CAS: 2068-02-2; 2-(3,4-Dihydroxyphenyl)-5-Hydroxy-3,7-Dimethoxy-4H-Chromen-4-One

上下游产品

diazomethane quercetol 2-(3,4-bis-benzyloxy-phenyl)-5-hydroxy-3,7-dimethoxy-chromen-4-one methanol 5-acetoxy-2-(3,4-diacetoxy-phenyl)-3,7-dimethoxy-chromen-4-one rhamnetin 3',4'-diacetyloxy-3'-hydroxy-3,7-dimethoxyflavone 2-(3,4-diacetoxy-phenyl)-3,5,7-trimethoxy-chromen-4-one

📜槲皮素置于potassium Carbonate,溶剂黄146体系中,用 二苯醚,水,丙酮 用作溶剂,化学反应 10.5H,反应生成5,3',4'-三羟基-3,7-二甲氧基黄酮
参考文献:槲皮素衍生物及其制备方法和应用
标题:槲皮素衍生物及其制备方法和应用
摘要:本发明公开了一种槲皮素的衍生物及其制备方法和应用,该制备方法首先用二氯二苯基甲烷保护槲皮素邻二酚羟基,并结合苄基保护基,得到选择性保护的槲皮素衍生物,再分别单独与硫酸二甲酯,硫酸二乙酯,烯丙基溴,对甲苯磺酰氯和乙酸酐进行反应,生成相应的槲皮素衍生物.所制备的衍生化合物都表现出优于槲皮素的抑制nrk‑49F增殖活性.其中,甲基和对甲苯磺酰基复合取代的槲皮素衍生物20A‑1,14A‑2和23D‑1表现出更加非常好的抑制nrk‑49F增殖活性,抑制率分别达到86.33%,78.04%,75.91%.可见,目前得到的槲皮素衍生化产物对肾成纤维细胞nrk‑49F增殖有明显的抑制作用.

专利信息

专利号:US-7598291-B2
优先权日:2004-09-02
标题 :Methods and compositions for enhancing collagen and proteoglycan synthesis in the skin
发明人：NIMNI MARCEL; HAN BO
权利人:NIMNI MARCEL; HAN BO
摘要:A composition for application to the skin can stimulate the in vivo synthesis of collagen and proteoglycans and improve the appearance of the skin, increasing its elasticity and fullness. In general, a composition according to the present invention comprises: (1) an antioxidant compound in a quantity sufficient to enhance collagen synthesis in the skin; (2) an organic penetrant in which the antioxidant compound is soluble in a sufficient quantity that a concentration of the antioxidant compound sufficient to enhance collagen synthesis can be applied topically and penetrate the skin; (3) a mixture of essential amino acids; (4) a supplemental source of sulfur; and (5) a topical pharmaceutically acceptable carrier. The antioxidant compound can be lipoic acid, a lipoic acid analogue or derivative, a bioflavonoid, a constituent of ginkgo, or an isoflavone. The organic penetrant is preferably benzyl alcohol. Other ingredients, such as esters of tocopherol and ascorbic acid, can be included.

专利号:US-2010160244-A1
优先权日:2004-09-02
标 题 :Methods and compositions for enhancing collagen, proteoglycan, and glutathione synthesis in the skin
发明人：NIMNI MARCEL; HAN BO
权利人:NIMNI MARCEL; HAN BO
摘要:A composition for application to the skin can stimulate the in vivo synthesis of collagen and proteoglycans and improve the appearance of the skin, increasing its elasticity and fullness. In general, a composition according to the present invention comprises: (1) an antioxidant compound in a quantity sufficient to enhance collagen synthesis in the skin; (2) an organic penetrant in which the antioxidant compound is soluble in a sufficient quantity that a concentration of the antioxidant compound sufficient to enhance collagen synthesis can be applied topically and penetrate the skin; (3) a mixture of essential amino acids or hydrolyzed whey protein; (4) a supplemental source of sulfur; and (5) a topical pharmaceutically acceptable carrier. The antioxidant compound can be lipoic acid or a lipoic acid analogue or derivative. The organic penetrant is preferably benzyl alcohol. Other ingredients, such as esters of tocopherol and ascorbic acid, can be included.

