A novel protocol for the synthesis of 2,3-dihydroquinazolin-4(1H)-ones from 2-aminobenzamides and aldehyde derivatives catalyzed by KOH/DMSO suspension has been developed. The present transition metal free methodology is operationally simple, scalable and varieties of 2,3-dihydroquinazolin-4(1H)-one derivatives were obtained in good to excellent yields in short reaction times.
2,3-Dihydroquinazolin-4(1H)-one derivatives have been synthesized via one-pot reaction of isatoic anhydride, aromatic aldehyde, and ammonium acetate catalyzed by FeCl3/neutral Al2O3 in tert-butanol under reflux conditions. Inexpensive and easily available reagents, convenient work-up procedure, reusable catalyst, and moderate to good yield are the salient features of this protocol.
Gemini basic ionic liquid as bi-functional catalyst for the synthesis of 2,3-dihydroquinazolin-4(1H)-ones at room temperature
作者:Apurba Dutta、Krishnaiah Damarla、Arvind Kumar、Prakash J. Saikia、Diganta Sarma
DOI:10.1016/j.tetlet.2019.151587
日期:2020.3
A cascade synthesis of 2,3-dihydroquinazolin-4(1H)-ones has been developed from 2-aminobenzonitriles and carbonyl analogues using Gemini basic ionicliquid as green catalyst cum solvent at roomtemperature. Both aldehydes and ketones were condensed with 2-aminobenzonitriles affording good to excellent yields of products. Moreover, the ionicliquids can be reused up to 5th cycle without significant
Probing the catalytic activity of highly efficient sulfonic acid fabricated cobalt ferrite magnetic nanoparticles for the clean and scalable synthesis of dihydro, spiro and bis quinazolinones
作者:Priyanka Yadav、Satish K. Awasthi
DOI:10.1039/d1nj01149a
日期:——
An exceptionally productive, rapid, simple, and eco-friendly approach for the synthesis of 2,3-dihydroquinazolin-4(1H)-one has been developed utilizing acidic magnetically retrievable cobalt ferrite nanoparticles (CFNP@SO3H).
Synthesis of 2,3‐dihydroquinazolin‐4(1
<i>H</i>
)‐ones in the presence of Fe
<sub>3</sub>
O
<sub>4</sub>
@nano‐cellulose–OPO
<sub>3</sub>
H as a bio‐based magnetic nanocatalyst
作者:Bi Bi Fatemeh Mirjalili、Zahra Zaghaghi、Aazam Monfared
DOI:10.1002/jccs.201900264
日期:2020.2
In this research, we have used Fe3O4@nano‐cellulose–OPO3H as magneticbio‐basednanocatalyst for the synthesis of 2,3‐dihydroquinazolin‐4(1H)‐ones via condensation of 2‐aminobenzamide and different aldehydes. The major advantages of the present methodology are good yields, ecofriendly catalyst, and easy workup.
在这项研究中,我们使用Fe 3 O 4 @纳米纤维素–OPO 3 H作为磁性生物基纳米催化剂,通过2-氨基苯甲酰胺与不同氨基的缩合反应合成2,3-二氢喹唑啉-4(1 H)-ones。醛。本方法的主要优点是产率高,环境友好的催化剂和后处理容易。