JP5047507B2 - Carnitine derivatives and salts thereof, skin external preparations and cosmetics - Google Patents

Description

The present invention relates to a skin external preparation and a cosmetic. More specifically, the present invention relates to a skin external preparation and cosmetics containing a carnitine derivative and / or a salt thereof and having an effect of promoting lipid metabolism, and further relates to a novel carnitine derivative and a salt thereof.

  It is well known that carnitine has an important role in human lipid metabolism. Carnitine is an essential component for lipid metabolism in living organisms, acting as a carrier that carries fatty acids into the mitochondria of intracellular organs where fat burns. is there. Fatty acids are subjected to β-oxidation in the mitochondria and converted to biological energy in the form of ATP.

  On the other hand, lipid is important not only as an energy source but also as a constituent of the human body. All cell membranes are composed of lipids, and in the macro form, such as sebum and intercellular lipids, have the function of regulating water evaporation outside the body.

  However, the presence of excess lipid is not only obesity due to subcutaneous fat accumulation, but also cellulite formation, skin surface shine and stickiness due to excess sebum, seborrheic dermatitis, hair loss associated with seborrheic dermatitis, acne, body odor In particular, it causes many problems from the viewpoint of beauty and QOL (Quality Of Life), such as aging of the skin accompanying a decrease in lipid metabolism.

  As described above, for lipid metabolism, fatty acids need to be taken into mitochondria, and carnitine is essential for the uptake. Therefore, the rate of lipid metabolism depends on the amount of carnitine present in the cell. Increasing the concentration of carnitine in the tissue that wants to promote lipid metabolism leads to the promotion of lipid metabolism, preventing excess lipid and thus eliminating trouble caused by excess lipid. It is considered useful.

  For this reason, various investigations and proposals have been made to promote the metabolism of lipids by blending carnitine or the like into an external preparation for skin and promoting lipid metabolism (see Patent Documents 1 to 4). However, these were all using L-carnitine or a salt thereof, and a satisfactory effect was not obtained. This is because L-carnitine and its salts have high hydration properties, and as such, skin affinity and transdermal absorbability are insufficient, and a sufficient amount can be reached to the tissues that undergo lipid metabolism. This is considered to be difficult.

In contrast, for the purpose of enhancing the action of carnitine as a component of a skin external preparation, a slimming skin external preparation containing linear acylcarnitine obtained by modifying carnitine with a linear fatty acid residue has been proposed. For example, a slimming skin external preparation containing palmitoyl-L-carnitine (L-carnitine palmitate), carnitine, caffeine, and coenzyme A has been disclosed (see Patent Document 5).
Japanese Patent No. 3434995 Japanese Patent Laid-Open No. 7-309711 JP 2000-16916 A JP 2001-64147 A French Patent Invention No. 2694195

  However, while the above-mentioned linear acylcarnitine reaches the subcutaneous layer and exhibits an excellent effect of promoting lipid metabolism, the linear acyl group is easily hydrolyzed and is an aqueous preparation frequently used in skin external preparations, particularly cosmetics. There was a problem that decomposition was easy to proceed, the storage stability of the product was poor, and the product life was short.

An object of the present invention is to solve such problems, and to provide an external preparation for skin and a cosmetic that have excellent storage stability, a long product life, and excellent skin affinity and transdermal absorbability.
Furthermore, another object of the present invention is to provide a novel carnitine derivative and a salt thereof that are hardly hydrolyzed even in the presence of an aqueous medium.

  As a result of intensive studies, the present inventors have found that a carnitine derivative into which an α-branched acyl group has been introduced, particularly L-carnitine 2-hexyldecanoate, 2-methylpalmitate, 2-butyloctanoate, etc. Has been found to be excellent in stability in the presence of an aqueous medium, and the present invention has been completed based on this finding. That is, the present invention includes the following items [1] to [26].

  [1] A skin external preparation characterized by containing a carnitine derivative represented by the following formula (1) and / or a salt of a carnitine derivative represented by the following formula (2);

(In formula (1), R ¹ and R ² each independently represents a saturated or unsaturated aliphatic hydrocarbon group having 1 to 18 carbon atoms which may have a branch.)

(In formula (2), R ¹ and R ² have the same meanings as in formula (1), X ⁻ represents an inorganic or organic anion that is electrically neutral with the cation moiety of the carnitine derivative, and Y ⁺ represents carnitine. An inorganic cation or an organic cation that is electrically neutral with the anion portion of the derivative.)

[2] In the above formulas (1) and (2), R ¹ and R ² are each independently a saturated or unsaturated aliphatic hydrocarbon group having 3 to 16 carbon atoms which may have a branch. The external preparation for skin according to [1], wherein

[3] In Formulas (1) and (2), either R ¹ or R ² is a straight-chain alkyl group having 6 carbon atoms, and the other is a straight-chain alkyl group having 8 carbon atoms. [1] The external skin preparation according to [1].

[4] In Formulas (1) and (2), either R ¹ or R ² is a linear alkyl group having 4 carbon atoms, and the other is a linear alkyl group having 6 carbon atoms. [1] The external skin preparation according to [1].

[5] In the above formulas (1) and (2), one of R ¹ and R ² is a methyl group, and the other is a linear alkyl group having 14 carbon atoms [1] ] The external preparation for skin described in the above.

[6] X ⁻ in the formula (2) is a hydroxide ion, nitrate ion, sulfate ion, carbonate ion, bicarbonate ion, halide ion, formate ion, acetate ion, citrate ion, tartrate ion, sulphate From an anion of an acid ion, a fumarate ion, a C3-C20 saturated or unsaturated fatty acid which may have a branch, an anion of carnitine or a derivative thereof, an anion of ascorbic acid, an anion of ascorbyl phosphate or a derivative thereof The skin external preparation according to any one of [1] to [5], which is selected from the group consisting of:

[7] Y ⁺ in the formula (2) is selected from the group consisting of hydrogen ions, sodium ions, potassium ions, calcium ions, magnesium ions, zinc ions, ammonium ions, carnitine or cations of derivatives thereof. The external preparation for skin according to any one of [1] to [6], wherein

  [8] A carnitine derivative represented by the formula (1) and / or a salt of the carnitine derivative represented by the formula (2) is contained in an amount of 0.01 to 20% by mass. [7] The external preparation for skin according to any one of [7].

  [9] A cosmetic comprising the carnitine derivative and / or carnitine derivative salt described in any one of [1] to [7] in an amount of 0.01 to 20% by mass.

  [10] The cosmetic according to [9], which is a cosmetic for promoting lipid metabolism.

  [11] A carnitine derivative represented by the following formula (3);

(In Formula (3), any one of R ³ and R ⁴ is a saturated aliphatic hydrocarbon group having 1 to 16 carbon atoms which may have a branch, and the other may have a branch. Represents a saturated aliphatic hydrocarbon group having 8 to 16 carbon atoms).

  [12] A salt of a carnitine derivative represented by the following formula (4):

(In the formula (4), R ³ and R ⁴ are either saturated aliphatic 1-16 carbon atoms which may have a branched hydrocarbon group, the other may be branched Represents a saturated aliphatic hydrocarbon group having 8 to 16 carbon atoms, X ⁻ represents an inorganic anion or an organic anion that is electrically neutral with the cation portion of the carnitine derivative, and Y ⁺ is electrically connected to the anion portion of the carnitine derivative. Represents a neutral inorganic cation or organic cation.

  [13] A carnitine derivative represented by the following formula (5);

(In Formula (5), any one of R ⁵ and R ⁶ is a saturated aliphatic hydrocarbon group having 2 to 7 carbon atoms which may have a branch, and the other may have a branch. Represents a saturated aliphatic hydrocarbon group having 3 to 7 carbon atoms).

  [14] A carnitine derivative salt represented by the following formula (6):

(In Formula (6), either R ⁵ or R ⁶ is a saturated aliphatic hydrocarbon group having 2 to 7 carbon atoms which may have a branch, and the other may have a branch. Represents a saturated aliphatic hydrocarbon group having 3 to 7 carbon atoms, X ⁻ represents an inorganic anion or an organic anion which is electrically neutral with the cation portion of the carnitine derivative, and Y ⁺ represents an anion portion of the carnitine derivative Represents a neutral inorganic cation or organic cation.

  [15] A carnitine derivative represented by the following formula (7):

  [16] A salt of a carnitine derivative represented by the following formula (8);

(In formula (8), X ⁻ represents an inorganic anion or an organic anion that is electrically neutral with the cation part of the carnitine derivative, and Y ⁺ is an inorganic cation or an electric cation that is electrically neutral with the anion part of the carnitine derivative. Represents an organic cation).

[17] X ⁻ in the formula (8) is a hydroxide ion, nitrate ion, sulfate ion, carbonate ion, bicarbonate ion, halide ion, formate ion, acetate ion, citrate ion, tartrate ion, sulphate From an anion of an acid ion, a fumarate ion, a C3-C20 saturated or unsaturated fatty acid which may have a branch, an anion of carnitine or a derivative thereof, an anion of ascorbic acid, an anion of ascorbyl phosphate or a derivative thereof The salt of carnitine derivative according to [16], which is selected from the group consisting of

[18] Y ⁺ in the formula (8) is a hydrogen ion, a sodium ion, a potassium ion,
The salt of a carnitine derivative according to [16] or [17], which is selected from the group consisting of calcium ion, magnesium ion, zinc ion, ammonium ion, carnitine or a cation of a derivative thereof.

  [19] A carnitine derivative represented by the following formula (9):

  [20] A salt of a carnitine derivative represented by the following formula (10):

(In formula (10), X ⁻ represents an inorganic anion or an organic anion that is electrically neutral with the cation part of the carnitine derivative, and Y ⁺ is an inorganic cation or an electric cation that is electrically neutral with the anion part of the carnitine derivative. Represents an organic cation).

[21] X ⁻ in the formula (10) is a hydroxide ion, nitrate ion, sulfate ion, carbonate ion, bicarbonate ion, halide ion, formate ion, acetate ion, citrate ion, tartrate ion, sulphate From an anion of an acid ion, a fumarate ion, a C3-C20 saturated or unsaturated fatty acid which may have a branch, an anion of carnitine or a derivative thereof, an anion of ascorbic acid, an anion of ascorbyl phosphate or a derivative thereof The salt of carnitine derivative according to [20], which is selected from the group consisting of

[22] Y ⁺ in the formula (10) is selected from the group consisting of hydrogen ions, sodium ions, potassium ions, calcium ions, magnesium ions, zinc ions, ammonium ions, carnitine or cations of derivatives thereof. The salt of a carnitine derivative according to [20] or [21], wherein

  [23] A carnitine derivative represented by the following formula (11):

  [24] A salt of a carnitine derivative represented by the following formula (12);

(In the formula (12), X ⁻ represents an inorganic anion or an organic anion that is electrically neutral with the cation part of the carnitine derivative, and Y ⁺ is an inorganic cation or an electric cation that is electrically neutral with the anion part of the carnitine derivative. Represents an organic cation).

[25] X ⁻ in the formula (12) is a hydroxide ion, nitrate ion, sulfate ion, carbonate ion, bicarbonate ion, halide ion, formate ion, acetate ion, citrate ion, tartrate ion, sulphate From an anion of an acid ion, a fumarate ion, a C3-C20 saturated or unsaturated fatty acid which may have a branch, an anion of carnitine or a derivative thereof, an anion of ascorbic acid, an anion of ascorbyl phosphate or a derivative thereof The salt of carnitine derivative according to [24], which is selected from the group consisting of

[26] Y ⁺ in the formula (12) is selected from the group consisting of hydrogen ion, sodium ion, potassium ion, calcium ion, magnesium ion, zinc ion, ammonium ion, carnitine or a cation of a derivative thereof. The salt of a carnitine derivative according to [24] or [25], wherein

According to the external preparation for skin and cosmetics of the present invention, the degradation of the carnitine derivative is suppressed even in the presence of an aqueous medium and the product life is long. Therefore, the carnitine derivative and the salt-derived carnitine derivative formulated in the product The effects (excellent skin affinity and transdermal absorbability, and lipid metabolism promoting effect after reaching the tissue) can be stably obtained over a long period of time.

Therefore, the external preparation for skin and cosmetics of the present invention can be suitably used as an external preparation for skin and cosmetics for promoting lipid metabolism.
Furthermore, according to the present invention, it is possible to provide a novel carnitine derivative and a salt thereof that are hardly hydrolyzed even in the presence of an aqueous medium.

Hereinafter, the present invention will be specifically described.
The skin external preparation and cosmetic of the present invention contain a specific carnitine derivative and / or a salt thereof. That is, the external preparation for skin and cosmetics of the present invention may contain a specific carnitine derivative, may contain a salt of a specific carnitine derivative, or contain both a specific carnitine derivative and its salt. You may do it.

<Carnitine derivative>
The carnitine derivative used in the external preparation for skin and cosmetics of the present invention is a compound represented by the following formula (1).

In the formula (1) represents an aliphatic hydrocarbon group of R ¹ and R ² are each independently of 1 to 18 carbon atoms which may have a branched saturated or unsaturated. R ¹ and R ² are either a saturated or unsaturated aliphatic hydrocarbon group having 1 to 16 carbon atoms that may have a branch, and the other carbon that may have a branch. A saturated or unsaturated aliphatic hydrocarbon group of 3 to 16 is preferable. Further, R ¹ and R ² are each preferably a saturated or unsaturated aliphatic hydrocarbon group having 3 to 16 carbon atoms which may be independently branched, and each independently has a branch. More preferably, it is a saturated or unsaturated aliphatic hydrocarbon group having 4 to 12 carbon atoms which may be used.

