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    • 6. 发明申请
    • METHODS FOR POST-FABRICATION FUNCTIONALIZATION OF POLY(ESTER UREAS)
    • 聚酯(ESTER UREAS)后制备功能化方法
    • WO2015048728A1
    • 2015-04-02
    • PCT/US2014/058264
    • 2014-09-30
    • BECKER, MatthewLIN, FeiTHE UNIVERSITY OF AKRON
    • BECKER, MatthewLIN, Fei
    • C07C229/00C08G63/91C08G75/02C08G77/04
    • C08G71/02C07C227/18C07C229/34C07C247/04C07C275/16C08G2230/00C09D175/02
    • Amino acid-based poly(ester urea)s (PEU) are emerging as a class of polymers that have shown promise in regenerative medicine applications. Embodiments of the invention relate to the synthesis of PEUs carrying pendent "clickable" groups on modified tyrosine amino acids. The pendent species include alkyne, azide, alkene, tyrosine-phenol, and ketone groups. PEUs with Mw exceeding 100k Da were obtained via interfacial polycondensation methods and the concentration of pendent groups was varied by copolymerization. The incorporation of derivatizable functionalities is demonstrated using 1H NMR and UV-Vis spectroscopy methods. Electrospinning was used to fabricate PEU nanofibers with a diameters ranging from 350 nm to 500 nm. The nanofiber matricies possess mechanical strengths suitable for tissue engineering (Young's modulus: 30045 MPa; tensile stress: 8.51.2 MPa). A series of bioactive peptides and fluorescent molecules were conjugated to the surface of the nanofibers following electrospinning using bio-orthogonal reactions in aqueous media.
    • 氨基酸类聚(酯尿素)(PEU)正在出现,这些聚合物在再生医学应用中已显示出希望。 本发明的实施方案涉及在修饰的酪氨酸氨基酸上携带侧面的“可点击”基团的PEU的合成。 悬挂物种包括炔烃,叠氮化物,烯烃,酪氨酸 - 苯酚和酮基团。 通过界面缩聚方法得到Mw超过100kDa的PEU,通过共聚改变侧基的浓度。 使用1 H NMR和UV-Vis光谱法证明可衍生化官能度的结合。 使用静电纺丝制造直径范围为350nm至500nm的PEU纳米纤维。 纳米纤维母材具有适用于组织工程的机械强度(杨氏模量:30045MPa;拉伸应力:8.51.2MPa)。 在水性介质中使用生物正交反应进行静电纺丝后,将一系列生物活性肽和荧光分子缀合到纳米纤维的表面。
    • 9. 发明申请
    • FORMATION OF N-PROTECTED BIS-3,6-(4-AMINOALKYL) -2,5,DIKETOPIPERAZINE
    • 形成N-保护的BIS-3,6-(4-氨基二甲基)-2,5,二酮类
    • WO2012109256A3
    • 2013-01-24
    • PCT/US2012024160
    • 2012-02-07
    • MANNKIND CORPFREEMAN JOHN JSTAMPER ADRIENNEHEITMANN MELISSA
    • FREEMAN JOHN JSTAMPER ADRIENNEHEITMANN MELISSA
    • C07D241/08B01J31/02C07C229/00
    • C07D241/08B01J31/0225B01J31/0258B01J31/0259B01J2231/40
    • The disclosed embodiments detail improved methods for the synthesis of diketopiperazines from amino acids. In particular improved methods for the cyclocondensation and purification of N-protected 3,6-(aminoalkyl)-2,5-diketopiperazines from N-protected amino acids. Disclosed embodiments describe methods for the synthesis of 3,6-bis-[N-protected aminoalkyl]-2,5-diketopiperazine comprising heating a mixture of an amino acid in the presence of a catalyst in an organic solvent. The catalyst is selected from the group comprising sulfuric acid, phosphoric acid, p-toluenesulfonic acid, 1 -propylphosphonic acid cyclic anhydride, tributyl phosphate, phenyl phosphonic acid and phosphorous pentoxide among others. The solvent is selected from the group comprising: dimethylacetamide, N-methyl-2-pyrrolidone, diglyme, ethyl glyme, proglyme, ethyldiglyme, m-cresol, p-cresol, o-cresol, xylenes, ethylene glycol and phenol among others.
