In the search for new anticancer drugs. XXIV: Synthesis and anticancer activity of amino acids and dipeptides containing the 2-chloroethyl- and [N′-(2-chloroethyl)-N′-nitroso]-aminocarbonyl groups
作者:George Sosnovsky、Indra Prakash、Nuti Uma Maheswara Rao
DOI:10.1002/jps.2600820102
日期:1993.1
45, 47, and 61) dipeptide derivatives composed of phenylglycine, phenylalanine, homophenylalanine, and valine and containing a 2-chloroethylamino group at the C-terminus and an N'-(2-chloroethyl)-N'-nitroso-aminocarbonyl group at the N-terminus of the dipeptides were prepared. The dipeptide derivatives (42-47, 60, and 61) were first evaluated in vivo for their anticanceractivities against the murine
Design and Synthesis of New Potent <i>C</i><sub>2</sub>-Symmetric HIV-1 Protease Inhibitors. Use of <scp>l</scp>-Mannaric Acid as a Peptidomimetic Scaffold
C2-symmetric HIV-1proteaseinhibitors has been undertaken. L-Mannaric acid (6) was bis-O-benzylated at C-2 and C-5 and subsequently coupled with amino acids and amines to give C2-symmetric products based on C-terminal duplication. Potent HIV proteaseinhibitors, 28 Ki = 0.4 nM and 43 Ki = 0.2 nM, have been discovered, and two synthetic methodologies have been developed, one whereby these inhibitors can be
已经进行了使用衍生的碳水化合物作为C2对称HIV-1蛋白酶抑制剂的研究。在C-2和C-5处对L-甘露酸(6)进行双-O-苄基化,然后与氨基酸和胺偶联,基于C端重复生成C2对称产物。已经发现了有效的HIV蛋白酶抑制剂28 Ki = 0.4 nM和43 Ki = 0.2 nM,并且已经开发出两种合成方法,其中一种可以通过仅三个化学步骤由市售材料制备这些抑制剂。在抑制剂中将-COOMe换成-CONHMe时,观察到效价从IC50 = 5000 nM(23)到IC50 = 15 nM(28)显着增加,导致两者之间净增加一个氢键相互作用-NH-基团和HIV蛋白酶主链(Gly 48/148)。
Synthesis and Evaluation of Pseudopeptidic Fluorescence pH Probes for Acidic Cellular Organelles: In Vivo Monitoring of Bacterial Phagocytosis by Multiparametric Flow Cytometry
作者:M. Isabel Burguete、Francisco Galindo、M. Angeles Izquierdo、José-Enrique O'Connor、Guadalupe Herrera、Santiago V. Luis、Laura Vigara
DOI:10.1002/ejoc.201000854
日期:2010.11
applications of this family of probes, macrocyclic pseudopeptide 2 was used to monitor the phagocytosis of a culture of GFP-labelled bacteria by human monocytic cells U937 using flowcytometry as the analytical tool. It was found that the occurrence of bacterial killing was concomitant with the production of reactive oxygen species and a drop in pH, the latter monitored indirectly by macrocyclic sensor
合成了一类新的荧光蒽 pH 探针,并对其进行了化学表征,并通过稳态和时间分辨荧光光谱研究了它们的光物理特性。已经在溶液中研究了这些化合物监测 pH 值的能力,并且发现分子 1-12 可以充当 4.6 和 6.5 范围内 pH 值的荧光传感器。该范围对应于描述了有限数量探针的细胞中酸性细胞器的 pH 值(pH 4.5-6.0)。每个传感器的酸碱行为略有不同,具体取决于分子中存在的胺附近的取代基的性质。Thus, the pK a of this family of compounds can be finely tuned by the appropriate selection of the synthetic building blocks at the design stage. 为了测试该探针家族的潜在诊断应用,使用流式细胞术作为分析工具,使用大环假肽 2 来监测人类单核细胞 U937
Copper(ii) complexes of bis(amino amide) ligands: effect of changes in the amino acid residue
作者:Inés Martí、Armando Ferrer、Jorge Escorihuela、M. Isabel Burguete、Santiago V. Luis
DOI:10.1039/c2dt12459a
日期:——
A family of ligands derived from bis(amino amides) containing aliphatic spacers has been prepared, and their protonation and stability constants for the formation of Cu2+ complexes have been determined potentiometrically. Important differences are associated to both the length of the aliphatic spacer and the nature of the side chains derived from the aminoacid. In general, ligands containing aliphatic
The present invention has as its object providing phenethylamine derivatives that typically function as a motilin receptor antagonist and which are useful as medicines. The invention provides compounds represented by the general formula (1):
(wherein A is typically an amino acid residue, R1 is typically R6—CO—, R2 is typically a hydrogen atom, R3 is typically —CO—R7, R4 is typically an alkyl group, R5 is typically a hydroxyl group, R6 is typically an alkyl group, and R7 is typically an amino group).