Design and bio-evaluation of indole derivatives as potent Kv1.5 inhibitors
摘要:
Atrial fibrillation (AF) is one of the common arrhythmias that threaten human health. Kv1.5 potassium channel is reported as an efficacious and safe target for the treatment of AF. In this paper, we designed and synthesized three series of compounds through modifying the lead compound RH01617 that was screened out by the pharmacophore model we reported earlier. All of the compounds were evaluated by the whole-patch lamp technology and most of them possessed potent inhibitory activities against Kv1.5. Compounds IIIi and IIIl were evaluated for the target selectivity as well as the pharmacodynamic effects in an isolated rat model. Due to the promising pharmacological behavior, compound IIIl deserves further pharmacodynamic and pharmacokinetic evaluations. (C) 2013 Elsevier Ltd. All rights reserved.
A butyl acetate solution of bisphenol S (BPS) was proved to be able to replace hazardous halogenated solvents in the transformation of indoles. Measurement with Kamlet–Taft solvatochromic parameters disclosed that the polarity of the BPS-containing butyl acetate was enhanced greatly. The protocol not only conferred a convenient way to minimize the use of halogenated solvents in the synthesis of indole
A general method for the synthesis of indoles bearing a variety of substituents at the β-position, and its application to the synthesis of l-tryptophan
A general synthetic method of β-substituted indoles such as indoleacetic acid, tryptamine and L-tryptophan has been exploited utilizing α-methoxylated amides, lactams, a carbamate, and sulfonamides, easily obtainable by an electrochemical method, as key intermediates.
The activation potentials of the p-toluenesulfonyl and benzoyl groups as determined by cyclic voltammetry when they are linked to indole or imidazole are less negative than when these groups are linked to aliphatic amines. This makes them most suitable for side-chainprotection of tryptophan and histidine, as it allows mild selective cleavage not only by controlled-potential electrolysis but also by
Copper‐Catalyzed Chemoselective Divergent Carbene Insertion into the N−H bonds of Tryptamines
作者:Dharmendra Kumar、Malleswara Rao Kuram
DOI:10.1002/adsc.202300893
日期:2023.11.21
synthesis. Herein, we have developed a chemoselective copper-catalyzed carbene insertion protocol onto N−H bonds of tryptamine derivatives. Divergent insertion products are obtained by varying the nucleophilicity of the aliphatic NH of tryptamine with electron-donating or electron-withdrawing groups. The reaction provided N−H insertion products with broad substrate scope in good yields.
Ca(II)-Catalyzed Cascade Reaction of Tryptamines with Propargylic Alcohols: Temperature-Driven Ring Opening and Closing via the Allene Migration Pathway for the Synthesis of Pyrrolo[1,2-<i>a</i>]indoles
作者:Ashok Kale、Su Jeong Kwon、Joohan Lee、Jae Kyun Lee、Kyeong Lee
DOI:10.1021/acs.orglett.3c04357
日期:2024.2.16
temperature-dependent cascade of reactions between tryptamines and propargylicalcohols was developed to achieve selective formation of pyrroloindoline and pyrrolo[1,2-a]indole heterocycles by Ca(II) catalysis. The cascade consists of electrophilic addition of allene at the C3 carbon of indole followed by intramolecular cyclization at 60 °C to yield pyrroloindolines. Furthermore, simultaneous 1,2-allene
开发了色胺和炔丙醇之间的温度依赖性级联反应,以通过 Ca(II) 催化选择性形成吡咯并吲哚啉和吡咯并[1,2- a ]吲哚杂环。该级联包括在吲哚的 C3 碳上进行丙二烯的亲电加成,然后在 60 °C 下进行分子内环化,生成吡咯并吲哚啉。此外,同时进行1,2-丙二烯迁移和吡咯烷开环,然后在回流温度下通过C-N键形成进行分子内环化,以获得吡咯并[1,2- a ]吲哚支架。该方案的优点是底物范围广泛、反应过程干净、可扩展性以及良好至优异的产率。