Assembly of Substituted 2-Alkylquinolines by a Sequential Palladium-Catalyzed CN and CC Bond Formation
作者:Yoshio Matsubara、Saori Hirakawa、Yoshihiro Yamaguchi、Zen-ichi Yoshida
DOI:10.1002/anie.201102076
日期:2011.8.8
Diversity: A range of substituted 2‐alkylquinolines can be prepared in a general and efficient synthetic approach that employs mild reaction conditions (see scheme). The synthesis is based on a sequential palladium‐catalyzed CN and CCbondformation, followed by palladium‐catalyzed aromatization, and results in the formation of the desired compounds in one step.
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。
Ruthenium-Catalyzed Synthesis of Quinolines from Anilines and Allylammonium Chlorides in an Aqueous Medium via Amine Exchange Reaction
作者:Chan Sik Cho、Joon Seok Kim、Byoung Ho Oh、Tae-Jeong Kim、Sang Chul Shim、Nam Sik Yoon
DOI:10.1016/s0040-4020(00)00694-3
日期:2000.9
Anilines react with allylammonium chlorides in an aqueous medium (H2O–dioxane) in the presence of a catalytic amount of RuCl2(PPh3)3 together with SnCl2·2H2O to give the corresponding quinolines in moderate to good yields. The existence of SnCl2·2H2O is necessary for the effective formation of quinolines, and a reaction pathway involving amineexchange reaction between anilines and allylammonium chlorides
Ruthenium-Catalyzed synthesis of quinolines from anilines and<i>N</i>-allylic compounds by cascade amine exchange reaction-heteroannulation
作者:Chan Sik Cho、Byoung Ho Oh、Sang Chul Shim、Dae Hee Oh
DOI:10.1002/jhet.5570370549
日期:2000.9
Anilines react with N-allylic compounds such as triallylamine and N,N-diallylaniline in dioxane in the presence of a catalytic amount of ruthenium(III) chloride hydrate and bis(diphenylphosphino)methane and tin(II) chloride dihydrate to afford the corresponding quinolines in high yields. Several other phosphorus ligands are also effective, but bis(diphenylphosphino)methane is the ligand of choice.
Ruthenium-catalyzed synthesis of 2-ethyl-3-methylquinolines from anilines and triallylamine
作者:Chan Sik Cho、Byoung Ho Oh、Sang Chul Shim
DOI:10.1016/s0040-4039(98)02661-6
日期:1999.2
Anilines react with triallylamine in dioxane at 180 °C in the presence of a catalytic amount of ruthenium chloride and triphenylphosphine together with tin(II) chloride dihydrate to afford the corresponding 2-ethyl-3-methylquinolines in good yields.