Abstract:
A hydroxamic acid derivative is provided to induce the activity increase of each promoter of IDH3alpha and CPT1 involving with energy consumption metabolism, thereby being usefully used for preventing or treating diseases related to dyslipidemia such as obesity, hyperlipidemia and diabetes. A hydroxamic acid is represented by a formula(1), wherein R1 is CONH, NHCO, CONR4 or NR4CO(where R4 is H or C1-10 alkyl); R2 is -(CH2)n-(where n is 0 or 1); and R3 is H or C1-10 alkyl. A method for preparing the hydroxamic acid comprises the steps of: (a) reacting an anhydrous compound synthesized by reacting ethyl chloroformate with piperonic acid using pyridine or N-methyl morpholine as a solvent with methyl 4-amino benzoate or 4-amino phenyl acetic acid ethyl ester at a temperature of 10-20 deg.C using pyridine or N-methyl morpholine as a solvent to prepare a benzamide compound; (b) reacting the benzamide with an alkyl halide selected from the group consisting of bromomethane, bromoethane, bromopropane, bromo isopropane, bromo butane, and bromo tert-butane to substitute an amide bond of the benzamide with an alkyl group; (c) hydrolyzing methyl ester in the benzamide obtained from the step(a) or the benzamide compound obtained from the step(b) to prepare an acid and reacting the acid with ethyl chloroformate using pyridine or N-methyl morpholine as a solvent to covert the acid into an anhydrous compound; and (d) reacting the anhydrous compound with hydroxyl amine chloride or N-methyl hydroxyl amine chloride at a temperature of 0-10 deg.C using pyridine or N-methyl morpholine as a solvent to obtain the product of the formula(1). An agent for anti-obese, treating diabetes or hyperlipidemia comprises the hydroxamic acid.
Abstract:
A skin external composition comprising a cathepsin G inhibitor is provided to prevent an adhesion protein from being degraded by intrinsic aging and photo-aging, reduce the production of metalloproteinase and inhibit the activity of metalloproteinase, thereby being more potent anti-aging substance than existing anti-aging substances. A method for screening anti-aging materials is provided to develop the anti-aging materials which effectively inhibit the quantitative and qualitative increase of metalloproteinase, resulting from the degradation of an adhesion protein by cathepsin G in skin cells without direct UV irradiation. A skin external composition for preventing skin aging comprises 0.01-10 wt% a cathepsin G inhibitor as an effective ingredient, wherein the cathepsin G inhibitor is at least one selected from the group consisting of compounds represented by formulae(1) to (4). The composition is formulated into skin lotion, astringent lotion, milk lotion, nourishing cream, essence, massage cream, eye cream, pack, body lotion, body cream, body oil or body essence. A method for screening an anti-aging material comprises the steps of: (a) adding an anti-aging candidate material to a substrate in the presence of cathepsin G enzyme; and (b) measuring the inhibition of activity of the cathepsin G enzyme. Further, the measure of the inhibition of activity of the cathepsin G enzyme is performed by measuring a concentration of a produced metalloprotease.
Abstract:
Provided is a 3,5-dihydroxybenzoic acid derivative, which shows an elastase inhibitory effect and an excellent effect of scavenging free radicals generated by UV irradiation, has an excellent anti-aging effect, and is useful for an anti-aging cosmetic composition. The 3,5-dihydroxybenzoic acid derivative is a compound represented by a formula 1, substituted with hydroxyl groups at 3,5-position thereof and the amide group being substituted with a bulky substituent. The 3,5-dihydroxybenzoic acid derivative is obtained by the method comprising the steps of: (A) reacting 3,5-dihydroxybenzoic acid with acetic anhydride to form 3,5-diacetyloxybenzoic acid; (B) forming an amide compound from the 3,5-diacetyloxybenzoic acid by using ethyl chloroformate and an oleophilic group; and (C) hydrolyzing the acetyl group of the amide compound to provide a 3,5-dihydroxybenzoic acid derivative.
Abstract:
본 발명은 펜타에리스리톨 유도체가 포집된 메조포러스 다공성 실리카 복합 분체 및 그 제조방법에 관한 것으로서, 보다 상세하게는 높은 흡유량을 가진 다공성 실리카에 피부 각질층의 수분 유지 능력을 향상시키고, 특히 건조환경에서도 높은 보습력을 보이는 펜타에리스리톨 유도체가 포집된 메조포러스 다공성 실리카 복합 분체 및 그 제조방법에 관한 것이다. 펜타에리스리톨 유도체, 수분유지능력, 보습력, 다공성 실리카
Abstract:
Sesamol derivatives and a process for preparing the same compounds are provided to improve anti-oxidizing activity and stability of sesamol, recover the skin damaged by reactive oxygen species, prevent aging of biological membranes, and inhibit production of peroxides of unsaturated fatty acid and its derivatives. The sesamol derivatives represented by the formula(1) are provided, wherein the sesamol derivatives are prepared by reacting sesamol with adamantanol in an equivalence ratio of 1:1.0~1.3 under acid condition, and recrystallizing the resulting product in polar solvent; the acid is hydrochloric acid, nitric acid, sulfuric acid, p-toluenesulfonic acid, benzene sulfonic acid, acetic acid, trichloroacetic acid or trifluoroacetic acid; the solvent used in the reaction is dichloromethane, tetrahydrofuran, ethyl acetate, acetonitrile, chloroform, ethyl ether, trichloro ethylene, benzene or toluene; and the polar solvent is methanol, ethanol, isopropanol, acetone, acetonitrile or water.