM
- C11C3/00—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom
- C11C3/04—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom by esterification of fats or fatty oils
- C11C3/06—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom by esterification of fats or fatty oils with glycerol
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
- A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs
Abstract
Synthetic triglycerides of formula (I) are new. R1-R3 = 6-24C fatty acid esters with ≥ 1 of R1-R3 = conjugated linoleic acid ester.
Description
Conjugated Linolenic Acid-Based Synthetic Triglycerides Field of the Invention This invention relates to synthetic triglycerides containing C6- 24 fatty acid residues, with the proviso that at least one residue is a conjugated linoleic acid residue, and to a process for the production of the triglycerides. The invention also relates to the use of the triglycerides in foods and pharmaceutical products.
Prior Art Polyunsaturated o-3 and o-6 fatty acids, such as a-linolenic acid and linoleic acid, are among the fatty acids essential to mammals and human beings. Besides linoleic acid, other isomeric octadecadienoic acids occur in nature. They are distinguished by conjugated double bonds at carbon atoms 9 and 11, 10 and 12 and 11 and 13. These isomeric octadecadienoic acids are collectively referred to in the scientific literature as conjugated linoleic acids (abbreviation: CLAs) and have recently attracted increasing attention (NUTRITION, Vol. 19, No. 6, 1995).
Conjugated linoleic acids are present as constituents in various foods. Their main source are animal foods although significant quantities of CLA are also present in milk and milk products. In addition, CLAs have been found in various oils and fats, the concentration in vegetable oils being significantly lower than the concentration in animal fats Food Compos. Anal. 5, 185-197 (1992)).
Various working groups have reported on the significance of CLAs to the organism. Recently, Shultz et al. reported on the inhibiting effect on the in-vitro growth of human cancer cells (Carcinogenesis 8,1881-1887 (1987) and Cancer Lett. 63,125-133 (1992)).
In in vitro tests, CLAs were tested for their effectiveness against the growth of malignant human melanomas, colon and breast cancer cells. In the culture media, there was a significant reduction in the growth of the cancer cells treated with CLAs by comparison with control cultures. The mechanism by which CLAs exert anticarcinogenic activity is unknown. In addition, CLAs have a strong antioxidative effect so that, for example, the peroxidation of lipids can be inhibited (Atherosclerosis 108, 19-25 (1994)).
Investigations have also been conducted, for example, into the addition of conjugated linoleic acid to foods for the purpose of colour stabilisation (JP 061276939 A2).
The use of conjugated linoleic acid in animal feeds and, in this connection, also in human nutrition is known, for example, from WO 96/06605. This application is concerned with reducing body fat content in animal nutrition. In the statement of problem, the specification also mentions the possibility of application to human beings. In particular, it mentions the use of a fatty emulsion containing 0.5 to 2wt% of conjugated linoleic acid for oral or intravenous administration to human beings.
EP 0 579 901 B relates to the use of conjugated linoleic acid for avoiding loss of weight or for reducing increases in weight or anorexia caused by immunostimulation in human beings or animals.
WO 94/16690 is concerned with improving the efficiency of food utilisation in animals by iadministering an effective quantity of conjugated linoleic acid.
C07907 In connection with the many positive effects of conjugated linoleic acid, as demonstrated in intensive studies, particularly on animals and tissue cultures, the use of conjugated linoleic acid in foods for human consumption has also been discussed. However, the use of free conjugated linoleic acid in foods and pharmaceutical products is limited by the fact that, on the one hand, unwanted reactions with other food constituents can occur where free conjugated linoleic acid is incorporated in complex foods and, on the other hand, by the unpleasant taste and odour of conjugated linoleic acid which can lead to non-acceptance by the consumer. Another disadvantage is that free fatty acids are covered by food additive legislation so that their use in foods is restricted.
Accordingly, the complex problem addressed by the present invention was to find a substitute for conjugated linoleic acid, above all in human nutrition and also for pharmacological use. On the one hand, this substitute would have better organoleptic properties than conjugated linoleic acid and, on the other hand, would lend itself to incorporation in foods without initiating secondary reactions.
Description of the Invention Accordingly, the present invention relates to synthetic triglycerides corresponding to formula O R2 R 1" O0O "R3(I) in which R 1
R
2 and R 3 independently of one another represent C6- 2 4 fatty acid residues, with the proviso that at least one substituent R 1
R
2 or R 3 is a conjugated linoleic acid residue.
