Synthesis and evaluation of N1-alkylindole-3-ylalkylammonium compounds as nicotinic acetylcholine receptor ligands
摘要:
In this study thirty-three novel indole derivatives were designed and synthesized based on the structure of deformylflustrabromine B (1), a metabolite isolated from the marine bryozoan Flustra foliacea L. The syntheses were carried out using standard methodologies and in good yields. The molecules were tested for their affinities for the alpha 4 beta 2*, alpha 3 beta 4*, alpha 7* and (alpha 1)(2)beta 1 gamma delta nicotinic acetylcholine receptor (nAChR) sub-types. Binding assays showed that, among these ligands, compound 7c exhibited the highest affinity with K-i = 136.1, 93.9 and 862.4 nM for the alpha 4 beta 2*, alpha 3 beta 4*, and alpha 7* nAChRs subtypes, respectively. These results indicated that the indole core might be a useful scaffold for the development of new potent and selective nAChR ligands. (C) 2012 Elsevier Ltd. All rights reserved.
Selective N-alkylation of indoles with primary alcohols using a Pt/HBEA catalyst
作者:S. M. A. Hakim Siddiki、Kenichi Kon、Ken-ichi Shimizu
DOI:10.1039/c4gc01419g
日期:——
(H+-exchanged BEA zeolite) is found to be an effective and reusable heterogeneous catalyst for regioselective N-alkylation of indoles with primary aliphatic and benzylic alcohols under additive-free conditions driven by the borrowing-hydrogen methodology. Structural and mechanistic studies suggest a cooperative mechanism of the Pt0 site on Pt metal clusters and the Brønsted acid site of the zeolite,
9,10-Bis(N-alkylindole-3-yl-vinyl-2)anthracenes as a new series of alkyl length-dependent piezofluorochromic aggregation-induced emission homologues
作者:Q. K. Sun、W. Liu、S. A. Ying、L. L. Wang、S. F. Xue、W. J. Yang
DOI:10.1039/c5ra12969a
日期:——
AIE active 9,10-bis(N-alkylindole-3-yl-vinyl-2)anthracene homologues (IACn) could be facilely prepared and exhibit alkyl length-dependent piezofluorochromic properties whose spectral shifts increase with the decrease of N-alkyl chain lengths.
An efficient metal‐free oxidative dearomatization reaction of indoles is reported for the synthesis of diverse C2/C3‐quaternary indolinones. The nature of the substituent on the indolenitrogen atom dictates the type of product formed in the reaction.
The application of ultrasound to the n-alkylation of amines using phase transfer catalysis
作者:R.Stephen Davidson、Ali M. Patel、Ali Safdar、David Thornthwaite
DOI:10.1016/s0040-4039(00)94235-7
日期:1983.1
The application of ultrasound to the N-alkylation of a variety of amines by alkyl halides under phasetransfer conditions (polyethylene glycol methyl ether and alkylammonium compounds as catalysts) leads to a decrease in the time required to effect reaction.
Directly Bridging Indoles to 3,3′-Bisindolylmethanes by Using Carboxylic Acids and Hydrosilanes under Mild Conditions
作者:Chang Qiao、Xiao-Fang Liu、Hong-Chen Fu、Hao-Peng Yang、Zhi-Bo Zhang、Liang-Nian He
DOI:10.1002/asia.201800766
日期:2018.9.17
(BIMs) synthesis by reductive alkylation of indoles at the C3 position with carboxylic acids in the presence of hydrosilane was developed for the first time. Instead of aldehydes, more readily available, stable, and easy‐to‐handle carboxylic acids have been employed as alternative alkylating agents. As an efficient organocatalyst, B(C6F5)3 enables the reductive alkylation of various substituted indole
首次开发了一种简单的路易斯酸促进的3,3'-二吲哚基甲烷(BIM)合成方法,该方法是在存在氢硅烷的情况下,通过羧酸在C3位的吲哚还原烷基化来合成3,3'-二吲哚基甲烷(BIM)。代替醛,更容易获得,稳定和易于处理的羧酸已被用作替代烷基化剂。作为有效的有机催化剂,B(C 6 F 5)3使在室温下和在纯净条件下,各种取代的吲哚衍生物与羧酸进行还原性烷基化反应,收率可达98%。这种无金属的策略为将吲哚直接用羧酸直接官能化为BIM提供了另一种方法,该方案允许将羧酸选择性还原为醛,并形成C-C键。