[EN] METHOD FOR PREPARATION OF N-CARBOXYANHYDRIDES<br/>[FR] PROCÉDÉ DE PRÉPARATION DE N-CARBOXYANHYDRIDES
申请人:LONZA AG
公开号:WO2020064904A1
公开(公告)日:2020-04-02
The invention discloses a method for the preparation off N-carboxyanhydrides (NCAs) by reaction of amino acids with phosgene.(II)
本发明公开了一种通过氨基酸与光气反应来制备N-羧酸酐(NCAs)的方法。
Über die Reaktion von α‐Aminosäure‐
<i>N</i>
‐carbonsäure‐anhydriden mit
<i>N</i>
‐silylierten prim. und sek. Aminen
作者:Hans R. Kricheldorf、Gerd Greber
DOI:10.1002/cber.19711041022
日期:1971.10
Die Umsetzung von Aminosäure-N-carbonsäure-anhydriden (1) (Oxazolidindionen-(2.5)) mit N-silylierten Aminen führt nicht wie dieReaktionmitAminen zu Oligo- oder Polypeptiden. Als Reaktionsprodukte entstehen N-Trimethylsiloxycarbonyl-aminosäure-amide (2) neben Hydantoinsäure-silylestern (12), die nach Hydrolyse als Aminosäureamide (4) und Hydantoinsäuren (5) isoliert wurden. Die Umsetzung N-silylierter
Enzyme responsive supramolecular hydrogels assembled from nonionic peptide amphiphiles
作者:Rui Liu、Zhekun Shi、Jing Sun、Zhibo Li
DOI:10.1007/s11426-018-9282-4
日期:2018.10
Smart peptide hydrogels are of great interest for their great potential applications. Here, we report a facile approach to prepare a class of enzyme-responsive hydrogels in a scalable manner. These hydrogels self-assemble from a family of nonionic peptide amphiphiles (PAs) synthesized by sequential ring-opening polymerization (ROP) of γ-benzyl-L-glutamate N-carboxyanhydride (BLG-NCA) and L-tyrosine
智能肽水凝胶因其巨大的潜在应用而备受关注。在这里,我们报告了一种简便的方法,以可扩展的方式制备一类酶响应水凝胶。这些水凝胶由一系列非离子肽两亲物(PAs)自组装而成,这些非离子肽两亲物由γ-苄基-L-谷氨酸N-羧基酐(BLG-NCA)和L-酪氨酸N的顺序开环聚合(ROP)合成-羧基酐(Tyr-NCA),然后进行氨解。这些PA样品可以容易地形成具有低至0.5重量%的临界凝胶浓度的透明水凝胶。酪氨酸残基的结合提供疏水性,氢键相互作用和酶响应特性。在辣根过氧化物酶(HRP)和过氧化氢(H 2 O 2)存在下,在生理条件下观察到水凝胶向纳米凝胶的转变。获得的PA水凝胶是新一代智能支架的理想候选者。
Hydrogen bonding interactions affect the hierarchical self-assembly and secondary structures of comb-like polypeptide supramolecular complexes displaying photoresponsive behavior
作者:Mohamed Gamal Mohamed、Jia-Huei Tu、Shih-Hung Huang、Yeo-Wan Chiang、Shiao-Wei Kuo
DOI:10.1039/c6ra07907e
日期:——
this study we blended 4-(4-hexadecylphenylazo)pyridine (AzoPy-C16), synthesized through facile diazonium and monoetherification reactions, with polytyrosine (PTyr) to form comb-like polypeptide supramolecular complexes stabilized through hydrogen bonding between the pyridyl...
Separated Coil and Chain Aggregation Behaviors on the Miscibility and Helical Peptide Secondary Structure of Poly(tyrosine) with Poly(4-vinylpyridine)
作者:Yi-Syuan Lu、Yung-Chih Lin、Shiao-Wei Kuo
DOI:10.1021/ma301179t
日期:2012.8.28
separated randomcoils of the PTyr chains. The increased degree of hydrogen bonding within the PTyr/P4VP complexes formed from MeOH solutions resulted in interpolymer complex aggregates; the corresponding enhanced intermolecular hydrogen bonding of PTyr with P4VP resulted in β-sheet conformations for PTyr, as evidenced from Fourier transform infrared spectroscopy, solid state nuclearmagnetic resonance