In addition, the carnitine site | part of this carnitine derivative is a L type normally. Moreover, the carnitine derivative, R ¹ and because it has α- branched acyl group having a R ^2, R ¹ and R ² are the α carbon atom of the branching point in the case of different asymmetric carbon atoms Thus, optical isomers exist, but are not particularly limited, and any of them may be used, or a mixture of these optical isomers may be used.

Since the carnitine derivative has an α-branched acyl group having R ¹ and R ² , the acyl group is effective in reducing the electron donating property to the ester bond site by the branched chain even in the presence of an aqueous medium. It is considered that the group is hardly hydrolyzed and can exist stably over a long period of time.

Specific examples of the saturated aliphatic hydrocarbon group include, for example, methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, tert-butyl group, n- Pentyl group, n-hexyl group, 2-methylpentyl group, 3-methylpentyl group, 4-methylpentyl group, 2-ethylbutyl group, n-heptyl group, 2-methylhexyl group, 3-methylhexyl group, 4 -Methylhexyl group, 2-ethylpentyl group, 3-ethylpentyl group, n-octyl group, 2-methylheptyl group, 3-methylheptyl group, 4-methylheptyl group, 5-methylheptyl group, 6-methylheptyl Group, 2-ethylhexyl group, 3-ethylhexyl group, 4-ethylhexyl group, 2-propylpentyl group, n-nonyl group, n-decyl group, n-undecyl group, Examples include linear or branched alkyl groups such as n-dodecyl group, n-tridecyl group, n-tetradecyl group, n-pentadecyl group, n-hexadecyl group, n-heptadecyl group, n-octadecyl group, and isostearyl group. It is done.

  Specific examples of the unsaturated aliphatic hydrocarbon group include 10-undecenyl group, 9-hexadecenyl group, cis-9-octadecenyl group, 11-octadecenyl group, cis, cis-9,12-octa. Linear or branched alkenyl groups such as a decadienyl group, a 9,12,15-octadecatrienyl group, a 6,9,12-octadecatrienyl group, and a 9,11,13-octadecatrienyl group; Can be mentioned.

Among these, the combination of preferred R ¹ and R ^2, R ¹ and R ² is a methyl group and a methyl group, a methyl group and an ethyl group, a methyl group and n- propyl group, a methyl group and an isopropyl group, methyl Group and n-butyl group, methyl group and n-pentyl group, methyl group and n-hexyl group, methyl group and n-octyl group, methyl group and n-decyl group, methyl group and n-tetradecyl group, methyl group and n-hexadecyl group, ethyl group and ethyl group, ethyl group and n-propyl group, ethyl group and isopropyl group, ethyl group and n-butyl group, ethyl group and isopropyl group, ethyl group and n-butyl group, ethyl group and n-pentyl group, ethyl group and n-hexyl group, ethyl group and n-octyl group, ethyl group and n-decyl group, ethyl group and n-tetradecyl group, ethyl group and n-hexadecyl group, n-propyl And n-propyl group, n-propyl group and n-butyl group, n-propyl group and n-pentyl group, n-propyl group and n-hexyl group, n-butyl group and n-hexyl group, n-butyl group And a combination of n-octyl group, n-hexyl group and n-octyl group. Incidentally, the skin external preparation and a cosmetic of the present invention may be used carnitine derivatives specified by the combination of the R ¹ and R ² singly or may be used in combination of two or more kinds.

  The carnitine derivative represented by the above formula (1) includes not only known compounds but also novel compounds. Hereinafter, some of the new carnitine derivatives will be described.

  One aspect of the novel carnitine derivative of the present invention is a compound represented by the following formula (3).

In formula (3), R ³ and R ⁴ are each a saturated aliphatic hydrocarbon group having 1 to 16 carbon atoms that may have a branch, and the other carbon that may have a branch. It represents a saturated aliphatic hydrocarbon group of formula 8-16.

Specific examples of the saturated aliphatic hydrocarbon group having 1 to 16 carbon atoms include, for example, methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, tert -Butyl group, n-pentyl group, n-hexyl group, 2-methylpentyl group, 3-methylpentyl group, 4-methylpentyl group, 2-ethylbutyl group, n-heptyl group, 2-methylhexyl group, 3 -Methylhexyl group, 4-methylhexyl group, 2-ethylpentyl group, 3-ethylpentyl group, n-octyl group, 2-methylheptyl group, 3-methylheptyl group, 4-methylheptyl group, 5-methylheptyl group Group, 6-methylheptyl group, 2-ethylhexyl group, 3-ethylhexyl group, 4-ethylhexyl group, 2-propylpentyl group, n-nonyl group, n-decyl group, n Examples thereof include linear or branched alkyl groups such as -undecyl group, n-dodecyl group, n-tridecyl group, n-tetradecyl group, n-pentadecyl group and n-hexadecyl group. Examples of the saturated aliphatic hydrocarbon group having 8 to 16 carbon atoms include n-octyl group, 2-methylheptyl group, 3-methylheptyl group, 4-methylheptyl group, 5-methylheptyl group, 6-methyl Heptyl, 2-ethylhexyl, 3-ethylhexyl, 4-ethylhexyl, 2-propylpentyl, n-nonyl, n-decyl, n-undecyl, n-dodecyl, n-tridecyl, n -Linear or branched alkyl groups, such as a tetradecyl group, n-pentadecyl group, n-hexadecyl group, are mentioned.

  Another embodiment of the novel carnitine derivative of the present invention is a compound represented by the following formula (5).

In Formula (5), R ⁵ and R ⁶ are each a saturated aliphatic hydrocarbon group having 2 to 7 carbon atoms that may have a branch, and the other carbon that may have a branch. Represents a saturated aliphatic hydrocarbon group of formula 3-7.

Specific examples of the saturated aliphatic hydrocarbon group having 2 to 7 carbon atoms include, for example, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, tert-
Butyl group, n-pentyl group, n-hexyl group, 2-methylpentyl group, 3-methylpentyl group, 4-methylpentyl group, 2-ethylbutyl group, n-heptyl group, 2-methylhexyl group, 3- Examples thereof include linear or branched alkyl groups such as methylhexyl group, 4-methylhexyl group, 2-ethylpentyl group, and 3-ethylpentyl group. Examples of the saturated aliphatic hydrocarbon group having 3 to 7 carbon atoms include n-propyl group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, tert-butyl group, n-pentyl group, n -Hexyl group, 2-
Methylpentyl group, 3-methylpentyl group, 4-methylpentyl group, 2-ethylbutyl group, n-heptyl group, 2-methylhexyl group, 3-methylhexyl group, 4-methylhexyl group, 2-ethylpentyl group And a linear or branched alkyl group such as 3-ethylpentyl group.

Among these, from the viewpoint of excellent skin affinity, as a combination of R ⁵ and R ⁶ , an ethyl group and n-pentyl group, an ethyl group and n-hexyl group, an ethyl group and n-heptyl group, n-propyl Group and n-butyl group, n-propyl group and n-pentyl group, n-propyl group and n-hexyl group, n-propyl group and n-heptyl group, n-butyl group and n-butyl group, n- Butyl group and n-pentyl group, n-butyl group and n-hexyl group, n-butyl group and n-heptyl group, n-pentyl group and n-pentyl group, n-pentyl group and n-hexyl group, Preferred examples include n-pentyl group and n-heptyl group, n-hexyl group and n-hexyl group, n-hexyl group and n-heptyl group, and n-heptyl group and n-heptyl group.

Among these, from the viewpoint that the stability in the presence of an aqueous medium is remarkably excellent, either ^one of R ¹ and R ^{2 in} formula (1) or R ³ and R ^{4 in} formula (3) is A carnitine derivative specified by a combination of a straight-chain alkyl group having 6 carbon atoms and the other being a straight-chain alkyl group having 8 carbon atoms, that is, a combination of an n-hexyl group and an n-octyl group, Particularly preferred is L-carnitine 2-hexyldecanoate represented by the following formula (7).

As other preferable carnitine derivatives, one of R ¹ and R ^{2 in} formula (1) or R ³ and R ^{4 in} formula (3) is a methyl group, and the other is carbon number. A carnitine derivative specified by a combination of 14 linear alkyl groups (n-tetradecyl group), specifically, L-carnitine 2-methylpalmitate represented by the following formula (9); A combination of R ¹ and R ² , or R ⁵ and R ^{6 in} formula (5), wherein either one is a linear alkyl group having 4 carbon atoms and the other is a linear alkyl group having 6 carbon atoms, That is, a carnitine derivative specified by a combination of an n-butyl group and an n-hexyl group, specifically, 2-butyloctanoic acid L-carnitine represented by the following formula (11) can be given.

<Salt of carnitine derivative>
Moreover, the salt of the carnitine derivative used for the skin external preparation and cosmetics of this invention is a compound shown by following formula (2).

In formula (2), X ⁻ represents an inorganic anion or organic anion that is electrically neutral with the cation moiety of the carnitine derivative, and is preferably a medically acceptable anion. Inorganic ions such as chloride ions, nitrate ions, sulfate ions, carbonate ions, hydrogen carbonate ions and halides; formate ions, acetate ions, citrate ions, tartaric acid ions, oxalate ions, fumarate ions, branches And an organic ion such as an anion of a saturated or unsaturated fatty acid having 3 to 20 carbon atoms, an anion of carnitine or a derivative thereof, an anion of ascorbic acid, an anion of ascorbyl phosphate or a derivative thereof. Among these, hydroxide ions, halide ions, citrate ions, carnitine or anions of derivatives thereof are preferable from the viewpoint of formulation as a skin external preparation, particularly cosmetics.

In formula (2), Y ⁺ represents an inorganic cation or an organic cation that is electrically neutral with the anion portion of the carnitine derivative, and is preferably a medically acceptable cation. Specific examples thereof include, for example, hydrogen And cations of ions, sodium ions, potassium ions, calcium ions, magnesium ions, zinc ions, ammonium ions, carnitine, or derivatives thereof. Among these, a cation of hydrogen ion, sodium ion, potassium ion, carnitine or a derivative thereof is preferable from the viewpoint of compounding properties as an external preparation for skin, particularly cosmetics.

In formula (2), R ¹ and R ² have the same meaning as in formula (1).
In the skin external preparation and cosmetics of the present invention, a salt of a carnitine derivative specified by a combination with the above-mentioned X ⁻ , Y ⁺ , R ¹ and R ² may be used alone or in combination of two or more. May be used.

  The salt of the carnitine derivative represented by the above formula (2) includes not only known compounds but also novel compounds. Hereinafter, some of the salts of the new carnitine derivatives among the salts of the carnitine derivatives will be described.

  One aspect of the salt of the novel carnitine derivative of the present invention is a compound represented by the following formula (4).

In the formula (4), R ³ and R ⁴ have the same meaning as in the above formula (3), and X ⁻ and Y ⁺ have the same meaning as in the above formula (2).

  Another embodiment of the salt of the novel carnitine derivative of the present invention is a compound represented by the following formula (6).

In the formula (6), R ⁵ and R ⁶ have the same meaning as in the above formula (5), and X ⁻ and Y ⁺ have the same meaning as in the above formula (2).
Among these, R ¹ and R ^{2 in} the formula (2) or R ³ in the formula (4) and R ³ in the formula (4) are particularly excellent in the stability of the carnitine derivative derived from the salt in the presence of an aqueous medium. One of R ⁴ is a combination of a straight-chain alkyl group having 6 carbon atoms and the other is a straight-chain alkyl group having 8 carbon atoms, that is, a combination of n-hexyl group and n-octyl group. Particularly preferred is a salt of a carnitine derivative, specifically a salt of L-carnitine 2-hexyldecanoate represented by the following formula (8).

Here, X ⁻ and Y ⁺ in the formula (8) have the same meanings as those in the formula (2).
As other preferred carnitine derivative salts, ^one of R ¹ and R ^{2 in} formula (2) or R ³ and R ^{4 in} formula (4) is a methyl group, and the other is A salt of a carnitine derivative specified by a combination which is a linear alkyl group having 14 carbon atoms (n-tetradecyl group), specifically, a salt of L-carnitine 2-methylpalmitate represented by the following formula (10); ^One of R ¹ and R ^{2 in} formula (2) or R ⁵ and R ^{6 in} formula (6) is a linear alkyl group having 4 carbon atoms, and the other is a linear chain having 6 carbon atoms. A combination of alkyl groups, that is, a salt of a carnitine derivative specified by a combination of an n-butyl group and an n-hexyl group, specifically, 2-butyloctanoic acid L-carnitine represented by the following formula (12) And the like.

Here, X ⁻ and Y ⁺ in the formulas (10) and (12) have the same meanings as those in the above formula (2).
<Production of carnitine derivatives and salts thereof>
The carnitine derivatives and salts thereof used in the external preparation for skin and cosmetics of the present invention can be synthesized by using a commercially available L-carnitine as a raw material, for example, by reaction of L-carnitine and fatty acid chloride.

  The production of 2-hexyldecanoic acid L-carnitine hydrochloride will be described as an example as follows. First, L-carnitine and 2-hexyldecanoic acid chloride are mixed in trifluoroacetic acid, heated and stirred at 50 to 80 ° C., and after the reaction, trifluoroacetic acid is distilled off by evaporation. Next, petroleum ether is added to the resulting residue, and the residue is recovered. After adding water to quench the acid chloride, ethanol and diethyl ether are added for extraction, and the water-ethanol layer is separated. Furthermore, after adding n-butanol and washing | cleaning suitably with water, 2-hexyl decanoic acid L-carnitine hydrochloride is obtained by distilling off n-butanol.

