Manganese(I)-Catalyzed Transfer Hydrogenation and Acceptorless Dehydrogenative Condensation: Promotional Influence of the Uncoordinated N-Heterocycle
作者:Chong Zhang、Bowen Hu、Dafa Chen、Haiping Xia
DOI:10.1021/acs.organomet.9b00475
日期:2019.8.26
showed the highest activity. The reactions proceeded well with 0.5 mol % of catalyst loading and 20 mol % of t-BuOK at 85 °C for 24 h. Furthermore, 3 was also used as a catalyst for the synthesis of primary alcohols via transfer hydrogenation of aldehydes and the synthesis of 1,2-disubstituted benzimidazoles and quinolines via acceptorless dehydrogenative condensations.
四种二齿锰(I)配合物[(C 5 H 4 N-C 5 H 3 N-OH)Mn(CO)3 Br](1),[(C 9 H 6 N-C 5 H 3 N-OH)Mn(CO )3 Br](2),[(C 8 H 5 N 2 -C 5 H 3 N-OH)Mn(CO)3 Br](3)和[(C 8 H 5 N 2 -C 5 H 3 N-OCH 3)Mn(CO)3Br](4)被合成。测试了这些配合物作为酮转移氢化的催化剂,其中3种显示出最高的活性。在85℃下,在0.5mol%的催化剂负载量和20mol%的t- BuOK下,反应进行得很好,持续了24小时。此外,3还用作催化剂,用于通过醛的转移氢化合成伯醇,以及通过无受体的脱氢缩合反应合成1,2-二取代的苯并咪唑和喹啉。
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.
A copper(II)-catalyzed protocol for modified Friedländer quinoline synthesis
作者:Chan Sik Cho、Wen Xiu Ren、Sang Chul Shim
DOI:10.1016/j.tetlet.2006.07.067
日期:2006.9
2-Aminobenzylalcohol reacts with an array of ketones in dioxane at 100 °C in the presence of a catalytic amount of CuCl2 along with KOH under O2 atmosphere to afford the corresponding quinolines in good yields. 2-Aminobenzylalcohol is also oxidatively coupled and cyclized with various aldehydes by step-by-step procedure, an initial treatment of 2-aminobenzylalcohol in the presence of CuCl2 and KOH
Synthesis of 2-Substituted Quinolines from 2-Aminostyryl Ketones Using Iodide as a Catalyst
作者:So Young Lee、Jiye Jeon、Cheol-Hong Cheon
DOI:10.1021/acs.joc.8b00552
日期:2018.5.4
A new protocol for the synthesis of 2-substituted quinolinesfrom 2-aminostyryl ketones has been developed using iodide as a nucleophilic catalyst. Conjugate addition of iodide to 2-aminostyryl ketones yielded the corresponding β-iodoketones, which could have a conformation where the amino and carbonyl groups are proximal through free rotation about the Cα–Cβ single bond. Subsequent condensation between
On-Water Synthesis of 2-Substituted Quinolines from 2-Aminochalcones Using Benzylamine as the Nucleophilic Catalyst
作者:So Young Lee、Cheol-Hong Cheon
DOI:10.1021/acs.joc.8b01675
日期:2018.11.2
On-water synthesis of 2-substituted quinolines from 2-aminochalcone derivatives was developed using benzylamine as the nucleophilic catalyst. Various 2-aminochalcones could be applied to this protocol, and the desired 2-substituted quinoline products were isolated in excellent yields by simple filtration. Furthermore, we elucidated the role of benzylamine in this transformation and provided the detailed