Azobenzene coupled chromogenic receptors for the selective detection of copper(II) and its application as a chemosensor kit
摘要:
Azobenzene-based receptors 1-4 as colorimetric sensing materials were synthesized and their sensing properties were examined. In solution, the proposed sensing materials give rise to a large cation-induced hypochromic shift for Cu2+ resulting in a change from red to pale-yellow, whereas no significant color change was observed upon addition of other selected metal ions. The use of the silica gel plate modified with immobilization of receptor 4 to detect Cu2+ was also reported. (c) 2006 Elsevier Ltd. All rights reserved.
A novel chiral lipophilic sulfur-containing macrocyclic ligand 5 with bis-pendant alcohols in the proximity of the coordination center has been synthesized. Its metal ion complexes have been investigated as catalysts for the enantioselective hydrolysis of long chain α-aminoacidesters in aqueous comicellar solution with Brij35. Large rate accelerations (up to 220 times) and moderate enantioselectivities
合成了在配位中心附近具有双侧链醇的新型手性亲脂性含硫大环配体5。已经研究了其金属离子络合物作为催化剂在Brij35水溶液中对长链α-氨基酸酯进行对映选择性水解的方法。已经观察到使用大环5- Cu 2+的大速率加速(高达220倍)和中等对映选择性(高达4.85(k S / k R)),而无环3- Cu 2+表现出较低的反应性和立体选择性。取类似的配体4,缺少羟基会导致速率急剧下降,并且观察到对映选择性反转。在我们的胶束反应条件下,与Cu 2+结合的羟基的pKa值确定为pKa = 7.2。
Synthesis of novel chiral lipophilic pyridyl-containing β-amino alcohol ligands and enantioselective hydrolysis of α-amino acid esters by chiral metallomicelles
Seven novel chiral lipophilic pyridyl-containing β-amino alcohol ligands have been synthesized by coupling of 6-alkoxymethyl-2-chloromethylpyridine 3 with the corresponding chiral β-amino alcohols or l-cysteine. Their metal ion complexes have been investigated as catalysts for the enantioselective hydrolysis of N-protected α-aminoacidesters in aqueous comicellar solution. The results indicate that
通过将6-烷氧基甲基-2-氯甲基吡啶3与相应的手性β-氨基醇或1-半胱氨酸偶联,已经合成了七个新颖的手性亲脂性吡啶基含β-氨基醇配体。已经研究了它们的金属离子配合物作为催化剂,用于在漫画溶液中对N-保护的α-氨基酸酯进行对映选择性水解。结果表明,底物与金属催化剂之间的疏水相互作用,配体的刚度,配体的羟基充当亲酰基化的酰基转移过程以及胶束微环境是影响活性和对映选择性的重要因素。大速率加速度(高达三个数量级)和中等对映选择性(高达7.81(k已经观察到采用4a -Cu 2+的R / k S))。
Inhibition of Human α-Methylacyl CoA Racemase (AMACR): a Target for Prostate Cancer
作者:Andrew J. Carnell、Ralph Kirk、Matthew Smith、Shane McKenna、Lu-Yun Lian、Robert Gibson
DOI:10.1002/cmdc.201300179
日期:2013.8.8
The enzyme α‐methylacyl CoAracemase (AMACR) is involved in the metabolism of branched‐chain fatty acids and has been identified as a promising therapeutic target for prostatecancer. By using the recently available humanAMACR from HEK293 kidney cell cultures, we tested a series of new rationally designed inhibitors to determine the structural requirements in the acyl component. An N‐methylthiocarbamate
α-甲基酰基辅酶A外消旋酶(AMACR)参与支链脂肪酸的代谢,已被确定为前列腺癌的有希望的治疗靶标。通过使用最近从HEK293肾细胞培养物中获得的人AMACR,我们测试了一系列新的合理设计的抑制剂,以确定酰基成分的结构要求。一种N-甲基硫代氨基甲酸酯(K i = 98 n M),旨在模拟拟议的酶结合的烯醇酸酯,被发现是迄今为止报道的最有效的AMACR抑制剂。
[EN] FATTY ACID ACYLATED D-AMINO ACIDS FOR ORAL PEPTIDE DELIVERY<br/>[FR] ACIDES D-AMINÉS ACYLÉS PAR UN ACIDE GRAS POUR L'ADMINISTRATION DE PEPTIDES PAR VOIE ORALE
申请人:NOVO NORDISK AS
公开号:WO2014060447A1
公开(公告)日:2014-04-24
The present invention relates to fatty acid acylated amino acids (FA-Daa's) acting as permeation enhancers for oral delivery of therapeutic macromolecules such as peptides and pharmaceutical compositions comprising such FA-Daa's.
Effects of Different Chain Lengths and Chiral Branched Amino Acids on the Synthesis of Mesoporous Silica
作者:Haitao Liu、Yuxiang Yang、Lu Liu、Hongming Yuan、Cheng Chen、Xiangnong Liu
DOI:10.1166/jnn.2014.8667
日期:2014.7.1
Ordered mesoporoussilica was successfully synthesized by using different chain-length chiral anionic surfactants, N-acylalanine and N-acylvaline as templates, and N-trimethoxy silylpropyl-N, N, N-trimethyl ammonium (TMAPS) as a co-structure-directing agent (CSDA) under weakly acidic conditions. The synthesized products were characterized by X-ray diffraction, scanning electron microscopy, transmission