One‐Pot Synthesis of Mono‐ and Disubstituted (3<i>H</i>)‐Quinazolin‐4‐ones in Dry Media Under Microwave Irradiation
作者:Minoo Dabiri、Peyman Salehi、Ali A. Mohammadi、Mostafa Baghbanzadeh
DOI:10.1081/scc-200048462
日期:2005.1
supported on silica gel is an efficient medium for one‐pot synthesis of (3H)‐quinazolin‐4‐ones in the absence of solvent undermicrowaveirradiation or classicalheating. The reaction of orthoesters with 2‐aminobenzamides ends up with the formation of monosubstituted (3H)‐quinazolin‐4‐ones. One‐pot synthesis of disubstituted (3H)‐quinazolin‐4‐ones is also achieved by the reaction of isatoic anhydride
installation of phenolic hydroxyl group and extensive exploration of the P1 binding element led to the identification of 5-chloro-N-(5-chloro-2-pyridyl)-3-hydroxy-2-[4-(4-methyl-1,4-diazepan-1-yl)benzoyl]amino}benzamide (33, AS1468240) as a potent factor Xa inhibitor with significant oral anticoagulant activity. We also reported a newly developed Free-Wilson-like fragment recommender system based on the integration
A magnetic ionic liquid supported on γ-Fe2O3 nanocatalyst was synthesized successfully and characterized by Fourier transform infrared spectroscopy, vibrating sample magnetometry, thermogravimetric analysis, differential scanning calorimetry, X-ray diffraction and scanning electron microscopy. The resulting nano-Fe3O4-supported, ionic liquid was an efficient catalyst for preparation of a series of tetracyclic quinazoline compounds by three components reaction of a mixture of isatoic anhydride and amine with ninhydrin in PEG and the desired products were obtained in good to excellent yields. High efficiency, waste-free, mild reaction conditions, effortless magnetic recovery and reusability up to four continuous cycles are the noteworthy features of the currently employed heterogeneous catalytic system.
Metal-free C–H methylation and acetylation of heteroarenes with PEG-400
作者:Vishal Suresh Kudale、Jeh-Jeng Wang
DOI:10.1039/d0gc01183e
日期:——
efficient route for methylation and acetylation of aza-heteroarenes using PEG-400 under O2 and TsOH·H2O for the first time by tuning the reaction conditions using a different set of starting materials. The key features of the current protocol are oxidative C–O and C–C bond scission under metal-free conditions with good functional group tolerance, and a broad substrate scope. The potential applicability
Denitrogenative cleavage of benzotriazoles and benzotriazinones, and selective N-desulfonylation of benzotriazoles by aluminum halides
作者:Bingqian Dong、Yunfeng Liu、Pengtao Yang、Dayong Sang、Juan Tian、Li Li、Sihui Long
DOI:10.1016/j.tetlet.2022.153965
日期:2022.8
Regiospecific denitrogenative cleavage and chemoselective N-desulfonylation of benzotriazoles and benzotriazinones by aluminumhalides are investigated. Products of these transformations are dependent on the N-substituents as well as the aluminumhalides. For benzotriazoles bearing an N-hydroxy or acetyl substituent, denitrogenative cleavage occurs that affords 2′-iodoacetanilides as the products when