化学多样性的支架代表了药物发现中生物学上重要起点的主要来源。在此,我们报告了使用关键合成策略从硝基芳烃/硝基(杂)芳烃开发此类多样化支架的过程。在一项中试规模的研究中,实现了 10 种不同支架的合成。1,7-菲咯啉、噻唑并[5,4- f ]喹啉、2,3-二氢-1H-吡咯并[2,3- g ]喹啉、吡咯并[3,2- f ]喹啉、1H- [ 1 ,4]恶嗪[3,2- g ]喹啉-2(3 H )-一, [1,2,5]恶二唑并[3,4- h ]喹啉, 7 H-吡啶并[2,3- c ]咔唑, 3 H-吡唑并[4,3- f ]喹啉、吡啶并[3,2- f ]喹喔啉是由硝基杂芳烃在乙醇中通过铁-乙酸处理然后在氧气氛下反应得到的。这个多样化的库符合药物相似性的五规则。这些支架所代表的化学空间的映射揭示了对未被充分代表的化学多样性的重大贡献。这种方法发展的关键是绘制这些支架所覆盖的生物空间,揭示了神经营养和预防
The Transition Metal-catalyzed<i>N</i>-Alkylation and<i>N</i>-Heterocyclization. A Reductive Transformation of Nitroarenes into (Dialkylamino)arenes and 2,3-Dialkyl-substituted Quinolines Using Aliphatic Aldehydes under Carbon Monoxide
The catalytic N-alkylation and N-heterocyclization of nitroarenes occur at 180 °C under a carbon monoxide pressure of 70 atm and in the presence of aldehyde and such transitionmetal complexes as rh...
The Ruthenium Catalyzed Synthesis of Quinoline Derivatives from Nitroarenes and Aliphatic Alcohols
作者:Yoshihisa Watanabe、Yasushi Tsuji、Jun Shida
DOI:10.1246/bcsj.57.435
日期:1984.2
Nitroarenes are reductively converted into quinoline derivatives with aliphatic alcohols in the presence of a catalytic amount of ruthenium compound at 180 °C. Ruthenium(III) chloride is the most effective catalyst. The reaction of nitrobenzene with 1-propanol and 1-butanol gave 2-ethyl-3-methylquinoline and 3-ethyl-2-propylquinoline in 65 and 70% yields respectively. p-Methoxynitrobenzene gave 3-ethyl-6-methoxy-2-propylquinoline in 70% yield with 1-butanol. The reaction appears to include the redox reaction between the nitroarenes and the alcohols, that is, a catalytic hydrogen transfer reaction which generates the aminoarenes and aldehydes. Thus, the alcohol plays roles as both a reductant and an aldehyde precursor.
A convenient and efficient synthesis of substituted quinolines via a simple one-pot reaction of an aniline, an aromatic aldehyde, and an enolizable aliphatic aldehyde in the presence of the iridium catalyst [IrCl2H(cod)]2 under oxygen as an oxidant was developed. The reaction proceeds with Mannich-type imine formation followed by nucleophilic addition to give β-amino aldehydes. Dehydrative cyclization takes place to give dihydroquinoline, which is then dehydrogenated by aerobic oxidation to give 2-aryl-3-alkylquinolines. Dialkylquinolines were obtained by the reaction with anilines and aliphatic aldehydes in good yields.
Facile synthesis of substituted quinolines by iron(<scp>iii</scp>)-catalyzed cascade reaction between anilines, aldehydes and nitroalkanes
作者:Sachinta Mahato、Anindita Mukherjee、Sougata Santra、Grigory V. Zyryanov、Adinath Majee
DOI:10.1039/c9ob01294j
日期:——
A library of substituted quinolines has been synthesized by the reaction of aldehydes, anilines and nitroalkanes using a catalytic amount of Fe(iii) chloride. The reaction is a simple, efficient, one-pot, three-component domino strategy in ambient air which afforded the products in high yields. A probable pathway of the reaction is a sequential aza-Henry reaction/cyclization/denitration. The use of
The synthesis of quinoline derivatives by cyclocondensation of anilines with 1,2‐ethanediol, 1,2‐propanediol, and 1,2‐butanediol in the presence of iron‐containing catalysts was performed for the first time.