Electro-oxidative cyclization: access to quinazolinones <i>via</i> K<sub>2</sub>S<sub>2</sub>O<sub>8</sub> without transition metal catalyst and base
作者:Yongzhi Hu、Huiqing Hou、Ling Yu、Sunying Zhou、Xianghua Wu、Weiming Sun、Fang Ke
DOI:10.1039/d1ra05092c
日期:——
A K2S2O8-promoted oxidative tandem cyclization of primary alcohols with 2-aminobenzamides to synthesize quinazolinones was successfully achieved under undivided electrolytic conditions without a transition metal and base. The key feature of this protocol is the utilization of K2S2O8 as an inexpensive and easy-to-handle radical surrogate that can effectively promote the reaction via a simple procedure
AK 2 S 2 O 8促进了伯醇与2-氨基苯甲酰胺的氧化串联环化以合成喹唑啉酮,在没有过渡金属和碱的不分电解条件下成功实现。该协议的主要特点是利用 K 2 S 2 O 8作为一种廉价且易于处理的自由基替代物,可以通过简单的程序有效地促进反应,从而通过形成氮杂环在恒定电流下以一锅法在室温下直接氧化环化。由于使用了连续流动的电化学装置,这种绿色、温和、实用的电合成具有高效率和优异的官能团耐受性,并且易于放大。
Electrochemically induced synthesis of quinazolinones <i>via</i> cathode hydration of <i>o</i>-aminobenzonitriles in aqueous solutions
作者:Li Yang、Huiqing Hou、Lan Li、Jin Wang、Sunying Zhou、Mei Wu、Fang Ke
DOI:10.1039/d0ob02286a
日期:——
for the synthesis of substituted quinazolinones from simple and readily available o-aminobenzonitriles and aldehydes in water has been accomplished. I2/base and water play an unprecedented and vital role in the reaction. By electrochemically catalysed hydrolysis of o-aminobenzonitriles, the synthesis of quinazolinones with benzaldehyde was first proposed. The synthetic utility of this method was demonstrated
A highly efficient heterogeneous palladium-catalyzed carbonylative annulation of 2-aminobenzamides with aryl iodides leading to quinazolinones
作者:Shengyong You、Bin Huang、Tao Yan、Mingzhong Cai
DOI:10.1016/j.jorganchem.2018.09.003
日期:2018.11
The first heterogeneous carbonylative annulation of 2-aminobenzamides with aryl iodides was achieved in N,N-dimethylformamide (DMF) at 120 °C under 10 bar of carbon monoxide by using an MCM-41-immobilized bidentatephosphine palladium(II) complex [MCM-41-2P-Pd(OAc)2] as catalyst and 1,8-diazabicycloundec-7-ene (DBU) as base, yielding a wide variety of quinazolinone derivatives in good to excellent
Structure-based design, synthesis and crystallization of 2-arylquinazolines as lipid pocket ligands of p38α MAPK
作者:Mike Bührmann、Bianca M. Wiedemann、Matthias P. Müller、Julia Hardick、Maria Ecke、Daniel Rauh
DOI:10.1371/journal.pone.0184627
日期:——
disrupting protein-protein interactions. Small organic molecules that target these less conserved regions might serve as tools for chemical biology research and to probe alternative strategies in targeting protein kinases in disease settings. Here, we present the structure-based design and synthesis of a focused library of 2-arylquinazoline derivatives to target the lipophilic C-terminal binding pocket
Non-metal-mediated <i>N</i>-oxyl radical (TEMPO)-induced acceptorless dehydrogenation of N-heterocycles <i>via</i> electrocatalysis
作者:Huiqing Hou、Xinhua Ma、Yaling Ye、Mei Wu、Sunjie Shi、Wenhe Zheng、Mei Lin、Weiming Sun、Fang Ke
DOI:10.1039/d1ra08919f
日期:——
of N-heterocycles with metal-free catalysts holds the key to difficulties in green and sustainable chemistry. Herein, an N-oxyl radical (TEMPO) acting as an oxidant in combination with electrochemistry is used as a synthesis system under neutral conditions to produce N-heterocycles such as benzimidazole and quinazolinone. The key feature of this protocol is the utilization of the TEMPO system as an
使用无金属催化剂直接催化 N-杂环无受体脱氢的方案的开发是解决绿色和可持续化学难题的关键。本文中, N-氧基自由基(TEMPO)作为氧化剂与电化学相结合,在中性条件下用作合成体系,生产N-杂环化合物,例如苯并咪唑和喹唑啉酮。该协议的主要特点是利用 TEMPO 系统作为一种廉价且易于处理的自由基替代物,可以有效促进脱氢反应。机理研究还表明氧化性TEMPO氧化还原催化循环参与2,3-二氢杂芳烃的脱氢。