  The carnitine derivative used in the production of the carnitine derivative and its salt of the present invention includes an intramolecular salt; an inorganic salt such as hydrochloride or sodium salt; and an organic salt such as oxalate, tartrate or fumarate. It is done.

<External preparation for skin, cosmetics>
The external preparation for skin and cosmetics of the present invention, especially cosmetics for improving lipid metabolism, are characterized by containing the carnitine derivative and / or a salt thereof. The cosmetic for improving lipid metabolism is cosmetic for the purpose of improving / preventing skin disorders, aging, obesity and the like related to the presence of excess lipids or a decrease in lipid metabolism. Specific examples of the purpose include slimming, anti-cellulite, skin tightening, prevention of shine, stickiness and makeup collapse due to excessive sebum, improvement of seborrheic dermatitis, prevention of hair loss associated with seborrheic dermatitis, anti-acne , Prevention of body odor, prevention of skin aging by activation of lipid energy conversion, activation, skin care, and the like.

In the skin external preparation of the present invention, the carnitine derivative and / or salt thereof is usually 0.01 to 20% by mass, preferably 0.05 to 12% by mass, more preferably 0.1 to 5% in the total amount of the skin external preparation. It is blended so as to be contained in an amount of mass%. When the carnitine derivative is used alone, the content is the amount of the carnitine derivative, and when the carnitine derivative salt is used alone, the amount of the carnitine derivative salt is used together. Means the total amount of the carnitine derivative and its salt.

  When the amount of carnitine derivative and / or salt thereof is contained in the external preparation for skin in such an amount, it is preferable that the transfer to the skin is quick and the efficacy effect required for the external preparation for skin can be exhibited.

Further, in the cosmetic of the present invention and the cosmetic for improving lipid metabolism, the content of the carnitine derivative and / or its salt is preferably the same as that of the external preparation for skin of the present invention.
In addition to the above-mentioned carnitine derivative and / or salt thereof, components generally used in skin external preparations or cosmetics may be added to the skin external preparation and cosmetics of the present invention as long as the effects of the present invention are not impaired.

As a component which can be mix | blended, the following components are mentioned, for example.
Hydrocarbons: for example, ozokerite, α-olefin oligomer, light isoparaffin, light liquid isoparaffin, squalene, squalane, synthetic squalane, vegetable squalane, ceresin, paraffin, polyethylene powder, polybutene, microcrystalline wax, liquid isoparaffin, liquid paraffin, Mineral oil, petrolatum etc.

  Natural fats and oils: For example, jojoba oil, carnauba wax, candelilla wax, rice bran wax, shellac, lanolin, mink sebum wax, whale wax, sugarcane wax, sperm whale oil, beeswax, montan wax and other natural waxes, avocado oil, almond oil, Olive oil, extra virgin olive oil, sesame oil, rice bran oil, rice oil, rice germ oil, corn oil, soybean oil, corn oil, persic oil, palm kernel oil, palm oil, castor oil, grape seed oil, cottonseed oil, palm oil, water Palm oil, beef tallow, hydrogenated oil, horse oil, mink oil, egg yolk oil, egg yolk fat oil, rosehip oil, kukui nut oil, evening primrose oil, wheat germ oil, peanut oil, camellia oil, sasanca oil, cacao butter, moclaw, Beef bone fat, beef leg oil, pork fat, horse fat, sheep fat, shea butter, macadamia nut oil, Meadow home oil, etc.

  Fatty acids: For example, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, isostearic acid, 12-hydroxystearic acid, undecylenic acid, coconut oil fatty acid and the like.

  Higher alcohols: for example, isostearyl alcohol, octyldodecanol, hexyldecanol, cholesterol, phytosterol, lauryl alcohol, myristyl alcohol, cetanol, stearyl alcohol, oleyl alcohol, behenyl alcohol, cetostearyl alcohol and the like.

  Alkyl glyceryl ethers: For example, batyl alcohol, chimyl alcohol, seraalkyl alcohol, isostearyl glyceryl ether and the like.

Esters: for example, isopropyl myristate, butyl myristate, isopropyl palmitate, ethyl stearate, butyl stearate, ethyl oleate, ethyl linoleate, isopropyl linoleate, cetyl caprylate, hexyl laurate, isooctyl myristate, myristine Decyl acid, myristyl myristate, cetyl myristate, octadecyl myristate, cetyl palmitate, stearyl stearate, decyl oleate, oleyl oleate, cetyl ricinoleate, isostearyl myristate, isotridecyl myristate, isocetyl myristate, myristic acid Isostearyl, octyldodecyl myristate, 2-ethylhexyl palmitate, isocetyl palmitate, isostearyl palmitate 2-ethylhexyl stearate, isocetyl stearate, isodecyl oleate, octyldodecyl oleate, octyldodecyl ricinoleate,

Ethyl isostearate, isopropyl isostearate, cetyl 2-ethylhexanoate, cetostearyl 2-ethylhexanoate, stearyl 2-ethylhexanoate, hexyl isostearate, ethylene glycol dioctanoate, ethylene glycol dioleate, propylene glycol dicaprylate, di (Capryle capric acid) propylene glycol, propylene glycol dicaprate, propylene glycol dioleate, neopentyl glycol dicaprate, neopentyl glycol dioctanoate, glyceryl tricaprylate, glyceryl tri-2-ethylhexanoate, tri (capryl capric acid) Glyceryl, tri (caprylic acid / capric acid / stearic acid) glyceryl, glyceryl triundecylate, glyceryl triisopalmitate Glyceryl triisostearate, tri-2-ethylhexanoate trimethylolpropane, trimethylolpropane triisostearate, tetra-2-ethylhexanoate pentaerythrityl tetra myristate pentaerythrityl,

Pentaerythrityl tetraisostearate, diglyceryl tetraisostearate, octyldodecyl neopentanoate, isocetyl octoate, isostearyl octoate, 2-ethylhexyl isoperargonate, hexyldecyl dimethyloctanoate, octyldodecyl dimethyloctanoate, isopalmitic acid 2-ethylhexyl, isocetyl isostearate, isostearyl isostearate, octyldodecyl isostearate, lauryl lactate, myristyl lactate, cetyl lactate, octyldodecyl lactate, triethyl citrate, acetyl triethyl citrate, acetyl tributyl citrate, trioctyl citrate, citrate Triisocetyl acid, trioctyldodecyl citrate, diisostearyl malate, 2-ethylstearate Sill, succinate di-2-ethylhexyl, diisopropyl adipate, diisobutyl adipate, dioctyl adipate, adipic acid di-heptyl undecyl, diethyl sebacate, diisopropyl sebacate, dioctyl sebacate,

  Cholesteryl stearate, cholesteryl isostearate, cholesteryl hydroxystearate, cholesteryl oleate, dihydrocholesteryl oleate, phytosteryl isostearate, phytosteryl oleate, isocetyl 12-stearoylhydroxystearate, stearyl 12-stearoylhydroxystearate, 12-stearoylhydroxy Isostearyl stearate, polyoxyethylene acetate (3) polyoxypropylene (1) cetyl ether, polyoxyethylene acetate (3) polyoxypropylene (1) isocetyl ether, isononyl isononanoate, octyl isononanoate, tridecyl isononanoate, Isotridecyl isononanoate and the like.

Silicone oils: for example, methylpolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, methylcyclopolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, octamethyltrisiloxane, deca Methyltetrasiloxane, tetradecamethylhexasiloxane, highly polymerized methylpolysiloxane, dimethylsiloxane / methyl (polyoxyethylene) siloxane / methyl (polyoxypropylene) siloxane copolymer, dimethylsiloxane / methyl (polyoxyethylene) siloxane copolymer Polymer, dimethylsiloxane / methyl (polyoxypropylene) siloxane copolymer, dimethylsiloxane / methylcetyloxysiloxane copolymer Body, dimethyl siloxane-methyl stearoxysiloxane copolymer, polyether-modified silicones, alcohol-modified silicones, alkyl-modified silicones, amino-modified silicones.

  Macromolecules: For example, sodium alginate, carrageenan, agar, fur celerane, guar gum, quince seed, konjac mannan, tamarind gum, tara gum, dextrin, starch, locust bean gum, gum arabic, gati gum, caraya gum, tragacanth gum, arabinogalactan, pectin Quince, chitosan, starch, curdlan, xanthan gum, gellan gum, cyclodextrin, dextran, pullulan, microcrystalline cellulose, methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, carboxymethylcellulose, carboxystarch, cationized cellulose, Starch phosphate ester, cationized guar gum, Rubokishimechiru Hydroxypropyl guar gum, hydroxypropylated guar gum, albumin, casein, gelatin, sodium polyacrylate, polyacrylic acid amide, carboxyvinyl polymers, polyethylene imine,

Highly polymerized polyethylene glycol, polyvinyl alcohol, polyvinyl pyrrolidone, polyvinyl ether, polyacrylamide, acrylic acid copolymer, methacrylic acid copolymer, maleic acid copolymer, vinyl pyridine copolymer, ethylene / acrylic acid copolymer, vinyl Pyrrolidone polymer, vinyl alcohol / vinyl pyrrolidone copolymer, nitrogen substituted acrylamide polymer, amino-modified silicone, cationized polymer, dimethylacrylammonium polymer, acrylic acid anion polymer, methacrylic acid anion polymer, modified silicone, acrylic acid Alkyl methacrylate (C ₁₀ -C ₃₀ ) copolymers, polyoxyethylene / polyoxypropylene copolymers, and the like.

  Lower alcohols: For example, ethanol, isopropyl alcohol, 1-butanol, 2-butanol, benzyl alcohol and the like.

Polyhydric alcohols: for example, ethylene glycol, diethylene glycol, polyethylene glycol, propylene glycol, polypropylene glycol, glycerin, diglycerin, polyglycerin, 1,3-butanediol, triethylene glycol, dipropylene glycol, 3-methyl-1, 3-butanediol, 1,2-pentanediol, 1,4-pentanediol, 1,5-pentanediol, 2,4-pentanediol, 2-methyl-2,4-pentanediol, 3-methyl-1,5 -Pentanediol, 1,2
-Hexanediol, 1,6-hexanediol and the like.

  Anionic surfactants: for example, coconut oil fatty acid potassium, coconut oil fatty acid sodium, coconut oil fatty acid triethanolamine, potassium laurate, sodium laurate, triethanolamine laurate, potassium myristate, sodium myristate, myristic acid Isopropanolamine, potassium palmitate, sodium palmitate, isopropanolamine palmitate, potassium stearate, sodium stearate, triethanolamine stearate, potassium oleate, sodium oleate, sodium castor oil fatty acid, zinc undecylenate, zinc laurate , Zinc myristate, magnesium myristate, zinc palmitate, zinc stearate, calcium stearate, magnesium stearate, Alin aluminum, calcium myristate, magnesium myristate, dimyristate, aluminum isostearate,

  Polyoxyethylene lauryl ether acetic acid, sodium polyoxyethylene lauryl ether acetate, polyoxyethylene tridecyl ether acetic acid, sodium polyoxyethylene tridecyl ether acetate, sodium stearoyl lactate, sodium isostearoyl lactate, sodium lauroyl sarcosine, coconut oil fatty acid sarcosine, Palm oil fatty acid sarcosine sodium, palm oil fatty acid sarcosine triethanolamine, lauroyl sarcosine, lauroyl sarcosine potassium, lauroyl sarcosine triethanolamine, oleoyl sarcosine, myristoyl sarcosine sodium, stearoyl glutamate sodium, coconut oil fatty acid acyl glutamate, coconut oil fatty acid acyl glutamate Potassium, palm oil fatty acid acyl glutamic acid Thorium, cocoyl glutamic acid triethanolamine, lauroyl acylglutamic acid, potassium lauroyl acylglutamate,

  Sodium lauroyl acyl glutamate, triethanolamine lauroyl acyl glutamate, myristoyl acyl glutamate, potassium myristoyl acyl glutamate, sodium myristoyl acyl glutamate, stearoyl acyl glutamate, potassium stearoyl acyl glutamate, disodium stearoyl acyl glutamate, sodium beef tallow fatty acid acyl glutamate, coconut oil Fatty acid / hardened beef tallow fatty acid sodium acylglutamate, coconut oil fatty acid methylalanine sodium, lauroylmethylalanine, lauroylmethylalanine sodium, lauroylmethylalanine triethanolamine, myristoylmethylalanine sodium, lauroylmethyltaurine sodium, coconut oil fatty acid methyltauri Potassium, coconut oil fatty acid methyl taurine sodium, coconut oil fatty acid methyl taurine magnesium, myristoyl methyl taurine sodium,

Palmitoyl methyl taurine sodium, stearoyl methyl taurine sodium, oleoyl methyl taurine sodium, sodium alkane sulfonate, sodium tetradecene sulfonate, dioctyl sodium sulfosuccinate, disodium lauryl sulfosuccinate, coconut oil fatty acid ethyl ester sodium sulfonate, sodium lauryl sulfate , Lauryl sulfate triethanolamine, sodium cetyl sulfate, alkyl (11,13,1
5) Triethanolamine sulfate, alkyl (12,13) sodium sulfate, alkyl (12,13) triethanolamine sulfate, alkyl (12,14,16) ammonium sulfate, alkyl (12-13) diethanolamine sulfate, alkyl (12- 14) Triethanolamine sulfate, alkyl (12-15) triethanolamine sulfate, coconut oil alkyl magnesium sulfate / triethanolamine, ammonium lauryl sulfate, potassium lauryl sulfate, magnesium lauryl sulfate, monoethanolamine lauryl sulfate, diethanolamine lauryl sulfate,

