Ruthenium-Catalyzed Regioselectiveα-Alkylation of Ketones: The First Alkyl-Group Transfer from Trialkylamines to theα-C Atom of Ketones
摘要:
A new reaction: A ruthenium-catalyzed transfer of an alkyl group from a trialkylamine to the α-carbon atom of a ketone leads in good yields to α-alkylated ketones [Eq. (1)]. The reaction is applicable to a wide range of alkyl(alkyl), alkyl(aryl), and cyclic ketones, and in the case of unsymmetrical ketones it takes place regioselectively at the less hindered α-position.
The Nitrogen Compounds in Petroleum Distillates. XX. Isolation of 2-Methyl-8-ethylquinoline from California Petroleum and Proof of Structure through Degradation and Synthesis
Titania-Supported Iridium Subnanoclusters as an Efficient Heterogeneous Catalyst for Direct Synthesis of Quinolines from Nitroarenes and Aliphatic Alcohols
作者:Lin He、Jian-Qiang Wang、Ya Gong、Yong-Mei Liu、Yong Cao、He-Yong He、Kang-Nian Fan
DOI:10.1002/anie.201104089
日期:2011.10.17
A versatile heterogeneous catalyst consisting of sub‐nanosized iridium clusters deposited on titania (Ir/TiO2‐NCs) promotes the direct tandem synthesis of quinoline derivatives from readily available nitroarenes and aliphaticalcohols under mild and additive‐free conditions (see scheme). The process tolerates the presence of various reactive functional groups and is highly selective.
一种通用的多相催化剂,由沉积在二氧化钛上的亚纳米级铱簇(Ir / TiO 2 -NCs)组成,可促进在温和且无添加剂的条件下,由易得的硝基芳烃和脂肪族醇直接串联合成喹啉衍生物。该方法可耐受各种反应性官能团的存在,并且具有很高的选择性。
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
A new reaction: A ruthenium-catalyzed transfer of an alkyl group from a trialkylamine to the α-carbon atom of a ketone leads in good yields to α-alkylated ketones [Eq. (1)]. The reaction is applicable to a wide range of alkyl(alkyl), alkyl(aryl), and cyclic ketones, and in the case of unsymmetrical ketones it takes place regioselectively at the less hindered α-position.
The Nitrogen Compounds in Petroleum Distillates. XX. Isolation of 2-Methyl-8-ethylquinoline from California Petroleum and Proof of Structure through Degradation and Synthesis