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.
Reaction behaviour of arylamines with nitroalkenes in the presence of bismuth(<scp>iii</scp>) triflate: an easy access to 2,3-dialkylquinolines
作者:Saghir Ali、Radhakrishna Gattu、Varun Singh、Santa Mondal、Abu T. Khan、Gurudutt Dubey、P. V. Bharatam
DOI:10.1039/c9ob02214g
日期:——
We report the reaction behaviour of arylamines with nitroalkenes in the presence of bismuth(iii) triflate (10 mol%) and diacetoxyiodobenzene (10 mol%). We obtained 2,3-dialkylquinoline derivatives instead of the expected 3-alkylindole derivatives. The present reaction is an alternative approach for the synthesis of 2,3-dialkylquinoline derivatives under milder conditions. Furthermore, we establish
A variety of aminoarenes react with aliphaticaldehydes in the presence of a catalytic amount of a rhodium complex and an excess amount of the corresponding nitroarenes at 180 °C to give 2-alkyl- and 2,3-dialkyl-substituted quinolines in excellent yields. Among the rhodium complexes examined, [Rh(norbornadiene)Cl]2 exhibits the highest activity as a catalyst. Thus, 2-methyl-, 2-ethyl-3-methyl-, 2-propyl-3-ethyl-
在催化量的铑配合物和过量相应硝基芳烃的存在下,多种氨基芳烃在 180 °C 下与脂肪醛反应,以极好的收率得到 2-烷基和 2,3-二烷基取代的喹啉。在所检测的铑配合物中,[Rh(降冰片二烯)Cl]2 作为催化剂表现出最高的活性。因此,2-甲基-、2-乙基-3-甲基-、2-丙基-3-乙基-和2-丁基-3-丙基喹啉衍生物很容易从氨基芳烃和乙醛、丙醛、丁醛和戊醛中获得分别。
Synthesis of 2,3-disubstituted quinolines from in situ generated imines and its enamine tautomer under radical cation induced conditions
作者:Xiaodong Jia、Fangfang Peng、Chang Qing、Congde Huo、Yaxin Wang、Xicun Wang
DOI:10.1016/j.tetlet.2013.07.014
日期:2013.9
A tandem cyclization/aromatization of anilines and aldehydes was achieved under catalytic radicalcation salt induced conditions, producing a series of 2,3-disubstituted quinolines in good yields. In this reaction, the in situ generated imine tautomerizes to enamine, which acts as a dienophile to participate in the tandem cyclization, and further elimination of the anilino group triggers the aromatization