通过结合开环聚合和点击化学,已经实现了具有疏水性α-螺旋多肽壳和二氧化硅核的有机可溶性杂化颗粒的合成。以炔丙基胺为引发剂,通过对γ-硬脂基-α - 1-谷氨酸的N-羧基酐进行开环聚合反应,制得末端为炔基的聚(γ-硬脂基-α - 1-谷氨酸)(炔烃-PSLG)。用GPC和MALDI表征了该多肽的分子量和结构,并通过1建立了α-螺旋性质。1 H NMR和FTIR。叠氮化物官能化的二氧化硅颗粒(叠氮二氧化硅)是通过使用3-溴丙基三氯硅烷对二氧化硅颗粒进行官能化,然后用叠氮化钠进行亲核取代来制备的。FTIR和XPS证实了叠氮化物的功能化。在五甲基二亚乙基三胺和溴化铜(I)存在下,在四氢呋喃或甲苯中通过点击反应将炔烃-PSLG与叠氮基二氧化硅偶联。使用XPS,FTIR和1进一步表征产品1 H NMR表明,接枝的多肽保留了其α-螺旋性质并形成了易于分散在有机溶剂中的胶体颗粒。这些疏水的,多肽功能化的颗
Stereochemical studies in crystal nucleation. Oriented crystal growth of glycine at interfaces covered with Langmuir and Langmuir-Blodgett films of resolved .alpha.-amino acids
GLUTAMATE DERIVATIVES FOR TOPICAL USE AS IMMUNOMODULATORY ACTIVE INGREDIENT
申请人:PIERRE FABRE DERMO-COSMETIQUE
公开号:US20160060208A1
公开(公告)日:2016-03-03
The present invention relates to L-glutamate-derived compounds of general formula (1) in which the R radical is a linear or branched C
5
to C
2
alkyl group, .—or the benzyl radical, .—or the phenethyl radical, for topical use as a medicament (or as a dermatological active ingredient) intended for the treatment and/or prevention of inflammatory dermatoses.
An Unconventional Method for Purifying the N-carboxyanhydride Derivatives of γ-alkyl-L-glutamates
作者:Drew S. Poché、Michael J. Moore、Jennifer L. Bowles
DOI:10.1080/00397919908086042
日期:1999.3
Abstract Common impurities in the phosgenation of α -amino acids to produce their N-carboxyanhydride (NCA) derivatives include hydrogen chloride and the hydrochloride salt of the starting amino acid. These impurities can be effectively removed by washing the reaction mixture with water and aqueous bicarbonate at 0 °C prior to isolation of the NCA., despite the well known sensitivity of the NCA to water
A composition suitable for topical application to mammalian skin and hair for inducing, maintaining or increasing hair growth comprises a hair growth promoter chosen from glutamic acid derivatives and salts thereof. The composition preferably also comprises an activity enhancer which may be chosen from hair growth stimulants, penetration enhancers and cationic polymers.
A water-soluble fullerene topical composition, a preparation method therefor, and an application. The composition comprises a water-soluble additive, and a fullerene dissolved or dispersed in the water-soluble additive. The composition has a cosmetic effect.
N?-LONG CHAIN ACYLIDINE CRYSTAL PRODUCTION METHOD AND COMPOSITION CONTAINING SAID CRYSTALS
申请人:AJINOMOTO CO., INC.
公开号:EP3992175A1
公开(公告)日:2022-05-04
An unground Nε-long chain acyl lysine crystal production method that includes: preparing a solution having at least one type of Nε-long chain acyl lysine dissolved in an acidic or basic solvent including water and/or one type selected from water-soluble organic solvents; dipping the solution into an acidic solution having a pH of at least 0.2 and less than 2.0, at a temperature of no more than 20°C; and crystallizing Nε-long chain acyl lysine crystals.