The present invention also relates to a process for the production of synthetic triglycerides by esterification of glycerol or transesterification of triglycerides with fatty acid mixtures by methods known from the prior art, with the proviso that at least 50wt% of conjugated linoleic acid is used in the fatty acid mixture, the reaction is carried out in an inert gas atmosphere and heating to the reaction temperature is preferably carried out at a heating rate of 0.2 to 10K per minute.
The present invention also relates to the use of the triglycerides according to the invention in foods and/or as active substances for the production of pharmaceutical products.
It has surprisingly been found that the triglycerides according to the invention are comparable with pure conjugated linoleic acid in their antioxidative and colour-stabilising effect in foods. In addition, they may readily be incorporated in foods and pharmaceutical products without initiating any secondary reactions. In particular, their lipophilic character enables then to be readily incorporated in fat-containing products. The triglycerides according to the invention are also readily absorbed by the animal or human organism. At the same time, they have an almost neutral taste and odour They are therefore far superior in their organoleptic properties to free conjugated linoleic acid. This means, for example, that the triglycerides can be used in larger quantities in foods. Even food supplements consisting of pure triglyceride of conjugated linoleic acid can be taken by mouth by virtue of their outstanding organoleptic properties. Another advantage is that they do not come under food additive legislation, in other words there are no restrictions on their incorporation in foods.
It has also been found that, surprisingly, the triglycerides according to the invention can also Sly be obtained in high yields, more particularly by the direction esterification of glycerol with C07907 conjugated linoleic acid, providing the reaction is carried out in an inert gas and providing a low heating rate is maintained.
Triglycerides In the triglycerides of formula according to the invention, at least one of the substituents R 1
R
2 or R 3 is a conjugated linoleic acid residue while the other constituents represent C6- 24 fatty acid residues. However, triglycerides which, on a statistical average, contain more than 2 conjugated linoleic acid residues per triglyceride are particularly preferred, triglycerides in which the substituents
R
1
R
2 and R 3 represent a conjugated linoleic acid residue being most particularly preferred. In the context of the present invention, triglycerides are also understood to be the technical mixtures of mono-, di- and triglycerides which are obtained in particular in the direct esterification of glycerol with conjugated linoleic acid. A typical composition which is particularly preferred and which is obtained in the process according to the invention, more particularly in the esterification of glycerol with conjugated linoleic acid, contains 60 to 98wt% and preferably 80 to 98wt% of a triglyceride of conjugated linoleic acid, 1 to 40 and preferably 1 to 20wt% of a diglyceride of conjugated linoleic acid and at most 2wt% and preferably at most lwt% of a monoglyceride of conjugated linoleic acid. At the same time, the glyceride to be used in accordance with the invention has an acid value of at most and preferably of at most 3, a hydroxyl value below 40 and preferably below 30 and a peroxide number below 4 and preferably below 2.
Fatty acids Fatty acids in the context of the present invention are aliphatic carboxylic acids corresponding to formula (II):
R
4 CO-OH (II) in which R 4 CO is an aliphatic, linear or branched acyl group containing 6 to 24 carbon atoms and 0 and/or 1, 2 or 3 double bonds.
Typical examples are caproic acid, caprylic acid, 2-ethylhexanoic acid, capric acid, lauric acid, isotridecanoic acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, isostearic acid, oleic acid, elaidic acid, petroselic acid, linoleic acid, linolenic acid, elaeostearic acid, arachic acid, gadoleic acid, behenic acid and erucic acid and the technical mixtures thereof obtained, for example, in the pressure hydrolysis of natural fats and oils, in the reduction of aldehydes from Roelen's oxosynthesis or in the dimerisation of unsaturated fatty acids.
Technical C 1 2- 1 8 fatty acids such as, for example, cocofatty acid, palm oil fatty acid, palm kernel oil fatty acid or tallow fatty acid, are preferred.
According to the invention, conjugated linoleic acid is preferably understood to be the main isomers 9,11-octadecadienoic acid and 10,12-octadecadienoic acid, but also includes the isomer mixtures normally obtained in the production of conjugated linoleic acid.
