Discovery of Quinazolin-4(3<i>H</i>)-ones as NLRP3 Inflammasome Inhibitors: Computational Design, Metal-Free Synthesis, and in Vitro Biological Evaluation
作者:Mohd Abdullaha、Shabber Mohammed、Mehboob Ali、Ajay Kumar、Ram A. Vishwakarma、Sandip B. Bharate
DOI:10.1021/acs.joc.9b00138
日期:2019.5.3
NLRP3inflammasome is an important therapeutic target for a number of human diseases. Herein, computationally designed series of quinazolin-4(3H)-ones were synthesized using iodine-catalyzed coupling of arylalkynes (or styrenes) with O-aminobenzamides. The key event in this transformation involves the oxidative cleavage of the C–C triple/double bond and the release of formaldehyde. The reaction relies
Electrochemical oxidative synthesis of 2-benzoylquinazolin-4(3<i>H</i>)-one <i>via</i> C(sp<sup>3</sup>)–H amination under metal-free conditions
作者:Yongzhi Hu、Xinhua Ma、Huiqing Hou、Weiming Sun、Shuqing Tu、Mei Wu、Rongkun Lin、Xiuzhi Xu、Fang Ke
DOI:10.1039/d1cy01230d
日期:——
induced C(sp3)–Hamination of 2-aminobenzamides with ketones using TBAI as a catalyst was developed, and provided 2-benzoylquinazolin-4(3H)-onesundermetal-freeconditions. The reaction proceeded using the relatively low-toxicity methanol as the solvent, employed molecular oxygen as the ideal green oxidant in a simple undivided cell, and exhibited high atom economy. The mechanism of this C(sp3)–H amination
Copper-Catalyzed One-Pot Synthesis of Quinazolinones from 2-Nitrobenzaldehydes with Aldehydes: Application toward the Synthesis of Natural Products
作者:Subrata Sahoo、Shantanu Pal
DOI:10.1021/acs.joc.1c02343
日期:2021.12.17
A novel, efficient, and atom-economical approach for the construction of quinazolinones from 2-nitrobenzaldehydes has been unveiled via copper-catalyzed nitrile formation, hydrolysis, and reduction in onepot for the first time. In this reaction, urea is used as a source of nitrogen for nitrile formation, hydrazine hydrate is used for both the reduction of the nitro group and the hydrolysis of nitrile
首次通过铜催化的腈形成、水解和还原在一个锅中揭示了一种从 2-硝基苯甲醛构建喹唑啉酮的新型、高效和原子经济的方法。在该反应中,尿素用作生成腈的氮源,水合肼用于硝基的还原和腈的水解,大气中的氧气用作唯一的氧化剂。该方法描绘了具有良好官能团耐受性的宽底物范围。此外,该方法还用于合成裂殖菌素、色胺菊酯、phaitanthrin-A、phaitanthrin-B和8 H-喹唑啉[4,3 - b ]quinazolin-8-one。
A catalyst-free synthesis of 2-benzoyl-4-quinazolinones is described here. Anthranilamides and a-haloacetophenones were used as the starting reagents. The effects of molar ratio of reactants, catalyst, solvent, base, temperature and time on the reaction were investigated and then the optimal reaction conditions were achieved. All of the substrates examined under the optimized conditions gave high yields. Compared to traditional synthesis method of 2-benzoyl-4-quinazolinones, this method has several advantages, such as no catalyst, cost saving and environmentally benign process.
Iodine-Promoted Oxidative Amidation of Terminal Alkenes - Synthesis of α-Ketoamides, Benzothiazoles, and Quinazolines
作者:Ramesh Deshidi、Shekaraiah Devari、Bhahwal Ali Shah
DOI:10.1002/ejoc.201403547
日期:2015.3
A novel metal-free strategy for oxidative amidation of terminal alkenes by using I2/DMSO for the synthesis of α-ketoamides has been developed. Intriguingly, the use of tert-butylhydroperoxide (TBHP) as co-oxidant can facilitate the synthesis of α-ketoamides at room temperature without any solvent, thereby making it a green protocol. The reaction with primary amines can be easily achieved by using SeO2