LiBr‐Catalyzed Simple and Efficient Synthesis of Some Novel Substituted Quinolines via Friedlander Heteroannulation Reaction
作者:M. A. Päsha、K. A. Mahammed、V. P. Jayäshankara
DOI:10.1080/00397910701575871
日期:2007.11
method has been developed for the condensation of o‐aminoaryl ketones with α‐methylene ketones in the presence of catalytic amounts of LiBr to afford the corresponding fused cyclic quinolines in high yield using the Friedlander heteroannulation reaction. The reaction works at ambient temperature to give the products within 1.5–2 h.
Furo-, Pyrano- und Oxepino-chinoline sowie deren Schwefel-Analoga
作者:G. Kempter、P. Zänker、H.-D. Zürner
DOI:10.1002/ardp.19673001005
日期:——
Aus aromatischen o‐Amino‐ketonen und heterocyclischen Ringketonen, die in 3‐ bzw. 4‐Stellung zur Carbonylgruppe Sauerstoff bzw. Schwefel enthalten, werden heterocyclisch b‐kondensierte Chinoline hergestellt.
由芳香族邻氨基酮和杂环酮(其 3 位或 4 位含有氧和硫)到羰基,生成杂环 b-稠合喹啉。
Copper-Catalyzed Reactions of Alkenyl Boronic Esters via Chan–Evans–Lam Coupling/Annulation Cascades: Substrate Selective Synthesis of Dihydroquinazolin-4-ones and Polysubstituted Quinolines
作者:Yuge Li、Zifeng Cao、Zhijun Wang、Liang Xu、Yu Wei
DOI:10.1021/acs.orglett.2c02522
日期:2022.9.16
nucleophiles have been established, providing new approaches for one-pot assembly of azacycles. Following the Chan–Evans–Lam C–N couplings, the cyclization processes occur via divergent pathways based on the utilized substrates, affording hydroamination product dihydroquinazolin-4-ones or aromatization product quinolines. Via this one-pot C–N coupling/annulation cascade, the target substituted azacycles can
Pasha; Jayashankara; Mahammed, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2008, vol. 47, # 7, p. 1160 - 1164
作者:Pasha、Jayashankara、Mahammed
DOI:——
日期:——
Rapid and Efficient Microwave‐Assisted Friedländer Quinoline Synthesis
作者:Helen V. Bailey、Mary F. Mahon、Nigel Vicker、Barry V. L. Potter
DOI:10.1002/open.202000247
日期:2020.11
A microwave‐based methodology facilitates reaction of 2‐aminophenylketones with cyclic ketones to form a quinoline scaffold. Syntheses of amido‐ and amino‐linked 17β‐hydroxysteroid dehydrogenase type 3 inhibitors with a benzophenone‐linked motif were pursued using 2‐aminobenzophenone as building block. Two amido‐linked targets were achieved in modest yield, but when using microwave‐assisted reductive
基于微波的方法促进 2-氨基苯基酮与环酮反应形成喹啉支架。使用 2-氨基二苯甲酮作为结构单元合成具有二苯甲酮连接基序的酰胺和氨基连接的 17β-羟基类固醇脱氢酶 3 型抑制剂。两个酰胺连接的目标以适度的产率实现,但当使用微波辅助还原胺化氨基连接的对应物时,观察到了意想不到的产物。 X 射线晶体学显示其为喹啉衍生物,从而优化了 Friedländer 方法的简单而有效的修改。在有机溶剂中使用试剂和乙酸催化剂,无辅助反应仅进行几天且产率非常低。然而,通过使用纯乙酸作为溶剂和酸催化剂,并在 160 °C 微波照射下,喹啉合成可在 5 分钟内实现,收率优异。这比之前报道的所需的高温或强酸具有优势,尤其是考虑到乙酸的绿色证书,并且使用不同酮的例子说明了适用性。此外,无辅助反应在室温下有效进行,尽管速度慢得多。