Transesterification The fatty acid glycerides to be used as starting materials in accordance with the invention may be the usual natural vegetable or animal fats and oils. These include, for example, palm oil, palm nel oil, cottonseed oil, rapeseed oil, coconut oil, peanut oil, olive oil, linseed oil, babassu oil, tea oil, i e kernel oil, meadow foam oil, chaulmoogra oil, coriander oil, soybean oil, castor oil, lard oil, beef C07907 tallow, lard, fish oil and also sunflower oil and rapeseed oil from old and new plants. The main constituents of these fats and oils are glycerides of various types of fatty acids which contain considerable quantities of impurities such as, for example, aldehyde compounds, phospholipid compounds and free fatty acids. These materials may be used either directly or after purification. In some cases, it is particularly advisable to esterify the free fatty acids with lower alcohols in a preliminary reaction. These triglycerides are transesterified with fatty acid mixtures containing at least more especially 70 to 100wt% of conjugated linoleic acid in an inert gas atmosphere by methods known from the prior art, ie. by acidic and/or basic transesterification. Nitrogen is preferably used as the inert gas. The reaction is preferably carried out at a temperature of 180 to 240*C. In one particularly preferred embodiment, heating to that temperature is carried out at a low rate of 0.2 to and preferably 0.5 to 3K per minute. Suitable catalysts are any of the usual catalysts known from the prior art for esterification or transesterification reactions. Such catalysts are, for example, alkali metal and/or alkaline earth metal alcoholates or hydroxides, more especially sodium methanolate and sodium glycerate. It is also preferred to use acetates, such as zinc and/or magnesium acetate, or even titanates and, in particular, tin compounds, organotin compounds, such as dibutyl tin diacetate for example, or tin salts.
Esterification In one particularly preferred embodiment, the triglycerides according to the invention are not produced by transesterification, but rather by the direct esterification of glycerol with a fatty acid mixture containing at least 50 and preferably 70 to 100wt% of conjugated linoleic acid in an inert gas atmosphere, again preferably nitrogen, by methods known from the prior art. The esterification of glycerol with 100wt% of conjugated linoleic acid is particularly preferred. Technical mixtures of mono-, di- and triglycerides of conjugated linoleic acid are normally obtained. According to the invention, these mixtures may be used both directly and after further purification. The foregoing observations on the temperature, heating rate and catalyst used for the transesterification apply similarly to esterification.
After esterification or transesterification, 0.01 to 1wt% of an antioxidant is preferably added. In another preferred embodiment, the triglyceride obtained is purified using a thin-layer evaporator, after which another 0.01 to 1wt% of an antioxidant is added.
Antioxidants Antioxidants in the context of the present invention are any of the usual natural antioxidants which are used in particular in pharmaceutical products and in foods, including vitamin C and vitamin C derivatives such as, for example, ascorbyl palmitate, carotinoids, rosemary extracts and/or synthetic antioxidants such as, for example, BHA, BHT, TBHQ or gallates and, in particular, various vitamin E derivatives, such as Coviox® T 70 for example.
Uses The triglycerides according to the invention are particularly suitable for use in foods, preferably so-called functional foods, and in pharmaceutical products, more especially as a supporting agent in i the treatment of tumours or even in the treatment of patients suffering from catabolic conditions.
Sce the physiological properties of the triglycerides according to the invention are comparable with C07907 those of free conjugated linoleic acid both in human beings and in animals, the triglycerides are suitable for use in all those areas which are already known from the literature for conjugated linoleic acid.
Examples Production of a conjugated linoleic acid triglyceride Example 1 92.1kg of glycerol and 841.5kg of conjugated linoleic acid were preheated under nitrogen to around 80°C and introduced into a reactor, after which 0.62kg of tin grindings were added with stirring. The reactor was then evacuated to 30mbar, stirred for 10 minutes and blanketed with nitrogen. Heating was carried out under nitrogen at a rate of 1K per minute, the temperature reaching 150°C after 1 hour. At the same time, the pressure was reduced to 800mmbar. The temperature was then increased to 210°C over a period of another hour and the reaction mixture was stirred at that temperature for 2 hours. The reaction mixture was then re-evacuated to 30mmbar over a period of minutes and stirred until an acid value of 15 had been reached. The reaction mixture was then cooled in vacuo to 90°C and purged with nitrogen, after which phosphoric acid was added to precipitate the catalyst. After stirring for 15 minutes and after the addition of Perlite, the reaction mixture was filtered through a filter press into a nitrogen-purged receiver to which 0.1wt% of Coviox T-70 was added as stabiliser.
Example 2 The procedure was as in Example 1, except that the crude product was deodorised in a thinevaporator at 230°C in the presence of stripping steam. Another 0.2wt% of Coviox T-70 was added to the end product for stabilisation.
