摘要 我们报告了一种新型的合成咪唑并[1,5 - a ]吡啶-1-羧酸的有效方法。通过使2-(氨基甲基)吡啶与酰氯反应,然后用三氟乙酸酐一锅处理,得到2,2,2-三氟-1-咪唑并[1,5 - a ]吡啶-1-丙酮酮,然后通过卤代形式裂解以高制备产率将其转化为咪唑并[1,5 - a ]吡啶-1-羧酸。 我们报告了一种新型的合成咪唑并[1,5 - a ]吡啶-1-羧酸的有效方法。通过使2-(氨基甲基)吡啶与酰氯反应,然后用三氟乙酸酐一锅处理,得到2,2,2-三氟-1-咪唑并[1,5 - a ]吡啶-1-丙酮酮,然后通过卤代形式裂解以高制备产率将其转化为咪唑并[1,5 - a ]吡啶-1-羧酸。
The outcome of the amidation reaction mediated by PPh3–I2 was found to be highly dependent on the addition sequence of the reagents.
PPh3-I2介导的酰胺化反应的结果被发现高度依赖试剂的加入顺序。
Pharmaceutical applications of hydrotropic agents, polymers thereof, and hydrogels thereof
申请人:——
公开号:US20030031715A1
公开(公告)日:2003-02-13
The present invention is directed to compounds effective for increasing the water solubility of poorly soluble drugs. Hydrotropic agents are identified, such as for increasing the solubility of paclitaxel. Polymerizable monomers of the hydrotropic agents are prepared and hydrotropic polymers formed from such monomers are generated. Both the monomers and resulting polymers increase the solubility of poorly soluble drugs. In some cases, the hydrotropic polymers are more effective at increasing solubility at low concentrations relative to a corresponding amount of the hydrotropic agent precursor. Additionally, the hydrotropic polymers (hytrops) can be crosslinked to yield hydrotropic hydrogels (hytrogels) capable of solubilizing a drug. The hytrogels can further be employed to generate micro- and nano-particle suspensions of a poorly soluble drug. The water solubility of paclitaxel can be increased by four orders of magnitude using compounds of the invention. Large molecular weight compounds, such as the hytrops and hytrogels, are expected to have low levels of absorption in the gastrointestinal tract, thereby making them particularly preferred for oral delivery of poorly soluble drugs.
Methods and compositions for providing broad spectrum photo protection using antioxidants
申请人:L'OREAL
公开号:US10137072B2
公开(公告)日:2018-11-27
The present disclosure relates to methods and compositions for providing at least broad spectrum photo protection to skin, which includes protection from at least infrared (IR) radiation and/or visible light. The methods typically entail applying to skin a cosmetic composition comprising: (a) one or more antioxidants selected from the group consisting of baicalin, Venuceane™, ferulic acid, polydatin, silymarin, punica granatum extract, mango leaf extract, soliprin, catechin, hesperetin, astilbin, and DHC V; (b) optionally, one or more solubilizers; and (c) a cosmetically acceptable carrier; wherein the combination of (a), optional (b), and (c) alone, provide at least broad spectrum protection from both infrared (IR) radiation and visible light. UV filters can also optionally be included to provide additional protection from UV light.
本公开涉及为皮肤提供至少广谱光保护的方法和组合物,其中包括保护皮肤免受至少红外(IR)辐射和/或可见光的伤害。这些方法通常需要向皮肤施用化妆品组合物,该组合物包含(a) 一种或多种抗氧化剂,选自黄芩苷、Venuceane™、阿魏酸、多靛红、水飞蓟素、石榴提取物、芒果叶提取物、茄红素、儿茶素、橙皮素、天冬素和 DHC V 组成的组;(b) 可选的一种或多种增溶剂;以及 (c) 化妆品可接受的载体;其中,(a)、可选的(b)和(c)的组合可单独提供对红外线(IR)辐射和可见光的至少广谱保护。还可选择加入紫外线过滤剂,以提供额外的紫外线防护。
Cosmetic compositions and methods for providing full spectrum photo protection
申请人:L'OREAL
公开号:US10149808B2
公开(公告)日:2018-12-11
The present disclosure relates to compositions and methods for providing full spectrum photo protection to skin, which includes protection from infrared (IR) radiation and/or visible light in addition to protection from UV radiation. The compositions typically include: (a) silymarin; (b) one or more antioxidants selected from the group consisting of ferulic acid, Vitamin C, polydatin, and hesperetin; (c) optionally, one or more solubilizers; and (d) a cosmetically acceptable carrier. The compositions are unique in that the combination of (a), (b), optional (c), and (d) alone, provide at least full spectrum protection from ultraviolet radiation (UV), visible light, and infrared radiation (IR). The composition can additionally, optionally, include one or more UV filters to further enhance protection from UV radiation.
Aqueous compositions with mangiferin for cosmetic applications
申请人:L'OREAL
公开号:US10624830B2
公开(公告)日:2020-04-21
A cosmetic composition and a method of preparing a cosmetic composition that includes mangiferin characterized as demonstrating soluble and chemically stable mangiferin, wherein stability includes resistance to crystallization of mangiferin that is independent of temperature and pH.