Peptide Bond Hydrolysis Catalyzed by the Wells–Dawson Zr(α<sub>2</sub>-P<sub>2</sub>W<sub>17</sub>O<sub>61</sub>)<sub>2</sub> Polyoxometalate
作者:Gregory Absillis、Tatjana N. Parac-Vogt
DOI:10.1021/ic301364n
日期:2012.9.17
this paper we report the first example of peptide hydrolysis catalyzed by a polyoxometalate complex. A series of metal-substituted Wells–Dawson polyoxometalates were synthesized, and their hydrolytic activity toward the peptidebond in glycylglycine (GG) was examined. Among these, the Zr(IV)- and Hf(IV)-substituted ones were the most reactive. Detailed kinetic studies were performed with the Zr(IV)-substituted
在本文中,我们报告了由多金属氧酸盐配合物催化的肽水解的第一个实例。合成了一系列金属取代的Wells-Dawson多金属氧酸盐,并研究了它们对甘氨酸甘氨酸(GG)中肽键的水解活性。其中,Zr(IV)-和Hf(IV)-取代的那些反应性最高。详细的动力学研究使用的锆(IV)取代的Wells-Dawson型多金属氧酸盐进行ķ 15 H [锆(α 2 -P 2 w ^ 17 ö 61)2 ]·25H 2将其示出O操作充当催化剂GG中肽键的水解。K的形态15 H [锆(α 2 -P 2w ^ 17 ø 61)2 ]·25H 2 ö其是高度依赖于PD,浓度,和溶液的温度,得到了充分的帮助下确定31 P NMR光谱和其对GG水解速率的影响进行了研究。在pD 5.0和60°C时观察到最高反应速率(k obs = 9.2(±0.2)×10 –5 min –1)。有10倍过量的GG在K的存在下进行水解15 H [锆(α
Synthese von Serinpeptiden I
作者:H. Voss
DOI:10.1515/znb-1965-0205
日期:1965.2.1
Es wird über die Synthese einer Reihe von N-Carbobenzoxy-aminosäuren und -peptidsäuren sowie Aminosäure- und Peptidbenzylester-Derivaten, die als Ausgangsprodukte zur Darstellung verschiedener Serinpeptide dienten, berichtet.
En Route to a Heterogeneous Catalytic Direct Peptide Bond Formation by Zr-Based Metal–Organic Framework Catalysts
作者:Francisco de Azambuja、Alexandra Loosen、Dragan Conic、Maxime van den Besselaar、Jeremy N. Harvey、Tatjana N. Parac-Vogt
DOI:10.1021/acscatal.1c01782
日期:2021.7.2
assists in lowering the barrier of key proton transfers. The proposed concepts were also used to study the formation of intermolecular peptide bond formation. While intrinsic challenges associated with the catalyst structure and water removal limit a more general intermolecular reaction scope under current conditions, the results suggest that further design of Zr-MOF catalysts could render these materials
Structural and NMR investigations of the ternary adducts of twenty α-amino acids and selected dipeptides with a chiral, diaqua–ytterbium complex
作者:Rachel S. Dickins、Andrei S. Batsanov、Judith A. K. Howard、David Parker、Horst Puschmann、Stefania Salamano
DOI:10.1039/b311791j
日期:——
A detailed investigation of the nature of the binding of each of the 20 common α-aminoacids and various selected dipeptides to a chiral, diaqua–ytterbium complex in aqueous solution has been carried out. Analysis of the dipolar 1H NMR paramagnetic shifts suggests that the α-aminoacids form a common chelated structure within a nine-coordinate mono-capped square antiprismatic coordination environment
Water-Tolerant and Atom Economical Amide Bond Formation by Metal-Substituted Polyoxometalate Catalysts
作者:Francisco de Azambuja、Tatjana N. Parac-Vogt
DOI:10.1021/acscatal.9b03415
日期:2019.11.1
A simple, safe, and inexpensive amide bond formation directly from nonactivated carboxylicacids and free amines is presented in this work. Readily available Zr(IV)- and Hf(IV)-substituted polyoxometalates (POM) are shown to be catalysts for the amide bond formationreaction under mild conditions, low catalyst loading, and without the use of water scavengers, dry solvents, additives for facilitating