Electrochemical direct trifluoromethylation of quinolinones was described under metal-free catalysis and oxidant-free conditions. A series of 2-aryl-3-trifluoromethylquinoline-4(1H)-ones were obtained in medium to good yield by using the method. By using butylated hydroxytoluene (BHT) as free radical blocker, adduct of BHT-CF3 was originally captured, which confirmed that the reaction was a free radical
Synthesis and Activity of Substituted 2-Phenylquinolin-4-amines, Antagonists of Immunostimulatory CpG-Oligodeoxynucleotides
作者:Lucjan Strekowski、Martial Say、Maged Henary、Patricia Ruiz、Lori Manzel、Donald E. Macfarlane、Andrzej J. Bojarski
DOI:10.1021/jm020374y
日期:2003.3.1
2-phenylquinolines substituted at the phenyl group and C4 of the quinoline were synthesized and analyzed for inhibition of the immunostimulatory effect of oligodeoxynucleotides with a CpG-motif. The Fujita-Ban variant of the classical Free-Wilson analysis gave a highly significant correlation for a series of 48 relatively small molecules demonstrating that (i) the partial contributions of substituents to biological
Direct Synthesis of 2-Aryl-4-quinolones via Transition-Metal-Free Intramolecular Oxidative C(sp<sup>3</sup>)–H/C(sp<sup>3</sup>)–H Coupling
作者:Wei Hu、Jian-Ping Lin、Li-Rui Song、Ya-Qiu Long
DOI:10.1021/acs.orglett.5b00248
日期:2015.3.6
A novel, metal-free oxidative intramolecular Mannich reaction was developed between secondary amines and unmodified ketones, affording a simple and direct access to a broad range of 2-arylquinolin-4(1H)-ones through C(sp3)–H activation/C(sp3)–C(sp3) bond formation from readily available N-arylmethyl-2-aminophenylketones, using TEMPO as the oxidant and KOtBu as the base.
在仲胺和未改性的酮之间开发了一种新颖的,无金属的氧化性分子内曼尼希反应,可通过C(sp 3)-H活化简单直接地获得广泛的2-芳基喹啉4(1 H)-酮。/ C(sp 3)–C(sp 3)键由易于获得的N-芳基甲基-2-氨基苯基酮形成,使用TEMPO作为氧化剂,KO t Bu作为碱。
Supported palladium-catalyzed carbonylative cyclization of 2-bromonitrobenzenes and alkynes to access quinolin-4(1H)-ones
palladium supported on graphitic carbon nitride (Pd/g-CN) catalyzed carbonylative cyclization of 2-bromonitrobenzenes and alkynes has been developed for the expedite construction of quinolin-4(1)-one scaffolds. By using a low loading heterogeneous palladium catalyst, Mo(CO) as both the CO surrogate and the reductant, and nitroarenes as the nitrogen source, the reaction proceeded well to give a variety
Carbonylative Sonogashira annulation sequence: One-pot synthesis of 4-quinolone and 4H-chromen-4-one derivatives
作者:Prasanjit Ghosh、Aritra Kumar Nandi、Sajal Das
DOI:10.1016/j.tetlet.2018.04.029
日期:2018.5
Carbonylative Sonogashira annulation sequence for one pot synthesis of 4-quinolone and 4H-chromen-4-one has been developed in presence of Pd-NHC catalyst. Substituted 2-iodoaniline and 2-iodophenol independently underwent in the carbonylative Sonogashira annulation reaction with a variety of acetylenes to result in 4-quinolone and flavone derivatives respectively in good to excellent yield. Moreover
在Pd-NHC催化剂的存在下,已经开发了用于一锅合成4-喹诺酮和4 H -chromen-4-one的羰基化Sonogashira环化序列。在羰基化的Sonogashira与多种乙炔的环化反应中,分别进行取代的2-碘苯胺和2-碘苯酚的合成,分别以良好或优异的收率得到4-喹诺酮和黄酮衍生物。而且,该方案不需要有毒的CO气体,高催化剂负载量和任何昂贵的盐/添加剂。本文中,我们首次使用Mo(CO)6作为固体CO源,用于通过羰基化Sonogashira环化反应一锅合成黄酮衍生物。