    • 所公开的实施方案详细描述了从氨基酸合成二酮哌嗪的改进方法。 特别是用于由N-保护的氨基酸环化缩合和纯化N-保护的3,6-(氨基烷基)-2,5-二酮哌嗪的改进方法。 公开的实施方案描述了合成3,6-双[N-保护的氨基烷基] -2,5-二酮哌嗪的方法,包括在催化剂存在下在有机溶剂中加热氨基酸的混合物。 催化剂选自硫酸,磷酸,对甲苯磺酸,1-丙基膦酸环状酸酐,磷酸三丁酯,苯基膦酸和五氧化二磷等。 溶剂选自二甲基乙酰胺,N-甲基-2-吡咯烷酮,二甘醇二甲醚,甘醇二甲醚,丙二醇,乙基二甘醇二甲醚,间甲酚,对甲酚,邻甲酚,二甲苯,乙二醇和苯酚等。
    • 10. 发明申请
    • FORMATION OF N-PROTECTED BIS-3,6-(4-AMINOALKYL) -2,5,DIKETOPIPERAZINE
    • 形成N-保护的BIS-3,6-(4-氨基二甲基)-2,5,二酮类
    • WO2012109256A2
    • 2012-08-16
    • PCT/US2012/024160
    • 2012-02-07
    • MANNKIND, CORPFREEMAN, John, J.STAMPER, AdrienneHEITMANN, Melissa
    • FREEMAN, John, J.STAMPER, AdrienneHEITMANN, Melissa
    • C07D241/08C07C229/00B01J31/02
    • C07D241/08B01J31/0225B01J31/0258B01J31/0259B01J2231/40
    • The disclosed embodiments detail improved methods for the synthesis of diketopiperazines from amino acids. In particular improved methods for the cyclocondensation and purification of N-protected 3,6-(aminoalkyl)-2,5-diketopiperazines from N-protected amino acids. Disclosed embodiments describe methods for the synthesis of 3,6-bis-[N-protected aminoalkyl]-2,5-diketopiperazine comprising heating a mixture of an amino acid in the presence of a catalyst in an organic solvent. The catalyst is selected from the group comprising sulfuric acid, phosphoric acid, p-toluenesulfonic acid, 1 -propylphosphonic acid cyclic anhydride, tributyl phosphate, phenyl phosphonic acid and phosphorous pentoxide among others. The solvent is selected from the group comprising: dimethylacetamide, N-methyl-2-pyrrolidone, diglyme, ethyl glyme, proglyme, ethyldiglyme, m-cresol, p-cresol, o-cresol, xylenes, ethylene glycol and phenol among others.
    • 所公开的实施方案详细描述了从氨基酸合成二酮哌嗪的改进方法。 特别是用于由N-保护的氨基酸环化缩合和纯化N-保护的3,6-(氨基烷基)-2,5-二酮哌嗪的改进方法。 公开的实施方案描述了合成3,6-双[N-保护的氨基烷基] -2,5-二酮哌嗪的方法,包括在催化剂存在下在有机溶剂中加热氨基酸的混合物。 催化剂选自硫酸,磷酸,对甲苯磺酸,1-丙基膦酸环状酸酐,磷酸三丁酯,苯基膦酸和五氧化二磷等。 溶剂选自二甲基乙酰胺,N-甲基-2-吡咯烷酮,二甘醇二甲醚,甘醇二甲醚,丙二醇,乙基二甘醇二甲醚,间甲酚,对甲酚,邻甲酚,二甲苯,乙二醇和苯酚等。