  Sodium myristyl sulfate, sodium stearyl sulfate, sodium oleyl sulfate, oleyl sulfate triethanolamine, polyoxyethylene lauryl ether sodium sulfate, polyoxyethylene lauryl ether sulfate triethanolamine, polyoxyethylene (1) alkyl (11, 13, 15) Sodium ether sulfate, polyoxyethylene (1) alkyl (11, 13, 15) ether triethanolamine sulfate, polyoxyethylene (3) alkyl (11-15) sodium ether sulfate, polyoxyethylene (2) alkyl (12, 13) Sodium ether sulfate, polyoxyethylene (3) alkyl (12-14) sodium ether sulfate, polyoxyethylene (3) alkyl (12-15) sodium ether sulfate, poly Kishiechiren (2) lauryl ether sulfate, polyoxyethylene (3) myristyl ether sulfate, a higher fatty acid alkanolamide, sodium sulfate, lauryl phosphate, sodium lauryl phosphate,

Potassium cetyl phosphate, diethanolamine cetyl phosphate, polyoxyethylene oleyl ether phosphate, polyoxyethylene lauryl ether phosphate, sodium polyoxyethylene lauryl ether phosphate, polyoxyethylene cetyl ether phosphate, sodium polyoxyethylene cetyl ether phosphate, Polyoxyethylene stearyl ether phosphate, polyoxyethylene oleyl ether phosphate, polyoxyethylene oleyl ether sodium phosphate, polyoxyethylene alkylphenyl ether phosphate, polyoxyethylene alkylphenyl ether sodium phosphate, polyoxyethylene alkylphenyl ether Triethanolamine phosphate, polyoxyethylene octyl ether phosphate, polyoxyethylene (10) Rualkyl (12,13) ether phosphate, polyoxyethylene alkyl (12-15) ether phosphate, polyoxyethylene alkyl (12-16) ether phosphate, polyoxyethylene lauryl ether phosphate triethanolamine, polyoxyethylene Oleyl ether phosphate diethanolamine and the like.

  Cationic surfactants: for example, dioctylamine, dimethylstearylamine, trilaurylamine, diethylaminoethylamide stearate, lauryltrimethylammonium chloride, cetyltrimethylammonium chloride, cetyltrimethylammonium bromide, cetyltrimethylammonium saccharin, stearyltrimethyl chloride Ammonium, alkyl chloride (20-22) trimethyl ammonium, lauryl trimethyl ammonium bromide, alkyl (16,18) trimethyl ammonium chloride, stearyl trimethyl ammonium bromide, stearyl trimethyl ammonium saccharin, alkyl chloride (28) trimethyl ammonium chloride, di ( Polyoxyethylene) oleylmethylammonium (2EO), dipolyoxyethylene chloride Emissions stearyl methyl ammonium, polyoxyethylene (1) polyoxypropylene (25) diethyl methyl ammonium chloride, tri (polyoxyethylene) stearyl ammonium (5 EO), distearyl dimethyl ammonium chloride,

  Dialkyl (12-15) dimethylammonium chloride, dialkyl (12-18) dimethylammonium chloride, dialkyl (14-18) dimethylammonium chloride, dicocoyldimethylammonium chloride, dicetyldimethylammonium chloride, isostearyl lauryldimethylammonium chloride, chloride Benzalkonium chloride, myristyldimethylbenzylammonium chloride, lauryldimethyl (ethylbenzyl) ammonium chloride, stearyldimethylbenzylammonium chloride, laurylpyridinium chloride, cetylpyridinium chloride, lauroylcholaminoformylmethylpyridinium chloride, stearoylcoraminoformylmethylpyridinium chloride, odor Alkyl isoquinolium chloride, methylbenzethonium chloride, benzethonium chloride and the like.

  Amphoteric surfactants: for example 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, alkyldiaminoethylglycine hydrochloride, sodium lauryldiaminoethylglycine, undecylhydroxyethylimidazolium betaine sodium, undecyl-N -Carboxymethylimidazolium betaine, coconut oil fatty acid acyl-N-carboxyethyl-N-hydroxyethylethylenediamine disodium, coconut oil fatty acid acyl-N-carboxyethoxyethyl-N-carboxyethylethylenediamine disodium, coconut oil fatty acid acyl- N-carboxymethoxyethyl-N-carboxymethylethylenediamine disodium, sodium laurylaminopropionate, sodium laurylaminodipropionate Lithium, laurylaminopropionic acid triethanolamine, palm oil fatty acid acyl-N-carboxyethyl-N-hydroxyethylethylenediamine sodium, lauryldimethylaminoacetic acid betaine, coconut oil alkyldimethylaminoacetic acid betaine, stearyldimethylaminoacetic acid betaine, stearyldimethylbetaine Sodium, coconut oil fatty acid amidopropyl betaine, palm oil fatty acid amidopropyl betaine, lauric acid amidopropyl acetic acid betaine, ricinoleic acid amidopropyl betaine, stearyl dihydroxyethyl betaine, lauryl hydroxysulfobetaine and the like.

Nonionic surfactants: for example, polyoxyethylene (10) alkyl (12,13
) Ether, polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, polyoxyethylene (3, 7, 12) alkyl (12-14) ether, polyoxyethylene tridecyl Ether, polyoxyethylene myristyl ether, polyoxyethylene-sec-alkyl (14) ether, polyoxyethylene isocetyl ether, polyoxyethylene cetostearyl ether, polyoxyethylene (2,10,20) isostearyl ether, polyoxy Ethylene oleyl cetyl ether, polyoxyethylene (20) aralkyl ether, polyoxyethylene octyldodecyl ether, polyoxyethylene behenyl ether, polyoxy Octylphenyl ether,

  Polyoxyethylene nonyl phenyl ether, polyoxyethylene dinonyl phenyl ether, polyoxyethylene (1) polyoxypropylene (1, 2, 4, 8) cetyl ether, polyoxyethylene (5) polyoxypropylene (1, 2, 4,8) cetyl ether, polyoxyethylene (10) polyoxypropylene (1,2,4,8) cetyl ether, polyoxyethylene (20) polyoxypropylene (1,2,4,8) cetyl ether, poly Oxyethylene polyoxypropylene lauryl ether, polyoxyethylene (3) polyoxypropylene (34) stearyl ether, polyoxyethylene (4) polyoxypropylene (30) stearyl ether, polyoxyethylene (34) polyoxypropylene (23) Stearyl Ether, polyoxyethylene polyoxypropylene cetyl ether, polyoxyethylene polyoxypropylene decyl tetradecyl ether,

  Polyethylene glycol monolaurate, ethylene glycol monostearate, polyethylene glycol monostearate, polyethylene glycol monooleate, ethylene glycol fatty acid ester, self-emulsifying ethylene glycol monostearate, diethylene glycol laurate, polyethylene glycol myristate, polyethylene glycol palmitate , Diethylene glycol stearate, self-emulsifying polyethylene glycol monostearate (2), polyethylene glycol isostearate, ethylene glycol dioctanoate, diethylene glycol dilaurate, polyethylene glycol dilaurate, polyethylene glycol dipalmitate (150), ethylene glycol distearate, Distearic acid Ji glycol, polyethylene glycol distearate, dioleate, ethylene glycol, polyethylene glycol dioleate,

  Polyethylene glycol diricinoleate, polyoxyethylene (20) sorbitan monolaurate, polyoxyethylene (20) sorbitan monopalmitate, polyoxyethylene (6) sorbitan monostearate, polyoxyethylene (20) sorbitan monostearate, tri Stearic acid polyoxyethylene (20) sorbitan, monooleic acid polyoxyethylene (6) sorbitan, monooleic acid polyoxyethylene (20) sorbitan, trioleic acid polyoxyethylene (20) sorbitan, polyoxyethylene (20) palm Oil fatty acid sorbitan, polyoxyethylene (10-80) sorbitan monolaurate, polyoxyethylene sorbitan tristearate, polyoxyethylene (20) sorbitan isostearate Tristearate polyoxyethylene (150) sorbitan,

Polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene (10) hydrogenated castor oil, polyoxyethylene (20) hydrogenated castor oil, polyoxyethylene (40) hydrogenated castor oil, polyoxyethylene (50) hydrogenated Castor oil, polyoxyethylene (60) hydrogenated castor oil, lipophilic glyceryl monostearate, lipophilic glyceryl monooleate, glyceryl monostearate, palm oil fatty acid glyceryl, glyceryl laurate, glyceryl myristate, Glyceryl isostearate, glyceryl ricinoleate, glyceryl monohydroxystearate, glyceryl oleate, glyceryl linoleate, glyceryl erucate, glyceryl behenate, wheat germ oil fatty acid glyceride, safflower oil fatty acid glyceryl Hydrogenated soybean fatty acid glyceryl, saturated fatty acid glycerides,

  Cottonseed oil fatty acid glyceryl, monoisostearate monomyristate glyceryl, mono beef fatty acid glyceride, monolanolin fatty acid glyceryl, sesquioleate glyceryl, distearate glyceryl, diisostearate glyceryl, diarachiate glyceryl, lauritan monolaurate, sorbitan monopalmitate, monostearate Sorbitan acid, sorbitan monoisostearate, sorbitan monooleate, sorbitan sesquistearate, sorbitan sesquioleate, sorbitan tristearate, sorbitan trioleate, sorbitan palm oil fatty acid, sorbitan isostearate, sorbitan sesquiisostearate, sorbitan distearate , Diglyceryl isopalmitate, poly (4-10) glyceryl monolaurate , Monomyristate poly (10) glyceryl monostearate poly (2-10) glyceryl monoisostearate poly (2-10) glyceryl monooleate poly (2-10) glyceryl, diglyceryl sesquioleate,

  Poly (2-10) glyceryl diisostearate, poly (6-10) glyceryl distearate, diglyceryl triisostearate, poly (10) glyceryl tristearate, poly (10) glyceryl trioleate, poly (2) tetraisostearate ) Glyceryl, decaglyceryl pentastearate, poly (6-10) glyceryl pentaoleate, poly (10) glyceryl heptearate, decaglyceryl decastearate, poly (10) glyceryl dekaoleate, poly (6) condensed ricinoleate Glyceryl, sucrose fatty acid ester, coconut oil fatty acid sucrose ester, alkyl glucoside, coconut oil alkyl dimethylamine oxide, lauryl dimethylamine oxide, dihydroxyethyl lauryl dimethylamine oxide, sugar Allyl dimethyl amine oxide, oleyl dimethyl amine oxide, polyoxyethylene coconut oil alkyldimethylamine oxide, and the like.

  Natural surfactant: For example, saponin, lecithin, soybean phospholipid, hydrogenated soybean phospholipid, soybean lysophospholipid, hydrogenated soybean lysophospholipid, egg yolk lecithin, hydrogenated egg yolk lysophosphatidylcholine, phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, Sphingophospholipid, sphingomyelin, ganglioside, bile acid, cholic acid, deoxycholic acid, sodium cholate, sodium deoxycholate, spicrispolic acid, rhamnolipid, trehalose lipid, sophorolipid, mannosyl erythritol lipid, etc.

  UV absorbers: Paraaminobenzoic acid derivatives such as paraaminobenzoic acid, ethyl paraaminobenzoate, glyceryl paraaminobenzoate, amyl paradimethylaminobenzoate, 2-ethylhexyl paradimethylaminobenzoate, benzyl cinnamate, diparamethoxy Glyceryl mono-2-ethylhexanoate, methyl 2,4-diisopropylcinnamate, ethyl 2,4-diisopropylcinnamate, potassium paramethoxycinnamate, sodium paramethoxycinnamate, paramethoxycinnamate Cinnamate derivatives such as isopropyl acid, 2-methoxyhexyl paramethoxycinnamate, 2-ethoxyethyl paramethoxycinnamate, ethyl paraethoxycinnamate, urocanic acid derivatives such as urocanic acid, ethyl urocanate,

2,4-dihydroxybenzophenone, 2,2 ′, 4,4′-tetrahydroxybenzophenone, sodium 2-hydroxy-4-methoxy-5-sulfobenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid, 2 -Hydroxy-4-methoxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, benzophenone derivatives such as sodium 2,2'-dihydroxy-4,4'-dimethoxy-5-sulfobenzophenone, ethylene glycol salicylate Salicylic acid derivatives such as 2-ethylhexyl salicylate, phenyl salicylate, benzyl salicylate, p-tert-butylphenyl salicylate, homomenthyl salicylate, salicylic acid-3,3,5-trimethylcyclohexyl, 2- (2′-hydride) Roxy-5′-methoxyphenyl) benzotriazole, 4-tert-butyl-4′-methoxybenzoylmethane and the like.

  Powders and coloring materials: for example, kaolin, silicic anhydride, magnesium aluminum silicate, sericite, talc, boron nitride, mica, montmorillonite, hemp cellulose powder, wheat starch, silk powder, corn starch, nitro pigment, Azo dyes, nitroso dyes, triphenylmethane dyes, xanthene dyes, quinoline dyes, anthraquinone dyes, indigo dyes, pyrene dyes, phthalocyanine dyes,

  Natural pigments such as flavonoid, quinone, porphyrin, water-soluble anato, squid powder, caramel, guaiazulene, gardenia blue, gardenia yellow, cochineal, shikonin, copper chlorophyllin sodium, paprika pigment, safflower red, safflower yellow, lacainate, riboflavin butyrate , Carbon black, yellow iron oxide, black iron oxide, bengara, conger, ultramarine, zinc oxide, chromium oxide, titanium oxide, black titanium oxide, zirconium oxide, chromium hydroxide, alumina, magnesium oxide, barium sulfate, aluminum hydroxide, Calcium carbonate, lithium cobalt titanate, manganese violet, pearl pigment, etc.

