A novel approach to producing the quinoline skeleton from 2-aminochalcone was developed. Treatment of benzyloxycarbonyl (Cbz)-protected 2-aminochalcones with BF3 center dot Et2O afforded quinoline derivatives via the deprotection of the Cbz group and isomerization of olefin in a one-pot reaction. The reaction of various 2-aminochalcones proceeded to give the corresponding 2-arylquinoline derivatives in good yields. This method is applicable to the rapid synthesis of dubamine.
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
Metal–Ligand Cooperative Approach To Achieve Dehydrogenative Functionalization of Alcohols to Quinolines and Quinazolin-4(3<i>H</i>)-ones under Mild Aerobic Conditions
作者:Siuli Das、Suman Sinha、Deepannita Samanta、Rakesh Mondal、Gargi Chakraborty、Paula Brandaõ、Nanda D. Paul
DOI:10.1021/acs.joc.9b01343
日期:2019.8.16
under relatively mild reaction conditions (≤90 °C) is reported. Simple and easy-to-prepare air-stable Cu(II) complexes featuring redox-active azo-aromatic scaffolds, 2-arylazo-(1,10-phenanthroline) (L1,2), are used as catalyst. A wide variety of substituted quinolines and quinazolin-4(3H)-ones were synthesized in moderate to good isolated yields via dehydrogenative coupling reactions of various inexpensive
[(PPh<sub>3</sub>)<sub>2</sub>NiCl<sub>2</sub>]-Catalyzed C–N Bond Formation Reaction via Borrowing Hydrogen Strategy: Access to Diverse Secondary Amines and Quinolines
作者:S. N. R. Donthireddy、Vipin K. Pandey、Arnab Rit
DOI:10.1021/acs.joc.1c00510
日期:2021.5.7
mono-N-alkylation of (hetero)aromatic amines, employing alcohols to deliver diverse secondaryamines, including the drug intermediates chloropyramine (5b) and mepyramine (5c), in excellent yields (up to 97%) via the borrowing hydrogen strategy. This method shows a superior activity (TON up to 10000) with a broad substrate scope at a low catalyst loading of 1 mol % and a short reaction time. Further, this strategy
Unsymmetrical triazolyl-naphthyridinyl-pyridine bridged highly active copper complexes supported on reduced graphene oxide and their application in water
作者:Wenkang Hu、Yilin Zhang、Haiyan Zhu、Dongdong Ye、Dawei Wang
DOI:10.1039/c9gc02086a
日期:——
A novel unsymmetrical triazolyl-naphthyridinyl-pyridine ligand was designed and synthesized, and employed in the synthesis of a heterogeneous copper complex on reduced graphene oxide. The resulting copper composite was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and energy dispersive X-ray spectroscopy (EDX). This