Ruthenium-catalyzed formal alkyl group transfer: Synthesis of quinolines from nitroarenes and alkylammonium halides
作者:Chan Sik Cho、Na Young Lee、Tae-Jeong Kim、Sang Chul Shim
DOI:10.1002/jhet.5570410320
日期:2004.5
Nitroarenes are reductively cyclized with an array of tetraalkylammonium halides and trialkylarnmonium chlorides in the presence of a catalytic amount of a ruthenium catalyst along with tin(II) chloride dihydrate at 180° to afford the corresponding quinolines in moderate to good yields. The addition of tin(II) chloride dihydrate is necessary for the effective formation of quinolines and toluene is
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 reductive cyclization of nitroarenes with trialkylamines leading to quinolines
作者:Chan Sik Cho、Tae Kyung Kim、Bok Tae Kim、Tae-Jeong Kim、Sang Chul Shim
DOI:10.1016/s0022-328x(02)01170-1
日期:2002.5
Nitroarenes react with trialkylamines in the presence of a catalytic amount of a ruthenium catalyst together with tin(II) chloride dihydrate at 180 °C in an aqueousmedium (toluene–H2O) to afford the corresponding quinolines in moderate to good yields. The catalytic pathway seems to be proceeded via a sequence involving initial reduction of nitroarenes to anilines, alkyl group transfer from alkylamines
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.