专利号:US-2002165207-A1
优先权日:2001-05-02
标题 :Compositions and methods for the treatment of diabetic neuropathy
发明人：ROSENBLOOM RICHARD
摘要:Compositions and a method for the treatment of diabetic neuropathy is disclosed. The compositions comprise a mixture of a compound that promotes synthesis of nerve growth factor, an aldose reductase inhibitor and an antioxidant, optionally formulated in a pharmaceutically acceptable carrier. This combination of active agents provides significant, effective relief of the symptoms of diabetic neuropathy, as well as at least partial recovery of lost neurological function in some cases. In addition, the compositions of the present invention, when used in effective amounts to treat diabetic neuropathy, do not exhibit the severe side effects of many prior art compositions proposed for treatment of this ailment. n In a second aspect, a method for the administration of a composition in accordance with the present invention for the treatment of diabetic neuropathy is disclosed. In the method, an effective amount of the composition of the invention is administered on a regular basis over a period of time sufficient to provide the beneficial effects of relief from the symptoms of diabetic neuropathy, as well as at least some recovery of the damaged nerve tissues.

专利号:US-2005004225-A1
优先权日:2003-04-16
标题:Oxidoreductase inhibitors and methods of screening and using thereof
发明人：BALENDIRAN GANESARATNAM K
摘要:The present invention relates to 1) the design and synthesis of analogs to glutathione conjugates which bind to or interact with aldose reductase (AR) through unique conformations that are distinctly different from the substrates and inhibitors of AR which are members of sugar metabolism; 2) the screening of the analogs to identify those that interact with or inhibit or enhance the activity of AR; and 3) the use of AR ligands, AR inhibitors (AR antagonsits) or AR enhancer (AR agonists) in the detection of AR activity, the modulation of AR activity, and the treatment of conditions in a subject in need of modulating AR activity. Such conditions include but not limited to cardiovascular disease, diabetes, artheriosclerosis, cancer, neoplasm, obesity, cataract, retinopathy, keratopathy, nephropathy, neurosis, thrombosis, faulty union of corneal injury and neuropathy. Examples of the treatment include the use of fibrates as AR inhibitors to treat these conditions.

专利号:US-2007232495-A1
优先权日:2006-03-24
标题:Compositions and methods to add value to plant products, increasing the commercial quality, resistance to external factors and polyphenol content thereof
发明人：NAPPA ALVARO O; LORENZINI FELIPE C; SANHUEZA ANDRES L
权利人:NAPPA ALVARO O; LORENZINI FELIPE C; SANHUEZA ANDRES L
摘要:The invention is related to compositions and methods that naturally protect plant tissues against ultraviolet radiation and temperature, thus giving protection against sunburn to plants, plant parts, fruits and/or flowers during their development. The invention is also related to compositions and methods to naturally improve the color of plants, plant parts, fruits and/or flowers by inducing the natural synthesis of flavonoids and anthocyanins present in plants. Likewise, the present invention is directed to improving the nutritional value of plants, plant parts, fruits and/or flowers by increasing the normal levels of polyphenolic compounds, especially flavonoids, present therein. Additionally, the present invention is related to compositions and methods that give more resistance to plants, plant parts, fruits and/or flowers against pathogens as bacteria and fungi. Finally, the present invention is related to plants, plant parts, fruits, flowers and/or propagating material treated with the compositions described in the present document.

专利号:US-8257754-B2
优先权日:2002-10-21
标 题:Synergistic compositions that treat or inhibit pathological conditions associated with inflammatory response
发明人：TRIPP MATTHEW L; BABISH JOHN G; BLAND JEFFREY S; DARLAND GARY K; LERMAN ROBERT; LUKACZER DANIEL O; LISKA DEANN J; HOWELL TERRENCE M
权利人:TRIPP MATTHEW L; BABISH JOHN G; BLAND JEFFREY S; DARLAND GARY K; LERMAN ROBERT; LUKACZER DANIEL O; LISKA DEANN J; HOWELL TERRENCE M; METAPROTEOMICS LLC
摘要:A natural formulation of compounds that would to modulate inflammation is disclosed. The formulation would also inhibit expression of COX-2, inhibit synthesis of prostaglandins selectively in target cells, and inhibit inflammatory response selectively in target cells. The compositions containing at least one fraction isolated or derived from hops. Other embodiments relate to combinations of components, including at least one fraction isolated or derived from hops, tryptanthrin and conjugates thereof, rosemary, an extract or compound derived from rosemary, a triterpene species, or a diterpene lactone or derivatives or conjugates thereof.