  Plant extract: for example, Ashitaba extract, Asenyaku extract, Avocado extract, Achacha extract, Achachazul extract, Altea extract, Arnica extract, Oil-soluble Arnica extract, Almond extract, Aloe extract, Ansokkou extract, Ginkgo biloba extract, Nettle extract, Iris Root Extract, Fennel Extract, Turmeric Extract, Ages Extract, Echinacea Leaf Extract, Ogon Extract, Oat Extract, Auren Extract, Barley Extract, Okra Extract, Hypericum Extract, Oil-soluble Hypericum Extract, Otriculium Extract, Oil-soluble Otriculi Extract, Onion Extract, Dutch mustard extract, orange flower water, oyster tannins, cuckoo extract, valerian extract, cattail extract, chamomile extract, oil-soluble chamomile extract, chamomile water, Rasumugiekisu, Carrot extract, oil-soluble mosquito lot extract, carrot oil, Kawarayomogiekisu extract, licorice extract, licorice extract powder, licorice flavonoids, cantharides tincture, raspberry extract, kiwi extract, cinchona,

  Cucumber extract, Kyonin extract, Quince seed extract, Gardenia extract, Kumazasa extract, Clara extract, Walnut shell extract, Clematis extract, Brown sugar extract, Chlorella extract, Mulberry extract, Keihi extract, Gentianana extract, Gentian shoko extract, Tea extract, Kohone extract, Burdock extract, oil-soluble burdock extract, wheat germ extract, hydrolyzed wheat powder, rice bran extract, rice bran ferment extract, comfrey extract, saffron extract, saffron extract, oil-soluble salvia extract, hawthorn extract, salamander extract, shiitake mushroom Extract, Shiitake extract powder, Giant extract, Shikon extract, Oil-soluble Shikon extract, Perilla extract, Linden extract, Oil-soluble Linden extract, Shimotake extract, Peonies extract Job's tears extract, ginger extract, oil-soluble ginger extract, ginger tincture, calamus root extract, white birch extract, oil-soluble birch extract, birch sap, honeysuckle extract, horsetail extract, oil-soluble horsetail extract,

Scordinin, Stevia extract, Horseshoe extract, Hawthorn extract, Elderberry extract, Horseshoe extract, Achillea millefolium extract, Oil-soluble Achillea millefolium extract, Pepper extract, Sage extract, Oil-soluble sage extract, Sage water, Zenia mushroom extract, Celery extract , Senkyu extract, senkyu water, senbu extract, soybean extract, taisu extract, thyme extract, tea extract, tea extract, tea fruit extract, clove extract, chimpi extract, camellia extract, camellia extract, oil soluble teigurumi extract, duke extract, terminaria extract , Toki extract, Oil-soluble Toki extract, Toki water, Toki-Senka extract, Oil-soluble Toki-Senka extract, Soymilk powder, Tonin extract, Spruce extract Damiekisu, tomato extract, Torr Men Chira extract, natto extract, ginseng extract, oil-soluble carrot extract, garlic extract, Nobaraekisu,

  Oil-soluble wild rose extract, Bakuga extract, Bakuga root extract, Bakumondo extract, Parsley extract, Hadakamugi leaf juice concentrate, Distilled peppermint water, Hamelis water, Hamelis extract, Rose extract, Parietalia extract, Hikikoshi extract, Biwa leaf extract, Oil soluble Loquat leaf extract, dandelion extract, butterfly extract, butcher bloom extract, butcher bloom extract powder, grape extract, grape leaf extract, grape water, hayflower extract, loofah extract, loofah water, safflower extract, oil soluble bodai extract, bodaiju water, Button extract, hop extract, oil-soluble hop extract, pine extract, maria thistle extract, maronnier extract, oil-soluble maroonnier extract, mukuroji extract, melissa extract, merirot extract, peach leaf extract, oil-soluble peach leaf extract Palm extract, cornflower extract, cornflower water, eucalyptus extract, yukinoshita extract, lily extract, lacquer extract, oil-soluble lacquer extract, mugwort extract, mugwort water, lavender extract, lavender water, apple extract, litchi extract, lettuce extract, lotus extract, rose Water, rosemary extract, oil-soluble rosemary extract, Roman chamomile extract, bitumen extract, etc.

  Amino acids and peptides: glycine, valine, leucine, isoleucine, serine, threonine, phenylalanine, tyrosine, tryptophan, cystine, cysteine, methionine, hydroxyproline, aspartic acid, asparagine, glutamic acid, glutamine, histidine, γ-aminobutyric acid DL-pyrrolidonecarboxylic acid, ε-aminocaproic acid, hydrolyzed elastin, water-soluble elastin, hydrolyzed collagen, water-soluble collagen, casein, glutathione, wheat peptide, soybean peptide and the like.

  Vitamins and vitamin-like agents: for example, vitamin A such as retinol, retinal, retinoic acid, retinol acetate, retinol palmitate, α-carotene, β-carotene, γ-carotene, δ-carotene, lycopene, zeaxanthin, Carotenoids such as cryptoxanthine, echinenone and astaxanthin; vitamin B1 such as thiamine; vitamin B2 such as riboflavin; vitamin B6 such as pyridoxine, pyridoxal and pyridoxamine; vitamin B12 such as cyanocobalamin;

  Folic acid, nicotinic acid, nicotinic acid amide, pantothenic acid, biotins, L-ascorbic acid, sodium L-ascorbate, L-ascorbyl stearate, L-ascorbyl palmitate, L-ascorbyl dipalmitate, tetraisopalmitic acid Vitamin C such as L-ascorbyl, L-ascorbic acid sulfate disodium, L-ascorbyl magnesium, L-ascorbyl sodium phosphate, ascorbic acid-2-phosphate, L-ascorbic acid-2-glucoside, ergocalci Vitamin Ds such as ferrol and cholecalciferol, d-α-tocopherol, DL-α-tocopherol, dl-α-tocopherol acetate, dl-α-tocopherol succinate, β-tocopherol, γ-tocopherol, d-δ- G Vitamin E such as Ferrol, ubiquinones, vitamin K, carnitine, ferulic acid, .gamma.-oryzanol, alpha-lipoic acid and orotic acid.

  Preservatives: for example, benzoic acid, sodium benzoate, undecylenic acid, salicylic acid, sorbic acid, potassium sorbate, dehydroacetic acid, sodium dehydroacetate, isobutyl paraoxybenzoate, isopropyl paraoxybenzoate, ethyl paraoxybenzoate, butyl paraoxybenzoate Propyl paraoxybenzoate, benzyl paraoxybenzoate, methyl paraoxybenzoate, methyl sodium paraoxybenzoate, phenoxyethanol, Photosensitive Element 101, Photosensitive Element 201, Photosensitive Element 401, and the like.

  Antioxidants: For example, butylhydroxyanisole, butylhydroxytoluene, propyl gallate, erythorbic acid, sodium erythorbate, parahydroxyanisole, octyl gallate and the like.

  Blocking agent: For example, ethylenediaminehydroxyethyl triacetate trisodium, edetic acid, edetate disodium, edetate trisodium, edetate tetrasodium, sodium citrate, gluconic acid, phytic acid, sodium polyphosphate, sodium metaphosphate, etc. Metal ionic compounds, etc.

  Moisturizer: for example, hyaluronic acid, sodium hyaluronate, sodium chondroitin sulfate, sodium lactate, sodium pyrrolidonecarboxylate, betaine, lactic acid bacteria culture solution, yeast extract, ceramide and the like.

  Anti-inflammatory agents: for example, glycyrrhizic acid, trisodium glycyrrhizinate, dipotassium glycyrrhizinate, monoammonium glycyrrhizinate, β-glycyrrhetinic acid, glyceryl retinoic acid, stearyl glycyrrhetinate, lysozyme chloride, hydrocortisone, allantoin and the like.

pH adjuster: For example, sodium hydroxide, potassium hydroxide, triethanolamine and the like.
Salts: For example, sodium chloride, potassium chloride, magnesium chloride, sodium sulfate and the like.

α-hydroxy acids: for example, citric acid, glycolic acid, tartaric acid, lactic acid and the like.
Whitening agents: for example, arbutin, α-arbutin, placenta extract and the like.
Essential oils: for example, angelica oil, ylang ylang oil, elemi oil, chamomile oil, roman chamomile oil, cardamom oil, calamus oil, galvanum oil, camphor oil, carrot seed oil, clary sage oil, clove oil, caihi oil, coriander oil, Cypress oil, sandalwood oil, cedarwood oil, citronella oil, cinnamon leaf oil, jasmine absolute, juniper berry oil, ginger extract, spearmint oil, sage oil, cedar oil, geranium oil, thyme oil, tea tree oil, nutmeg oil, Near-uri oil, neroli oil, pine oil, basil oil, peppermint oil, patchouli oil, palmarosa oil, fennel oil, petitgren oil, black pepper oil, frankincense oil, vetiver oil, peppermint oil, bergamot oil, benzoin oil, bo Dorozu oil, marjoram oil, myrrh oil, melissa oil, eucalyptus oil, Rabensara oil, lavandin oil, lavender oil, lindane oil, rose oil, rosewood oil, rosemary oil, lovage oil, and the like.

Terpenes: For example, pinene, terpinene, terpinolene, myrcene, longiferene and the like.
Furthermore, it is a component such as a perfume and water.

The external preparation for skin and cosmetics of the present invention may be in any dosage form and form as long as they are used in contact with the skin at the time of use, and are brought into contact with the skin near the site where subcutaneous fat metabolism is desired. Are more preferable. Specific examples of the external preparation for skin and cosmetics include skin milk, skin cream, foundation cream, massage cream, cleansing cream, shaving cream, cleansing foam, skin lotion, lotion, pack, lipstick, blusher, eye Shadow, nail polish, soap, body shampoo, hand soap, shampoo, rinse, hair tonic, treatment, hair cream, hair spray, hair restorer, hair nourishing agent, hair dye, hair conditioner, hair remover, anti-dandruff agent, toothpaste, denture adhesion It includes forms such as gargles, gargles, permanent wave agents, curling agents, styling agents, ointments, poultices, tape agents, bathing agents, antiperspirants, sunscreen agents, etc. It doesn't matter what type it is Regardless of the gender and age of the user. Furthermore, in addition to humans, those that come into contact with animal skin are also included.

Further, the external preparation for skin and cosmetics of the present invention may be in any dosage form, such as solid, liquid, semi-solid, gas, powder, granule, tablet, gel, foam, etc. Examples include dosage forms.
In addition, although not particularly limited, from the point of improving the problems of the conventional carnitine derivatives and salts thereof, such as poor stability in an aqueous formulation, to more effectively demonstrate the effects of the present invention, Among the prepared dosage forms and forms, a dosage form and form containing an aqueous medium may be selected. In this case, the amount of water contained in the external preparation for skin and cosmetics of the present invention is usually in the range of 0.01 to 99.99% by mass in the total amount of external preparation for skin or cosmetics.

  In addition to the components described above, existing cosmetic raw materials can be further used in the cosmetic of the present invention. For example, Cosmetic Material Standards Second Edition Annotation, Japan Standards Association, 1984 (Pharmaceutical Daily Report), Cosmetic Raw Material Standards Non-Standard Components, Ministry of Health and Welfare Pharmaceutical Affairs Bureau Examination Division Supervision, 1993 (Pharmaceutical Daily Reports) Standards supplement, supervised by the Ministry of Health and Welfare Pharmacy Examination Division, 1993 (Pharmaceutical Daily), permission standards by cosmetic type, supervision by the Ministry of Health and Welfare Pharmacy Examination Division, 1993 (Pharmaceutical Daily), formulation standard by cosmetic variety, Ministry of Health and Welfare Pharmacy Examination Division Supervision, 1997 (Pharmaceutical Daily), Cosmetic Raw Material Dictionary, 1991 (Nikko Chemicals) and new cosmetic functional materials 300, 2002 (CMC Publishing) etc. all cosmetic raw materials are impaired the effect of the present invention Can be used within the range.

  The external preparation for skin and cosmetics of the present invention can be produced by using the above-described components so as to have a predetermined content, and dissolving, mixing, or dispersing in accordance with a conventional method according to the mode.

  EXAMPLES Hereinafter, although this invention is demonstrated further more concretely based on an Example, this invention is not limited to these Examples. In the following examples, “%” is based on mass unless otherwise specified.

[Synthesis Example 1]
Synthesis of L -carnitine hydrochloride of 2-hexyldecanoic acid 45.6 g (0.283 mol) of L-carnitine was dissolved in 150 mL of trifluoroacetic acid in an ice bath, and 116.6 g (0.425 mol) of 2-hexyldecanoic acid chloride was added to it over 10 minutes. And dripped. The mixture was heated and stirred at 80 ° C. for 4 hours, and then the solvent was distilled off under reduced pressure. 264.6g of dark brown oil obtained
Was washed three times with 200 mL of n-hexane, and 200 mL of a black oily substance was collected. 3.0 g of this oily substance was taken and extracted with 20 mL of ethanol, 30 mL of n-butanol and 60 mL of water, and the obtained organic layer was washed with 60 mL of water, and further washed with a mixed solution of 20 mL of ethanol and 60 mL of water. The obtained organic layer was further washed with 60 mL of water. The organic layer was collected and dried, and the solvent was distilled off to obtain 2.0 g of 2-hexyldecanoic acid L-carnitine hydrochloride.

