Biological activities and quantitative structure-activity relationships of spiro[imidazolidine-4,4'(1'H)-quinazoline]-2,2',5(3'H)-triones as aldose reductase inhibitors
摘要:
A series of spiro[imidazolidine-4,4'(1'H)-quinazoline]-2,2',5(3'H)-triones were prepared and tested for aldose reductase inhibitory activity. The 6'-halogenated derivatives were found to be highly potent in vitro inhibitors of male rabbit lens aldose reductase and in vivo inhibitors of polyol accumulation in the sciatic nerves of galactosemic rats. Of these, (4R)-6'-chloro-3'-methylspiro[imidazolidine-4,4'(1'H)-quinazoline]-2,2',5(3'H)-trione (67) showed the most potent in vitro and in vivo activities. An oral dose of 3 g/kg of compound 67 caused neither death nor behavioral abnormality in the preliminary acute toxicity study using mice and rats. Compound 67 was selected as a candidate for further evaluation. The quantitative structure-activity relationships in this series are also discussed.
甲spiroindolinone,(1小号,3 - [R,3α [R,6α小号)-1-苄基-6'-氯-5-(4-氟苯基)-7'-甲基螺[1,2,3一个,6一个-tetrahydropyrrolo [3,4- c ]吡咯-3,3'-1 H-吲哚] -2',4,6-三酮以前被报道可增强氟康唑对白色念珠菌的抗真菌作用。合成了该化合物的非对映异构体以及各种类似物。已显示许多化合物可增强氟康唑对白色念珠菌的抗真菌作用。s,有些具有精美的效能。发现一种螺环哌嗪衍生物,我们称为synazo-1,可增强氟康唑对敏感白念珠菌的EC 50值为300 p M的作用,对某些抗性菌株的作用低至2 n M。Synazo-1与氟康唑具有真正的协同作用,在测试菌株中FIC指数低于0.5。与抗真菌协同作用所需的浓度相比,Synazo-1在哺乳动物细胞中的毒性较低。
Counter-Current chromatography separation of isatin derivatives using the sandmeyer methodology
作者:Márcia R. Almeida、Gilda G. Leitão、Bárbara V. Silva、Jussara P. Barbosa、Angelo C. Pinto
DOI:10.1590/s0103-50532010000400025
日期:——
method, using high-speed counter-current chromatography (HSCCC) technique, was developed for the separation of isomericisatin derivatives, prepared following the Sandmeyer route. The biphasic solvent system composed of hexane:ethyl acetate:ethanol:water 1:0.5:0.5:1 (v/v/v/v) was used for all separations.
开发了一种快速高效的方法,使用高速逆流色谱(HSCCC)技术分离按照Sandmeyer路线制备的同分异构的Isatin衍生物。所有分离均使用由己烷:乙酸乙酯:乙醇:水1:0.5:0.5:1(v / v / v / v)组成的双相溶剂系统。
The melosatins—a novel class of alkaloids from melochia tomentosa
Details of the isolation of malosatin A, B, and C and the synthesis of melosatin A are presented. Melosatin C has been characterized as 7-methoxy-4-(5-phenylpentyl)isatin. Several Me and OMe substituted isatins are synthesized as models and UV and mass spectra of the series are discussed.
Extended Structure–Activity Relationship and Pharmacokinetic Investigation of (4-Quinolinoyl)glycyl-2-cyanopyrrolidine Inhibitors of Fibroblast Activation Protein (FAP)
作者:Koen Jansen、Leen Heirbaut、Robert Verkerk、Jonathan D. Cheng、Jurgen Joossens、Paul Cos、Louis Maes、Anne-Marie Lambeir、Ingrid De Meester、Koen Augustyns、Pieter Van der Veken
DOI:10.1021/jm500031w
日期:2014.4.10
(2S)-cyanoPro scaffold as a possible entry to highly potent and selective FAP inhibitors. In the present study, we explore in detail the structure–activityrelationship around this core scaffold. We report extensively optimized compounds that display low nanomolar inhibitory potency and high selectivity against the related dipeptidylpeptidases (DPPs) DPPIV, DPP9, DPPII, and prolyl oligopeptidase (PREP)