Glyceride composition Example 3 A glyceride prepared as described in Example 1 has the following composition: triglyceride of conjugated linoleic acid: diglyceride of conjugated linoleic acid 3wt% monoglyceride of conjugated linoleic acid: 2wt% The acid value was 2, the hydroxyl value 25 and the peroxide number 2.
C07907
Claims (12)
1. Synthetic triglycerides corresponding to formula O R 2 R/- 0 OR3 in which R 1 R 2 and R 3 independently of one another represent C 6 -24 fatty acid residues, with the proviso that at least one substituent R 1 R 2 or R 3 is a conjugated linoleic acid residue.
2. Synthetic triglycerides as claimed in claim 1, wherein R 1 R 2 and R 3 represent a conjugated linoleic acid residue.
3. Synthetic triglycerides, substantially as hereinbefore described with reference to any one of the examples.
4. A process for the production of synthetic triglycerides which contain at least one conjugated linoleic acid residue by esterification of glycerol or transesterification of triglycerides with fatty acid mixtures, wherein a) fatty acid mixtures containing at least 50wt% of conjugated linoleic acid are used and b) the reaction is carried out in an inert gas atmosphere. is
5. A process as claimed in claim 4, wherein the reaction mixture is heated to a reaction temperature of 180 to 240*C at a heating rate of 0.5 to 5K per minute.
6. A process as claimed in claim 5, wherein the heating rate is 0.5 to 3K per minute.
7. A process as claimed in any one of claims 4 to 6, wherein 0.01 to lwt% of an antioxidant is added to the reaction mixture after the esterification or transesterification. 20
8. A process as claimed in any one of claims 4 to 7, wherein the crude reaction mixture is purified in a thin-layer evaporator.
9. A process for the production of synthetic triglycerides by esterification of glycerol or transesterification of triglycerides with fatty acid mixtures, said process being substantially as e hereinbefore described with reference to any one of the examples. 25
10. Synthetic triglycerides produced by the process of any one of claims 4 to 9.
:11. The use of the triglycerides according to any one of claims 1 to 3 or 10 as food additives.
12. The use of the triglycerides according to any one of claims 1 to 3 or 10 as active Ssubstances for the production of pharmaceutical products. Dated 16 May 2001 COGNIS DEUTSCHLAND GMBH Patent Attorneys for the Applicant/Nominated Person SPRUSON FERGUSON OPFIC C07907
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DE19718245A DE19718245C5 (en) | 1997-04-30 | 1997-04-30 | Synthetic triglycerides based on conjugated linoleic acid, process for their preparation and their use |
DE19718245 | 1997-04-30 | ||
PCT/EP1998/002332 WO1998049129A1 (en) | 1997-04-30 | 1998-04-21 | Conjugated linolenic acid-based synthetic triglycerides |
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AU735493B2 true AU735493B2 (en) | 2001-07-12 |
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JP (1) | JP4217798B2 (en) |
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WO (1) | WO1998049129A1 (en) |
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US5017614A (en) * | 1989-02-17 | 1991-05-21 | Wisconsin Alumni Research Foundation | Methods of preventing oxidation, quenching singlet oxygen and inhibiting mold growth and novel compositions therefor |
US5208356A (en) * | 1989-02-17 | 1993-05-04 | Wisconsin Alumni Research Foundation | Octadecadienoic phospholipic esters, antioxidant and mold inhibiting compositions |
US5554646A (en) * | 1992-04-29 | 1996-09-10 | Wisconsin Alumni Research Foundation | Method for reducing body fat in animals |
US5428072A (en) * | 1992-04-29 | 1995-06-27 | Wisconsin Alumni Research Foundation | Method of increasing the efficiency of feed conversion in animals |
US5430066A (en) * | 1992-04-29 | 1995-07-04 | Wisconsin Alumni Research Foundation | Methods for preventing weight loss, reduction in weight gain, and anorexia due to immune stimulation |
JP3138358B2 (en) * | 1993-03-31 | 2001-02-26 | 雪印乳業株式会社 | Method for producing conjugated linoleic acid and food containing the same |
MY118354A (en) * | 1995-05-01 | 2004-10-30 | Scarista Ltd | 1,3-propane diol derivatives as bioactive compounds |
DE69609196T3 (en) * | 1995-11-14 | 2006-01-26 | Loders Croklaan B.V. | Process for the preparation of high isomers of conjugated linoleic acid |
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1997
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1998
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