The structure of this target substance is as follows: NMR, liquid chromatograph mass spectrometry (LC / MS
) And elemental analysis.
<NMR>
¹ H-NMR (CDCl ₃ ); 0.90 ppm (6H, t, 7.0 Hz), 1.29-1.62 ppm (24H, m), 2.41 ppm (1H, m), 2.76 ppm (2H, d, 6.0 Hz), 3.21 ppm (9H, s), 3.75 ppm (1H, d, 14.6Hz), 3.92 ppm (1H, dd, 8.2, 14.6Hz), 5.60-5.64 ppm (1H, m)
NMR system: Burker Advance 500
Sample concentration: 40 mg sample / 422 mg deuterated chloroform Temperature: room temperature <Liquid chromatograph-mass spectrometry (LC / MS)>
MS (ESI) m / z: 400.5 [M ⁺ ] (by LC / MS)
Liquid chromatographic (LC) instrument: Agilent 1100 series, column: Shodex silica C8-5B, column temperature: 40 ° C, eluent: 20 mM aqueous ammonium acetate / acetonitrile = 30/70, flow rate: 1.0 mL / min, sample concentration・ Injection volume: 10μL × 5mg / mL Eluent, detection: Photodiode array UV200-700nm,
Mass spectrometry (MS) instrument: Thermoquest LCQ Advantage, ionization method: ESI (electrospray ionization) method, scan range: m / Z 50-1000 (positive and negative alternating), MS / MS collision energy: 40%
<Elemental analysis>
Elemental analysis: C 62.8%, H 10.6%, N 3.5%, O 14.9%, Cl 8.2%
(C, H, N, O: Organic element analyzer CHNS-932 + Option VTF-900 for oxygen analysis (LECO)
by. Reference: sym-diphenylthiourea (CHN analysis), p-nitroaniline (O analysis)) (Cl: by ion chromatography. 1 mg of sample is accurately weighed and eluent (1.8 mM)
Na ₂ CO ₃ + 1.7 mM NaHCO ₃ ), 100 mL, measured by anion chromatography (DIONEX DX-500), converted to Cl content in sample. Column Shodex SI-90 4E, flow rate 1.0mL / min, injection volume 25μL, detector: conductivity detector, suppressor: ASRS-I)

[Synthesis Example 2]
Synthesis of L -carnitine hydrochloride of 2-methylpalmitic acid 45.6 g (0.283 mol) of L-carnitine was dissolved in 150 mL of trifluoroacetic acid in an ice bath, and 122.4 g (0.425 mol) of 2-methylpalmitic acid chloride was added thereto. It was added dropwise over a period of minutes. The mixture was heated and stirred at 80 ° C. for 4 hours, and then the solvent was distilled off under reduced pressure. The obtained dark brown oily substance 278.0g
Was washed three times with 200 mL of n-hexane, and 200 mL of a black oily substance was collected. 3.0 g of this oily substance was taken and extracted with 20 mL of ethanol, 30 mL of n-butanol and 60 mL of water, and the obtained organic layer was washed with 60 mL of water, and further washed with a mixed solution of 20 mL of ethanol and 60 mL of water. The obtained organic layer was further washed with 60 mL of water. The organic layer was collected, dried and evaporated to give 2.2 g of 2-methylpalmitic acid L-carnitine hydrochloride.

The structure of this target substance was confirmed by NMR, liquid chromatograph mass spectrometry (LC / MS), and elemental analysis as described below in the same manner as in Synthesis Example 1.
<NMR>
¹ H-NMR (CDCl ₃ ); 2.50 ppm (1H, m), 2.75 ppm (1H, dd, 6.2, 1.5 Hz), 2.80 ppm (1H, m), 3.73 ppm (1H, d, 14.4 Hz), 3.91 ppm (1H, dd, 14.4, 8.5Hz), 5.61-5.65 ppm (1H, m)
<Liquid chromatograph-mass spectrometry (LC / MS)>
MS (ESI) m / z: 414.5 [M ⁺ ]
<Elemental analysis>
C 64.3%, H 10.3%, N 3.2%, O 14.2%, Cl 8.0%

[Synthesis Example 3]
Synthesis of 2-butyloctanoic acid L-carnitine hydrochloride 45.6 g (0.283 mol) of L-carnitine was dissolved in 150 mL of trifluoroacetic acid in an ice bath, and 92.7 g (0.425 mol) of 2-butyloctanoic acid chloride was added thereto for 10 minutes. It was dripped over. The mixture was heated and stirred at 80 ° C. for 4 hours, and then the solvent was distilled off under reduced pressure. 25-0.0 g of the obtained dark brown oily substance was n-
The resultant was washed with 200 mL of hexane three times, and 200 mL of a black oily substance was collected. 3.0 g of this oily substance was taken and extracted with 20 mL of ethanol, 30 mL of n-butanol and 60 mL of water, and the obtained organic layer was washed with 60 mL of water, and further washed with a mixed solution of 20 mL of ethanol and 60 mL of water. The obtained organic layer was further washed with 60 mL of water. The organic layer was collected, dried and evaporated to obtain 1.6 g of 2-butyloctanoic acid L-carnitine hydrochloride.

The structure of this target substance was confirmed by NMR, liquid chromatograph mass spectrometry (LC / MS), and elemental analysis as described below in the same manner as in Synthesis Example 1.
<NMR>
¹ H-NMR (CDCl ₃ ); 2.76 ppm (1H, d, 6.0Hz), 2.80 ppm (1H, m), 3.76 ppm (1H, d, 14.4Hz), 3.94 ppm (1H, dd, 14.4, 8.2Hz ), 5.60-5.64 ppm (1H, m)
<Liquid chromatograph-mass spectrometry (LC / MS)>
MS (ESI) m / z: 344.5 [M ⁺ ]
<Elemental analysis>
C 60.1%, H 9.5%, N 3.5%, O 16.7%, Cl 10.2%

[Example 1]
(Dermal absorption)
As a test substance,
1) L-carnitine hydrochloride (obtained from Sigma-Aldrich)
2) Palmitic acid L-carnitine hydrochloride (obtained from Sigma-Aldrich)
3) 2-Hexyldecanoic acid L-carnitine hydrochloride (Synthesis Example 1)
4) 2-Methyl palmitic acid L-carnitine hydrochloride (Synthesis Example 2)
5) 2-Butyloctanoic acid L-carnitine hydrochloride (Synthesis Example 3)
(The above test substances (1) and (2) were used for comparison).

Each of the above test substances was dissolved in Dulbecco's PBS (-) containing 5% by mass of 1,2-hexanediol, and further 1N NaOH was added to adjust the pH to 7 to obtain 0.3% by mass of each test substance solution. Each test substance solution thus obtained was added to a human skin tissue three-dimensional model (TESTSKIN). LSD-d, Toyobo Co., Ltd.) 2mL separated by two chambers, 3mL Dulbecco PBS (-) was added to the dermis side chamber, and each chamber was stirred with a magnetic stirrer. The temperature was maintained at 35 ° C for 24 hours.

After holding for 24 hours, 1 mL of the buffer solution in the dermal side chamber was collected. 0.5 mL of that was used as it is for the determination of free carnitine. The residue is adjusted to pH = 11 with 1N NaOH, sealed in a 1.5 mL screw vial, left at 80 ° C. for 6 hours, allowed to cool, and adjusted to pH 7 with 1N HCl to exist as an acyl derivative. Carnitine was completely degraded to free carnitine. In these solutions, 0.02 mL of 1N hydrochloric acid, 0.1 mL of 1.6 mass% 1-aminoanthracene / acetone solution, 0.1 mL of 16 mass% EDC (1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride) After adding an aqueous solution and stirring well and allowing to stand at room temperature for 20 minutes, the solution was washed with 3 mL of diethyl ether, the aqueous layer was filtered, and then subjected to reverse phase high performance liquid chromatography (reverse phase HPLC). 1-aminoanthracene modified carnitine (excitation wavelength: 248 nm, obtained by HPLC (column: Phenomenex Synergi-RP, eluent: 45% acetonitrile, flow rate: 1.0 mL / min)
From the peak intensity of the fluorescence wavelength (418 nm), the value of the sample subjected to alkaline heat treatment is the total amount of free carnitine and carnitine derivatives, and the value of the untreated sample is the amount of free carnitine. The test substance-derived carnitine derivative and free carnitine concentration were calculated and quantified.

The result is shown in FIG.
From FIG. 1, L-carnitine 2-hexyldecanoate, L-carnitine 2-methylpalmitate and L-carnitine 2-butyloctanoate reach subcutaneously at a concentration equal to or higher than L-carnitine palmitate. -It can be seen that the carnitine concentration is increased.

[Example 2]
(Stability)
As a test substance,
1) Acetyl L-carnitine hydrochloride (obtained from Sigma-Aldrich)
2) Palmitic acid L-carnitine hydrochloride (obtained from Sigma-Aldrich)
3) 2-Hexyldecanoic acid L-carnitine hydrochloride (Synthesis Example 1)
4) 2-Methyl palmitic acid L-carnitine hydrochloride (Synthesis Example 2)
5) 2-Butyloctanoic acid L-carnitine hydrochloride (Synthesis Example 3)
(The above test substances (1) and (2) were used for comparison).

Each of the above test substances was dissolved in Dulbecco's PBS (-) containing 5% by mass of 1,2-hexanediol, and further 1N NaOH was added to adjust the pH to 7 to obtain 0.3% by mass of each test substance solution. The resulting solution was sealed in a glass vial and kept at 80 ° C. in a water bath.

The solution is collected after each specified time, and subjected to reverse phase HPLC (column: Shodex C8-5B, eluent: 70% acetonitrile, flow rate 1.0 mL / min), and from the UV absorption intensity at 210 nm of the obtained peak, derived from the test substance The remaining carnitine derivative concentration was measured. The residual ratio of the carnitine derivative derived from the test substance at each predetermined time is shown in FIG.

  From FIG. 2, L-carnitine 2-hexyldecanoate, L-carnitine 2-methylpalmitate and L-carnitine 2-butyloctanoate, which are carnitine derivatives having an α-branched acyl group, are other linear acyl groups. It can be seen that the residual ratio is high and the stability in an aqueous solution is significantly higher than that of acylcarnitine having a water content.

[Example 3]
(Lipolysis promotion effect)
Human preadipocytes (manufactured by Toyobo) were seeded in a 96-well microplate, and cultured at 37 ° C. in a 5% CO ₂ atmosphere with human preadipocyte growth medium TAGM (manufactured by Toyobo) while changing the medium every two days. Subsequently, the medium was replaced with human adipocyte differentiation medium TADM (manufactured by Toyobo) and cultured for 5 days. Subsequently, the medium was replaced with an evaluation medium having the composition shown in Table 1 below (a medium to which no test substance was added or a medium to which any one of the following test substances was added 50 μM), and the culture was further continued for 5 days.

1) L-carnitine hydrochloride (obtained from Sigma-Aldrich)
2) Palmitic acid L-carnitine hydrochloride (obtained from Sigma-Aldrich)
3) 2-Hexyldecanoic acid L-carnitine hydrochloride (Synthesis Example 1)
4) 2-Methyl palmitic acid L-carnitine hydrochloride (Synthesis Example 2)
5) 2-Butyloctanoic acid L-carnitine hydrochloride (Synthesis Example 3)
(The above test substances (1) and (2) were used for comparison).

After culturing, the cells were washed 3 times with Dulbecco's PBS (-), fixed with formalin, stained with an oil red / water-isopropanol (1/1) solution, extracted with isopropanol, and introduced into the cells by a colorimetric method. The amount of accumulated triglyceride was quantified. The amount of triglyceride accumulated in each test substance is shown in Table 2 as relative comparison values when the non-added section is taken as 100.

  From Table 2, it can be seen that 2-hexyldecanoic acid L-carnitine, 2-methylpalmitic acid L-carnitine and 2-butyloctanoic acid L-carnitine have good fat metabolism promoting effects as acylcarnitines.

[Example 4]
Cosmetics containing 2-hexyldecanoic acid L-carnitine hydrochloride having the composition shown in Table 3 below were prepared. When stored at 40 ° C. for 3 months, no separation or precipitation was observed and the film was stable.

[Example 5]
Preparation of lotion Toner lotion was prepared according to the following formulation examples 1 to 4. In the prescription examples 1 to 4, the total of the A component and the B component was 100%.

