2,4-Diarylpyrrolidine-3-carboxylic AcidsPotent ETA Selective Endothelin Receptor Antagonists. 1. Discovery of A-127722
摘要:
We have discovered a novel class of endothelin (ET) receptor antagonists through pharmacophore analysis of the existing non-peptide ET antagonists. On the basis of this analysis, we determined that a pyrrolidine ring might replace the indan ring in SE 209670. The resultant compounds were readily prepared and amenable to extensive SAR studies. Thus a series of N-substituted trans,trans-2-(4-methoxyphenyl)-4-(1,3-benzodioxol-5-yl) pyrrolidine-3-carboxylic acids (8) have been synthesized and evaluated for binding at ET(A) and ET(B) receptors. Compounds with N-acyl and simple N-alkyl substituents had weak activity. Compounds with N-alkyl substituents containing ethers, sulfoxides, or sulfones showed increased activity. Much improved activity resulted from compounds where the N-substituents were acetamides. Compound 17u (A-127722) with the N,N-dibutylacetamide substituent is the best of the series. It has an IC50 = 0.36 nM for inhibition of ET-1 radioligand binding at the ETA(A) receptor, with a 1000-fold selectivity for the ET(A) vs the ET(B) receptor. It is also a potent inhibitor (IC50 = 0.16 nM) of phosphoinositol hydrolysis stimulated by ET-1, and it antagonized the ET-l-induced contraction of the rabbit aorta with a pA(2) = 9.20. The compound has 70% oral bioavailability in rats.
[EN] NOVEL BENZO-1,3-DIOXOLYL- AND BENZOFURANYL SUBSTITUTED PYRROLIDINE DERIVATIVES AS ENDOTHELIN ANTAGONISTS [FR] DERIVES DE PYRROLIDINE A SUBSTITUTION BENZO-1,3-DIOXOLYL ET BENZOFURANYL SERVANT D'ANTAGONISTES DE L'ENDOTHELINE
A compound of the formula (I): ##STR1## or a pharmaceutically acceptable salt thereof is disclosed, as well as processes for and intermediates in the preparation thereof, and a method of antagonizing endothelin.
Synthesis of berberine bromide analogs containing tertiary amides of acetic acid in the 9-O-position
作者:I. V. Nechepurenko、N. I. Komarova、V. G. Vasil’ev、N. F. Salakhutdinov
DOI:10.1007/s10600-013-0461-z
日期:2013.1
9-O-Acetamide analogs of berberine bromide were prepared in 20–87% yields via reaction of the isoquinoline alkaloid berberrubine with tertiary amides of bromoacetic acid. Aminolysis did not occur during reaction of methyl-2-(9-demethoxyberberine bromide-9-yl)hydroxyacetate with secondary amines. The corresponding acid or its ethyl ester was isolated.
violaceoruber, has excellent anti-inflammatory potential. Herein, a biogenetically modeled approach to synthesize violacin A and twenty-five analogues was described, which involved the preparation of aromatic polyketide precursor through Claisen condensation and its spontaneous cyclization. The inhibitory effect on nitric oxide (NO) production of all synthetic molecules was evaluated by lipopolysaccharide
Violacin A 是一种色满酮衍生物,从Streptomyces violaceoruber的发酵液中分离出来,具有出色的抗炎潜力。在此,描述了一种合成紫罗兰 A 和 25 种类似物的生物遗传学建模方法,该方法涉及通过克莱森缩合及其自发环化制备芳香聚酮化合物前体。通过脂多糖 (LPS) 诱导的 Raw264.7 细胞评估对所有合成分子的一氧化氮 (NO) 产生的抑制作用。结果表明,在C-7上引入脂肪胺基团明显提高了violacin A的抗炎作用,并且侧链上的芳香醚代替酮基有利于提高活性。其中,模拟7a和16d被筛选为最有效的抗炎候选药物。分子机制研究表明,7a和16d由于抑制NF-κB信号通路而获得抗炎能力。
[EN] CRYSTALLINE FORM OF ATRASENTAN HYDROCHLORIDE<br/>[FR] FORME CRISTALLINE DE L'HYDROCHLORURE D'ATRASENTAN
申请人:ABBOTT LAB
公开号:WO2006034085A1
公开(公告)日:2006-03-30
Substantially amorphous atrasentan hydrochloride, compositions containing it and methods of treatment of diseases and inhibition of adverse physiological events using it are disclosed.
Amphiphilic molecules linked by an aromatic nucleus were developed that showed high selectivity toward bacteria over mammalian cells, and lowdrugresistance. A promising compound 4g exhibited strong bactericidal activity against a panel of sensitive and resistant bacteria, low toxicity, the ability to reduce cell viability in biofilms, stability in mammalian fluids, rapid killing of pathogens, and