一种高效,无催化剂的单锅三组分方法,用于合成新型和富氮的二氢吡啶并[2,3- d ]嘧啶和带有喹啉的二氢-1H-吡唑并[3,4- b ]吡啶提供了药效团片段。在微波辐射下,甲酰喹啉衍生物,伯杂环胺和环状1,3-二酮的三组分混合物在DMF中进行反应。有趣的是,当将常规的回流加热用于起始5-氨基-1-苯基吡唑时,获得了相应的芳香化吡唑并吡啶作为主要产物。单晶X射线分析清楚地证实了二氢和芳构化产物的结构。
Catalyst-free assembly of giant tris(heteroaryl)methanes: synthesis of novel pharmacophoric triads and model sterically crowded tris(heteroaryl/aryl)methyl cation salts
作者:Rodrigo Abonia、Luisa F Gutiérrez、Braulio Insuasty、Jairo Quiroga、Kenneth K Laali、Chunqing Zhao、Gabriela L Borosky、Samantha M Horwitz、Scott D Bunge
DOI:10.3762/bjoc.15.60
日期:——
A series of giant tris(heteroaryl)methanes are easily assembled by one-pot three-componentsynthesis by simple reflux in ethanol without catalyst or additives. Diversely substituted indoles (Ar1) react with quinolinealdehydes, quinolone aldehydes, chromone aldehydes, and fluorene aldehydes (Ar2CHO) and coumarins (Ar3) in 1:1:1 ratio to form the corresponding tris(heteroaryl)methanes (Ar1Ar2Ar3)CH
通过在乙醇中简单回流,无需催化剂或添加剂,通过一锅三组分合成可以轻松地组装一系列巨型三(杂芳基)甲烷。多取代吲哚(Ar 1 )与喹啉醛、喹诺酮醛、色酮醛、芴醛(Ar 2 CHO)和香豆素(Ar 3 )以1:1:1的比例反应生成相应的三(杂芳基)甲烷(Ar 1 Ar 2 Ar 3 )CH 以及 (Ar 1 Ar 1 Ar 2 )CH 三元组。通过取代吲哚与 Ar 2 CHO 的偶联,还合成了一系列新的 2:1 三联体。偶联反应也可以在水中(约 80 °C)进行,但化学选择性优于 (Ar 1 Ar 1 Ar 2 )CH 而不是 (Ar 1 Ar 2 Ar 3 )CH。通过X射线分析证实了代表性(Ar 1 Ar 2 Ar 3 )CH三元组的分子结构。通过与DDQ/HPF 6反应生成模型三(杂芳基/芳基)甲基鎓盐,并通过NMR、DFT和GIAO-DFT进行研究。
Antimicrobial Activity of Quinoline-Based Hydroxyimidazolium Hybrids
a MIC value of 2 µg/mL (5 µM). In addition, hybrid 7h also demonstrated inhibition of Staphylococcus aureus at 20 µg/mL (47 µM). Hybrids 7a and 7b were the most potent against Mycobacterium tuberculosis H37Rv with MIC values of 20 and 10 µg/mL (46 and 24 µM), respectively. The 7b hybrid demonstrated high selectivity in killing S. aureus and M. tuberculosis H37Rv in comparison with mammalian cells (SI
Novel quinoline–imidazolium adducts via the reaction of 2-oxoquinoline-3-carbaldehyde and quinoline-3-carbaldehydes with 1-butyl-3-methylimidazolium chloride [BMIM][Cl]
作者:Kenneth K. Laali、Daniel Insuasty、Rodrigo Abonia、Braulio Insuasty、Scott D. Bunge
DOI:10.1016/j.tetlet.2014.05.094
日期:2014.7
A library of hydroxyquinolin-3-ylmethylimidazolium adducts were prepared in high yields from the reaction of [BMIM][Cl] with various substituted quinoline-3-carbaldehydes and 2-oxoquinoline-3-carbaldehydes under mild conditions by using sodium acetate in MeCN under ultrasound irradiation. The use of sodium acetate and imidazolium chloride was crucial for the success of these C C bond forming reactions. Attempted coupling with thiazolium bromide led instead to quinoline-3-carboxylic acid. (C) 2014 Elsevier Ltd. All rights reserved.