(Prescription Example 1)
A.
Dipotassium glycyrrhizinate 0.2%
2-Hexyldecanoic acid L-carnitine hydrochloride 1.0%
Citric acid 0.1%
Sodium citrate 0.3%
Purified water residue B.
Polyoxyethylene sorbitol tetraoleate 0.9%
Sorbitan monooleate 0.1%
Olive oil 0.1%
Dipropylene glycol 5.0%
Methylparaben 0.1%
Ethanol 10.0%

(Prescription example 2)
A.
Sodium citrate 0.1%
Glycerin 8.0%
Sodium pyrrolidonecarboxylate 1.0%
Trehalose 0.03%
1,3-butylene glycol 5.0%
Purified water residue B.
Polyoxyethylene polyoxypropylene decyl tetradecyl ether 0.6%
Methylparaben 0.1%
Ethanol 10.0%
2-Hexyldecanoic acid L-carnitine hydrochloride 0.3%

(Prescription Example 3)
A.
Polyvinyl alcohol 0.1%
Carboxyvinyl polymer 0.2%
Glycerin 3.0%
Edetate trisodium 0.1%
Sodium hydroxide 0.05%
2-Amino-2-methyl-1-propanol 0.06%
Caffeine 0.1%
Purified water residue B.
Ethanol 20.0%
Polyoxyethylene oleyl ether 0.3%
Methylparaben 0.1%
Menthol 0.1%
2-Methyl palmitic acid L-carnitine hydrochloride 0.1%
In each of Formulation Examples 1, 2, and 3, the components A and B were previously mixed and dissolved by heating at 50 ° C. Next, while stirring A, B was added to A gradually and solubilized. This was cooled with stirring, the stirring was stopped at 30 ° C., and left to stand to obtain each lotion.

(Prescription Example 4)
A.
1,3-butylene glycol 5.02%
Lauroyl glutamate di (cholesteryl / behenyl / octyldodecyl) 0.5%
Trehalose 0.03%
Trioctanoin 0.03%
PEG-58 hydrogenated castor oil 1.5% isostearic acid
PEG-60 hydrogenated castor oil 0.5%
Methylparaben 0.2%
Propylparaben 0.01%
Tocopherol 0.05%
2-Butyloctanoic acid L-carnitine hydrochloride 0.3%
B.
Sodium malate 0.1%
Appropriate amount of malic acid, purified water, residue A and B were mixed together and dissolved by heating at 60 ° C. Next, while stirring A, B was mixed with A and cooled to obtain a uniform lotion.

[Example 6]
Preparation of emulsion An emulsion was prepared according to the following formulation examples 5-7. In the prescription examples 5 to 6, the total of the A component and the B component was 100%, and in the prescription example 7, the total of the A to C components was 100%.

(Prescription Example 5)
A.
Squalane 10.0%
Polyoxyethylene glyceryl isostearate 3.5%
Polyoxyethylene hydrogenated castor oil triisostearate 6.5%
Pyroglutamic acid isostearate polyoxyethylene hydrogenated castor oil 12.0%
Methylparaben 0.1%
B.
2-Hexyldecanoic acid L-carnitine hydrochloride 0.5%
Purified water residue A and B were mixed together, and A was dissolved at 70 ° C and B was heated at 50 ° C. Next, while stirring A, B was added to A little by little to emulsify. The resulting emulsion was cooled with stirring, and the resulting emulsion was diluted 10-fold with purified water to obtain an emulsion.

(Prescription Example 6)
A.
Liquid paraffin 10.6%
Isopropyl myristate 0.6%
Oleyl alcohol 1.2%
Polyoxyethylene stearyl ether 3.4%
PEG distearate 1.9%
Polyoxyethylene polyoxypropylene tetradecyl ether 0.4%
2-Hexyldecanoic acid L-carnitine hydrochloride 0.3%
B.
Sodium stearoyl glutamate 0.1%
Propylene glycol 1.4%
Methylparaben 0.1%
PEG-400 0.2%
Purified water residue Each component of A and B was mixed in advance, and A was dissolved by heating at 70 ° C and B at 75 ° C. Next, while stirring B, A was added to B gradually and emulsified. This was cooled with stirring to obtain an emulsion.

(Prescription Example 7)
A.
Polyoxyethylene sorbitan monostearate 1.0%
Tetraoleic acid polyoxyethylene sorbitol 0.5%
Sorbitan monostearate 1.0%
Stearic acid 0.5%
Behenyl alcohol 0.5%
Beeswax 0.5%
Squalane 10.0%
Glyceryl tri-2-ethylhexanoate 10.0%
Decaglyceryl dekaoleate 3.0%
1,3-butylene glycol 7.0%
Methylparaben 0.1%
2-Methyl palmitic acid L-carnitine hydrochloride 0.3%
B.
Xanthan gum 0.04%
Carboxy vinyl polymer 0.08%
Purified water residue C.I.
Triethanolamine 0.05%
Purified water 4.95%
Each component of A, B, and C was mixed, A and B were heated and dissolved at 80 ° C., and C was homogenized at room temperature. Thereafter, while A was stirred, B was added to A to emulsify, and then C was added and cooled with stirring. As a result, an emulsion was formed at around 40 ° C. The emulsion composition was cooled to room temperature to obtain an emulsion.

[Example 7]
Preparation of Gel A lotion was prepared according to the following Formulation Examples 8-13. In Formulation Example 8, the sum of the A component and the B component is 100%, in Formulation Example 9, the sum of the A to E components, and in Formulation Examples 10 to 13, the sum of the A to C components is 100%. It was.

(Prescription Example 8)
A.
Agar 2.0%
Xanthan gum 0.2%
Caffeine 0.1%
Purified water 50.0%
B.
Glycerin 7.0%
PEG-1500 8.0%
Methylparaben 0.1%
2-Hexyldecanoic acid L-carnitine hydrochloride 0.8%
Purified water residue A and B were each mixed, and A was heated and dispersed at 90 ° C. and B at 50 ° C. Next, A was cooled to 50 ° C. while stirring and B was added to A, and the mixture was further cooled to 30 ° C. or less with stirring to be gelled. When sufficiently hardened, the gel was broken using a disper to form a microgel, and then degassed to obtain a uniform gel (translucent gel).

(Prescription Example 9)
A.
Carboxy vinyl polymer 0.35%
Purified water 50.0%
B.
Sodium hydroxide 0.1%
Purified water 10.0%
C.
Sodium hyaluronate 1% aqueous solution 6.0%
Purified water residue D.
Polyoxyethylene polyoxypropylene tetradecyl ether 0.3%
Ethanol 5.0%
Methylparaben 0.1%
2-Hexyldecanoic acid L-carnitine hydrochloride 0.3%
E.
Perfluoropolyether 0.2%

  Each component of A, B, C, and D was mixed, A and B were dissolved at room temperature, C was dissolved at 50 ° C, and D was heated and dissolved at 40 ° C. Next, while A was stirred, B was added to A to form a gel, and C, D, and E were further added and mixed with stirring. Then, it deaerated and obtained the uniform gel (translucent gel).

(Prescription Example 10)
A.
Carboxyvinyl polymer 0.5%
Purified water 40.0%
B.
Potassium hydroxide 0.1%
Purified water 10.0%
C.
Dipropylene glycol 10.0%
Methylparaben 0.1%
Dipotassium glycyrrhizinate 0.05%
Hydrolyzed collagen 0.05%
2-Methyl palmitic acid L-carnitine hydrochloride 0.5%
Purified water residue

  Each compounding component of A, B, and C was mixed, A and B were dissolved at room temperature, and C was heated and dissolved at 50 ° C. Next, while stirring A, B was added to A to form a gel, and C was further added and mixed while stirring. Then, it deaerated and obtained the uniform gel (translucent gel).

(Prescription Example 11)
A.
Glycerin 10.0%
1,3-butylene glycol 6.0%
Dimethicone 2.0%
PEG-60 hydrogenated castor oil 0.6%
Laureth-2 0.1%
Laureth-21 0.1%
Methylparaben 0.26%
Propylparaben 0.1%
Ethylparaben 0.1%
Phenoxyethanol 0.1%
Tocopherol acetate 0.1%
Chitosan Succinamide 0.01%
Yeast extract 0.1%
Ethanol 0.01%
Fragrance 0.01%
2-Hexyldecanoic acid L-carnitine hydrochloride 0.3%
B.
Carboxyvinyl polymer 0.5%
Urea 0.02%
Glucosamine hydrochloride 0.01%
Edetate disodium 0.01%
Purified water 50.0%
C.
Arginine 0.63%
Purified water residue

  Each compounding component of A, B, and C was mixed, A was heated and dissolved at 60 ° C., and B and C were dissolved at room temperature. Next, while stirring A, B was added to A to form a gel, and C was further added and mixed while stirring. Then, it cooled to room temperature and obtained the uniform gel (translucent gel).

(Prescription Example 12)
A.
Glycerin 50.0%
2-Hexyldecanoic acid L-carnitine hydrochloride 0.5%
Tourmaline 5.0%
Olive oil 1.0%
PEG-12 28.0%
PEG-75 7.5%
Polyglyceryl laurate 1.0%
Ethanol 0.49%
(Acrylic acid / alkyl acrylate (C10-30)) copolymer 0.11%
Methylparaben 0.11%
Propylparaben 0.02%
Ginkgo biloba 0.02%
Cha extract 0.02%
Maronnier extract 0.02%
Brown algae extract 0.02%
B.
Carboxyvinyl polymer 0.07%
Purified water 3.0%
C.
Hydroxide Na 0.01%
Purified water residue

  Each compounding component of A, B, and C was mixed, A was heated and dissolved at 60 ° C., and B and C were dissolved at room temperature. Next, while stirring A, B was added to A to form a gel, and C was further added and mixed while stirring. Then, it cooled to room temperature and obtained the uniform gel (translucent gel).

(Prescription Example 13)
A.
Decamethylcyclopentasiloxane 20.0%
Potassium ascorbate 3.0%
2-Butyloctanoic acid L-carnitine hydrochloride 0.3%
B.
Squalane 50.0%
Light liquid isoparaffin Residue dextrin dextrin 8.0%
C.
Octyl paramethoxycinnamate 1.0%
Phenoxyethanol 0.5%
α-Tocopherol 0.1%

  Each compounding component of A, B, and C was weighed, A was kneaded with a bead mill at room temperature, B was heated until evenly dissolved, and C was dissolved at room temperature. Then, while stirring B, C was added to B to make it uniform, and then cooled to room temperature while stirring. Subsequently, A was added thereto and stirred sufficiently to obtain a uniform gel (translucent gel).

[Example 8]
Preparation of cosmetic liquid A cosmetic liquid was prepared according to the following prescription examples 14 to 16. In Formulation Example 14, A
The sum of the -D components was set to 100% in Formulation Example 15, the sum of the A component and the B component in Formulation Example 16, and the sum of the A to C components in Formulation Example 16, respectively.

(Prescription Example 14)
A.
Xanthan gum 0.4%
Hydroxyethyl cellulose 0.1%
Carboxyvinyl polymer 0.1%
1,3-butylene glycol 5.0%
2-Hexyldecanoic acid L-carnitine hydrochloride 0.3%
Purified water 50.0%
B.
Potassium hydroxide (1% aqueous solution) 2.5%
Purified water 10.0%
C.
Caffeine 1.0%
Purified water residue D.
Methylparaben 0.1%
Ethanol 3.0%

  Each compounding component of A, B, C, and D was mixed, A, B, and D were dissolved at room temperature, and C was heated and dissolved at 50 ° C. Then, while stirring A, B was added to A to form a viscous liquid, and then C and D were added and mixed with stirring to obtain a uniform liquid (beauty liquid).

(Prescription Example 15)
A.
1,3-butylene glycol 10.0%
Glycerin 5.0%
Sodium hyaluronate 0.2%
Xanthan gum 0.2%
Dipotassium glycyrrhizinate 0.02%
2-Methyl palmitic acid L-carnitine hydrochloride 0.3%
Purified water residue B.
Ethanol 3.0%
Hydrogenated lecithin 0.5%
Trioctanoin 0.3%
Diphenyl dimethicone 0.2%
Methylparaben 0.22%
Phenoxyethanol 0.08%
PEG-50 hydrogenated castor oil 0.1%
PEG-60 hydrogenated castor oil 0.1%
α-Tocopherol 0.01%
Polyglyceryl myristate-10 0.05%

  Each compounding component of A and B was mixed, and both A and B were heated and dissolved at 50 ° C. Next, while stirring A, B was added to A, mixed while stirring, and cooled with stirring to obtain a uniform liquid (beauty liquid).

(Prescription Example 16)
A.
Xanthan gum 0.4%
Hydroxyethyl cellulose 0.4%
1,3-butylene glycol 3.0%
Glycerin 3.0%
Methylparaben 0.1%
Purified water residue B.
2-Butyloctanoic acid L-carnitine hydrochloride 0.3%
1,2-hexanediol 4.0%
Purified water 50.0%
C.
Ascorbic acid-2-magnesium phosphate 1.5%
Ascorbic acid-2-sodium phosphate 1.5%
Sodium citrate 0.5%
Edetate tetrasodium 0.1%
Purified water 9.4%

  Each compounding component of A, B, and C was mixed, A and C were dissolved at room temperature, and B was heated and dissolved at 50 ° C. Then, while stirring A, B was added to A to make a viscous liquid, and then C was added and mixed with stirring to obtain a uniform liquid (beauty liquid).

[Example 9]
Preparation of cream Cream was prepared according to the following formulation examples 17-19. In addition, in the prescription examples 17-19, the sum total of A component and B component was 100%.

(Prescription Example 17)
A.
Hardened rape oil alcohol 4.2%
Isononyl isononanoate 6.0%
Squalane 9.6%
Octyldodecyl myristate 4.8%
Polyglyceryl monostearate 2.0%
Glyceryl stearate 1.0%
Propylparaben 0.05%
Xanthan gum 0.1%
α-Tocopherol 0.5%
B.
1,3-butylene glycol 4.8%
Glycerin 4.8%
2-Hexyldecanoic acid L-carnitine hydrochloride 0.8%
Sodium ascorbate-2-phosphate-6-palmitate 1.0%
Methylparaben 0.1%
Purified water residue

  Each compounding component of A and B was mixed, and both A and B were heated and dissolved at 85 ° C. Next, while stirring A, B was added to A to emulsify, and further cooled with stirring. Thereafter, stirring was stopped at around 40 ° C. and deaerated to obtain a cream.

