New selective nonsteroidal aromatase inhibitors: Synthesis and inhibitory activity of 2,3 or 5-(α-azolylbenzyl)-1H-indoles
摘要:
Six azolyl substituted indoles were synthesized and tested for their activity to inhibit two P450 enzymes: P450 arom and P450 17 alpha. It was observed that the introduction of alpha-imidazolylbenzyl chain at carbon 3 or 5 on indole nucleus led to very active molecules. Compounds 22, 23 and especially 33 demonstrate very high potential against P450 arom. Under our assay conditions of high substrate concentration the IC50 are 0.057, 0.0785 and 0.041 mu M,respectively. These compounds are moderate inhibitors against P450 17 alpha. (C) 1999 Elsevier Science Ltd. All rights reserved.
Palladium-catalyzed Suzuki–Miyaura coupling of amides by carbon–nitrogen cleavage: general strategy for amide N–C bond activation
作者:Guangrong Meng、Michal Szostak
DOI:10.1039/c6ob00084c
日期:——
limitations are presented in the synthesis of >60 functionalized ketones. Mechanistic studies provide insight into the catalytic cycle of the cross-coupling, including the first experimental evidence for Pd insertion into the amide N–C bond. The synthetic utility is showcased by a gram-scale cross-coupling and cross-coupling at room temperature. Most importantly, this process provides a blueprint for the
balanced activity for both subtypes. Herein we report the discovery, synthesis, and optimization of a new series of α‐ethoxyphenylpropionic acid bearing 5‐ or 6‐substituted indoles. The incorporation of oxime ethers on the carbonyl portion of the benzoyl group can bring the PPARα/γ potency ratio equal to or slightly greater than one, as is the case for compounds 20 c and 21 a. Compound 20 c shows high efficacy
同时激活过氧化物酶体增殖物激活受体(PPAR)亚型α和γ的化合物具有在单个药物活性分子中有效治疗血脂异常和2型糖尿病(T2D)的潜力。选择性添加PPARα活性有望克服选择性PPARγ激动剂经常观察到的副作用,例如水肿和体重增加,从而导致两种亚型的双重PPARα/γ激动剂均具有平衡的活性。本文中,我们报告发现,合成和优化了一系列新的带有5或6个取代的吲哚的α-乙氧基苯基丙酸。在苯甲酰基的羰基部分上掺入肟醚可以使PPARα/γ效力比等于或略大于1,就像化合物20c和21a的情况一样。化合物20c的表现出高效力在OB / OB T2D和血脂异常,类似于罗格列酮和替格列扎的小鼠模型,但与体重增加一个显著增加。与此相反,化合物21,作为双PPARα/γ活化剂小于有力20c中,显示了一个有趣的药理学特性,因为它引起在相对于体重的参考化合物的降低。
A Simple, Efficient, and Recyclable Phosphine-Free Catalytic System for Carbonylative Suzuki Coupling Reaction of Aryl and Heteroaryl Iodides
The carbonylative Suzuki cross-coupling reaction of arylboronic acid with aryl and heteroaryl iodides using polymer supported palladium-N-heterocyclic carbene complex (PS-Pd-NHC) as an efficient heterogeneous, recyclable catalyst is described. The developed catalyticsystem is found to be effective for the carbonylative coupling reaction of aryl, heteroaryl, and bicyclic heteroaryl iodides (5-iodoindole
Pd/C: An Efficient, Heterogeneous and Reusable Catalyst for Phosphane-Free Carbonylative Suzuki Coupling Reactions of Aryl and Heteroaryl Iodides
作者:Mayur V. Khedkar、Pawan J. Tambade、Ziyauddin S. Qureshi、Bhalchandra M. Bhanage
DOI:10.1002/ejoc.201001134
日期:2010.12
The carbonylativeSuzukicouplingreaction of aryl boronic acid with different aryl and heteroaryliodides was carried out to synthesize various unsymmetrical biaryl ketones by using Pd/C as an efficient, heterogeneous and reusable catalyst. The catalyst exhibits remarkable activity, and its reusability was tested up to four consecutive cycles. The reaction is applicable for various aryl and heteroaryl
C5-alkylated indolines/indoles has been developed. The strategy is composed of Zn(OTf)2-catalyzed Friedel–Crafts alkylation of N-benzylindolines with nitroolefins, and a series of diverse indolines was first obtained in up to 99% yield. This reaction provides a direct and practical route to a variety of the C5-alkylated indolines which were also utilized for accessing corresponding indoles. Indoline derivatives