Structure-activity relationships of antimalarial indolo[3,2-c]quinolines [1, 2]
摘要:
Structure-activity relationships have been ascertained and chemical methodology developed for a series of antimalarial 3-chloroindolo[3,2-c]quinoline-5-oxides. The basic side chain as well as the ring N-oxide are critical for antimalarial activity as is a bromine or chlorine in position 3. Substitution at positions 7, 8, 9, 10 is not essential, although the most potent analog in our studies was the 8-nitro compound 4vv.
Formation of 2,3-dihydro-4(1H)-quinolones and related compounds via Fries-type acid-catalysed rearrangement of 1-arylazetidin-2-ones
作者:Shinto Kano、Tsutomu Ebata、Shiroshi Shibuya
DOI:10.1039/p19800002105
日期:——
corresponding 2,3-dihydro-4(1H)-quinolones via acyl migration and N–CO fission. In the case of 1-(3-substituted phenyl)azetidin-2-ones, two positional isomeric products, 5- and 7-substituted 2,3-dihydro-4(1H)-quinolones were obtained. 4-Methyl-, 4-ethoxycarbonyl-, and 4-piperidin-2yl-1-arylazetidin-2-ones and their analogues were also converted into the corresponding 2-substituted 2,3dihydro-4(1H)-quinolones
Synthesis of 2,3-Dihydro-4(1H)-quinolones and the Corresponding 4(1H)-Quinolones via Low-Temperature Fries Rearrangement of N-Arylazetidin-2-ones
作者:Jens Lange、Alex C. Bissember、Martin G. Banwell、Ian A. Cade
DOI:10.1071/ch10465
日期:——
cyclization processes, undergo smooth Fries-rearrangement in triflic acid at 0–18°C to give the isomeric 2,3-dihydro-4(1H)-quinolones (2). Dehydrogenation of the latter compounds using 10% Pd on C in 1.0 M aqueous sodium hydroxide/propan-2-ol mixtures at ca. 82°C provides the corresponding 4(1H)-quinolones (3).
Aerobic Dehydrogenative Aromatization in the Preparation of 4-Aminoquinoline Derivatives by Synergistic Pd/Cu Catalysis
作者:Fei Chen、Huidan Geng、Chun Li、Jianta Wang、Bing Guo、Lei Tang、Yuan-Yong Yang
DOI:10.1021/acs.joc.3c01400
日期:2023.11.17
The 4-aminoquinoline moiety is widely present in various bioactive compounds and marketed drugs, while the preparation of this target structure relies heavily on the amination of 4-chloroquinolines. Herein, an atom and step economic procedure was developed based on an aerobic dehydrogenative aromatization strategy. Unlike the well-known palladium-catalyzed dehydrogenative aromatization of cyclohexanones
4-氨基喹啉部分广泛存在于各种生物活性化合物和市售药物中,而该目标结构的制备很大程度上依赖于4-氯喹啉的胺化。在此,基于有氧脱氢芳构化策略开发了原子和步骤经济程序。与众所周知的钯催化环己酮与胺的脱氢芳构化不同,协同 Pd/Cu 催化对于 2,3-二氢喹啉-4(1 H )-one 类型的底物至关重要。在优化条件下,一系列芳香族/脂肪族胺和2,3-二氢喹啉-4(1H ) -酮偶联,以中等到高收率得到相应的4-氨基喹啉产物,并应用当前的方法还展示了上市药物的制备和后期多样化。
Preparation of 4-hydroxyquinoline compounds
申请人:LILLY CO ELI
公开号:US02558211A1
公开(公告)日:1951-06-26
1-acyl-2,3-dihydro-4(1H)-quinolinone-4-oxime derivative, process for the production thereof, pharmaceutical composition and intermediates