(Prescription Example 18)
A cream was obtained in the same manner as in Formulation Example 17 except that 2-hexyldecanoic acid L-carnitine hydrochloride was replaced with 2-methylpalmitic acid L-carnitine hydrochloride.

(Prescription Example 19)
A cream was obtained in the same manner as in Formulation Example 17 except that 2-hexyldecanoic acid L-carnitine hydrochloride was replaced with 2-butyloctanoic acid L-carnitine hydrochloride.

[Example 10]
Manufacture of sheet-like pack Sheet-like packs were produced according to the following prescription examples 20-23. In addition, in the prescription examples 20-23, the sum total of A component and B component was 100%.

(Prescription Example 20)
A.
Glycerin 30.0%
Alumina magnesium hydroxide 1.0%
B.
Diisopropanolamine 1.0%
Sodium polyacrylate 2.0%
Acrylic acid / sodium acrylate (50/50 (molar ratio)) copolymer 2.0%
2-Hexyldecanoic acid L-carnitine hydrochloride 0.3%
Ascorbic acid-2-magnesium phosphate 3.0%
Purified water residue

(Prescription Example 21)
A.
1.3-Butylene glycol 30.0%
Aluminum hydroxide gel / sodium bicarbonate coprecipitate 0.05%
B.
Sodium acrylate / acrylic acid (70/30 (molar ratio)) copolymer 1.0%
Polyacrylic acid 1.0%
N-vinylacetamide / sodium acrylate (9/1 (wt ratio)) copolymer 3.0%
Aluminum lactate 0.05%
Ammonia 10% aqueous solution 0.01%
2-Hexyldecanoic acid L-carnitine hydrochloride 2.0%
Ascorbic acid-2-magnesium phosphate 0.01%
Purified water residue

  In any of the prescription examples, the blending components A and B were mixed, A was dispersed at room temperature, and B was heated and dissolved at 50 ° C. Subsequently, B was returned to room temperature while stirring, and kneaded while gradually adding A to B. The obtained sol was coated on a polypropylene liner with a knife coater with a clearance of 0.5 mm, then a non-woven fabric was stuck on the sol, put in an aluminum laminate bag, heat sealed, and aged for 3 days. A shaped pack was obtained.

(Prescription Example 22)
A sheet-like pack was obtained in the same manner as in Formulation Example 20 except that 2-hexyldecanoic acid L-carnitine hydrochloride was replaced with 2-methylpalmitic acid L-carnitine hydrochloride.

(Prescription Example 23)
A sheet-like pack was obtained in the same manner as in Preparation Example 20, except that 2-hexyldecanoic acid L-carnitine hydrochloride was replaced with 2-butyloctanoic acid L-carnitine hydrochloride.

[Example 11]
Preparation of Pack Agent A pack agent (peel off pack) was prepared according to the following formulation examples 24-26. In the prescription examples 24 to 26, the total sum of the A component and the B component was 100%.

(Prescription Example 24)
A.
Polyvinyl alcohol 13.0%
Carrageenan 0.5%
Purified water residue B.
1,3-butylene glycol 3.0%
Methylparaben 0.1%
Ethanol 8.0%
2-Hexyldecanoic acid L-carnitine hydrochloride 1.0%

  Each compounding component of A and B was mixed, A was heated and swollen at 50 ° C., and B was dissolved at room temperature. Next, while stirring A, B was gradually added to A and mixed. Thereafter, the mixture was cooled while stirring, and the stirring was stopped at around 30 ° C. and left to obtain a peel-off pack.

(Prescription Example 25)
A peel-off pack was obtained in exactly the same manner except that L-carnitine hydrochloride of 2-hexyldecanoic acid in Formulation Example 24 was replaced with L-carnitine hydrochloride of 2-methylpalmitate.

(Prescription Example 26)
A peel-off pack was obtained in the same manner as in Formulation Example 24 except that 2-hexyldecanoic acid L-carnitine hydrochloride was replaced with 2-butyloctanoic acid L-carnitine hydrochloride.

[Example 12]
Preparation of bathing agent Bathing agents were prepared according to the following formulation examples 27 to 28. In Prescription Examples 27 to 28, the total sum of the components was 100%.

(Prescription Example 27)
Tetraoleic acid polyoxyethylene sorbitol 14.0%
Polyoxyethylene oleyl ether 3.0%
Sorbitan sesquioleate 3.0%
Squalane 10.0%
Jojoba oil 20.0%
Avocado oil 5.0%
Propylparaben 0.1%
2-Hexyldecanoic acid L-carnitine hydrochloride 1.0%
Liquid paraffin residue

(Prescription Example 28)
Sodium bicarbonate 35.5%
Citric acid 37.1%
Polyethylene glycol 2.1%
Magnesium oxide 1.1%
α-Tocopherol 1.2%
Ascorbic acid-2-sodium phosphate 1.5%
Ascorbic acid-2-glucoside 1.5%
2-Methyl palmitic acid L-carnitine hydrochloride 0.5%
In any formulation example, all the ingredients were stirred until uniform at room temperature to obtain a bath agent.

[Example 13]
Preparation of Face Wash A face wash was prepared according to the following formulation examples 29-31. In the prescription examples 29 to 30, the sum of the components A to C was set to 100%, and in the prescription example 31, the sum of the components A and B was set to 100%.

(Prescription Example 29)
A.
Myristic acid 15.0%
Palmitic acid 5.0%
Stearic acid 3.0%
Beeswax 3.0%
PEG-6000 2.0%
Ethylene glycol distearate 2.0%
Palm oil fatty acid diethanolamide 3.0%
Concentrated glycerin 15.0%
2-Hexyldecanoic acid L-carnitine hydrochloride 0.5%
B.
Potassium hydroxide 5.5%
Purified water 14.5%
C.
N-lauroyl sarcosine sodium 10.0%
Purified water residue

  Each compounding component of A, B, and C was mixed, A and B were dissolved by heating at 80 ° C., and C was dissolved at room temperature. Next, while stirring A, B was gradually added to A, and then C was added and mixed. Thereafter, the mixture was cooled while stirring, and the stirring was stopped at around 30 ° C. and allowed to stand to obtain a face wash.

(Prescription Example 30)
A face wash was obtained in exactly the same manner as in Example 29 except that 2-hexyldecanoic acid L-carnitine hydrochloride was replaced with 2-methylpalmitic acid L-carnitine hydrochloride.

(Prescription Example 31)
A.
Lauric acid 2.0%
Myristic acid 17.0%
Palmitic acid 4.0%
Stearic acid 4.0%
Palm oil fatty acid potassium 8.0%
Palm oil fatty acid diethanolamide 3.0%
N-cocoyl methyl taurine sodium 10.0%
Concentrated glycerin 10.0%
1,3-butylene glycol 10.0%
2-Butyloctanoic acid L-carnitine hydrochloride 1.0%
B.
Potassium hydroxide 5.5%
Edetate tetrasodium 0.2%
Purified water residue

  Each compounding component of A and B was mixed, A was heated and dissolved at 80 ° C., and C was dissolved at room temperature. Next, while stirring A, B was gradually added to A and mixed. Thereafter, the mixture was cooled while stirring, and the stirring was stopped at around 30 ° C. and allowed to stand to obtain a face wash.

[Example 14]
Preparation of shampoo Shampoos were prepared according to the following formulation examples 32-34. In the prescription examples 32-34, the total sum of the components was 100%.

(Prescription Example 32)
POE (2) Sodium lauryl ether sulfate 30.0%
POE (2) ammonium lauryl ether sulfate 20.0%
Lauryldimethylaminoacetic acid betaine 6.0%
O- [2-hydroxy-3- (trimethylammonio) propyl] hydroxyethylcellulose chloride 0.25%
Palm oil fatty acid diethanolamide 4.0%
Ethylene glycol distearate 2.0%
1,3-butylene glycol 3.0%
Edetate disodium 0.2%
2-Hexyldecanoic acid L-carnitine hydrochloride 1.0%
Purified water residue

  Each of the above ingredients was mixed, dissolved by heating at 80 ° C., and stirred to emulsify. Then, this was cooled with stirring, stirring was stopped at around 30 ° C., and the mixture was allowed to stand to obtain a shampoo.

(Prescription Example 33)
A shampoo was obtained in exactly the same manner except that L-carnitine hydrochloride of 2-hexyldecanoic acid in Formulation Example 32 was replaced with L-carnitine hydrochloride of 2-methylpalmitate.

(Prescription Example 34)
A shampoo was obtained in exactly the same manner except that L-carnitine hydrochloride of 2-hexyldecanoic acid in Formulation Example 32 was replaced with L-carnitine hydrochloride of 2-butyloctanoic acid.

[Example 15]
Preparation of hair tonic Hair tonic was prepared according to the following formulation examples 35-37. In the prescription examples 35 to 37, the total sum of the components was 100%.

(Prescription Example 35)
Salicylic acid 0.3%
Menthol 0.2%
Ethanol 60.0%
Glycerin 5.0%
2-Hexyldecanoic acid L-carnitine hydrochloride 1.0%
Purified water residue The above ingredients were mixed and dissolved at room temperature to obtain a hair tonic.

(Prescription Example 36)
A hair tonic was obtained in exactly the same manner except that L-carnitine hydrochloride of 2-hexyldecanoic acid in Formulation Example 35 was replaced with L-carnitine hydrochloride of 2-methylpalmitate.

(Prescription Example 37)
A hair tonic was obtained in exactly the same manner except that L-carnitine hydrochloride of 2-hexyldecanoic acid in Formulation Example 35 was replaced with L-carnitine hydrochloride of 2-butyloctanoic acid.

FIG. 1 is a graph showing the test substance-derived carnitine derivative and free carnitine concentrations transferred to the dermis side after 24 hours in Example 1. FIG. 2 is a graph showing the remaining rate of the test substance-derived carnitine derivative after a predetermined time has elapsed in the aqueous solution of Example 2.

Claims (8)

A skin external preparation comprising a carnitine derivative represented by the following formula (1) and / or a salt of a carnitine derivative represented by the following formula (2);

(In the formula (1), R ¹ and R ² are methyl group and n-pentyl group, methyl group and n-hexyl group, methyl group and n-octyl group, methyl group and n-decyl group, methyl group and n -Tetradecyl group, methyl group and n-hexadecyl group, ethyl group and ethyl group, ethyl group and n-propyl group, ethyl group and isopropyl group, ethyl group and n-butyl group, ethyl group and isopropyl group, ethyl group and n -Butyl group, ethyl group and n-pentyl group, ethyl group and n-hexyl group, ethyl group and n-octyl group, ethyl group and n-decyl group, ethyl group and n-tetradecyl group, ethyl group and n-hexadecyl Group, n-propyl group and n-propyl group, n-propyl group and n-butyl group, n-propyl group and n-pentyl group, n-propyl group and n-hexyl group, n-butyl group and n-hexyl group Group, n-butyl A combination of a group and an n-octyl group, or an n-hexyl group and an n-octyl group. )

(In formula (2), R ¹ and R ² have the same meanings as in formula (1), and X ⁻ represents hydroxide ion, nitrate ion, sulfate ion, carbonate ion, bicarbonate ion, halide ion, formate ion. An acetate ion, a citrate ion, a tartrate ion, an oxalate ion, a fumarate ion, an anion of a saturated or unsaturated fatty acid having 3 to 20 carbon atoms which may have a branch, an anion of carnitine or a derivative thereof, ascorbic acid An anion selected from the group consisting of anions of ascorbyl phosphate or derivatives thereof , Y ⁺ represents hydrogen ion, sodium ion, potassium ion, calcium ion, magnesium ion, zinc ion, ammonium ion, carnitine or table one cation selected from the group consisting of cations of its derivatives .). The skin external preparation according to claim 1, wherein R ¹ and R ^{2 in the} formulas (1) and (2) are a combination of an n-hexyl group and an n-octyl group . The skin external preparation according to claim 1, wherein R ¹ and R ^{2 in the} formulas (1) and (2) are a combination of a methyl group and an n-tetradecyl group . The skin external preparation according to claim 1, wherein R ¹ and R ^{2 in the} formulas (1) and (2) are a combination of an n-butyl group and an n-hexyl group .   The carnitine derivative represented by the formula (1) and / or the salt of the carnitine derivative represented by the formula (2) is contained in an amount of 0.01 to 20% by mass. An external preparation for skin according to crab.   A cosmetic comprising the carnitine derivative and / or the carnitine derivative salt according to any one of claims 1 to 4 in an amount of 0.01 to 20% by mass. A carnitine derivative represented by the following formula (7):

A carnitine derivative salt represented by the following formula (8):

(In the formula (8), X ⁻ represents hydroxide ion, nitrate ion, sulfate ion, carbonate ion, bicarbonate ion, halide ion, formate ion, acetate ion, citrate ion, tartrate ion, oxalate ion, From the group consisting of a fumarate ion, an anion of a saturated or unsaturated fatty acid having 3 to 20 carbon atoms which may have a branch, an anion of carnitine or a derivative thereof, an anion of ascorbic acid, an anion of ascorbyl phosphate or a derivative thereof Y ⁺ represents one selected from the group consisting of hydrogen ions, sodium ions, potassium ions, calcium ions, magnesium ions, zinc ions, ammonium ions, carnitine or cations of derivatives thereof .

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