Ruthenium-catalysed oxidative cyclisation of 2-aminobenzyl alcohol with ketones: modified Friedlaender quinoline synthesis
作者:Chan Sik Cho、Bok Tae Kim、Tae-Jeong Kim、Sang Chul Shim
DOI:10.1039/b109245f
日期:2001.12.19
2-Aminobenzyl alcohol is oxidatively cyclised with an array of ketones in dioxane at 80 °C in the presence of a catalytic amount of a ruthenium catalyst and KOH to afford the corresponding quinolines in high yields.
Catalytic utility of PNN-based Mn<sup>I</sup> pincer complexes in the synthesis of quinolines and transfer hydrogenation of carbonyl derivatives
作者:Manali A. Mohite、Sonu Sheokand、Dipanjan Mondal、Maravanji S. Balakrishna
DOI:10.1039/d4dt00001c
日期:2024.3.19
neutral complex [Mn(CO)2(PNN)Br] (3). Complex 2 on treatment with AgBF4 also yielded a cationic complex [Mn(CO)3(PNN)]BF4 (4). These complexes efficiently promoted the synthesis of quinoline derivatives via acceptor-less dehydrogenative coupling of 2-aminobenzyl alcohol and ketones, with complex 3 showing the highest activity with a very low catalyst loading (0.03 mol%) at 110 °C. Complex 3 (0.5 mol%)
该手稿描述了三唑基吡啶基膦N -((二苯基膦基)甲基)- N -甲基-6-(1-苯基-1 H -1,2,3-三唑-4-基)吡啶的合成-2-胺,[2,6-(PPh 2 )CH 2 N(Me)(C 5 H 3 N)(C 2 HN 3 C 6 H 5 )}] ( 1 )(以下称为 PNN )及其阳离子和中性 Mn I配合物及其催化应用。 1与 Mn(CO) 5 Br 反应得到阳离子配合物 [Mn(CO) 3 (PNN)]Br ( 2 ),该配合物在固态下高度稳定,但在溶液中逐渐失去其中一个 CO 基团,形成中性络合物[Mn(CO) 2 (PNN)Br] ( 3 )。用AgBF 4处理络合物2也产生了阳离子络合物[Mn(CO) 3 (PNN)]BF 4 ( 4 )。这些配合物通过2-氨基苯甲醇和酮的无受体脱氢偶联有效促进了喹啉衍生物的合成,其中配合物3在110℃下以非常低的催化剂负载量(0.03mol%)表现出最高的活性。复合体3