Ligand-Free Pd-Catalyzed and Copper-Assisted C–H Arylation of Quinazolin-4-ones with Aryl Iodides under Microwave Heating
摘要:
A microwave-assisted method for the palladium-catalyzed direct arylation of quinazolin-4-one has been developed under copper-assistance. This method is applicable to a wide range of aryl iodides and substituted (2H)-quinazolin-4-ones. This protocol provides a simple and efficient way to synthesize biologically relevant 2-arylquinazolin-4-one backbones.
The regiospecific C-2–Harylation of N-3-substituted quinazolin-4(3H)-ones with a wide range of aryl or (hetero)arylhalides under microwave irradiation was studied. A ligand-dependent palladium/copper bicatalytic system was developed and allowed direct cross-coupling with a variety of (hetero)arylhalides. This useful and scalable procedure promotes the construction of C(sp2)–C(sp2) bonds from arenes
An efficient synthesis of 2,3-diaryl (3H)-quinazolin-4-ones via imidoyl chlorides
作者:Andrew Kalusa、Nicola Chessum、Keith Jones
DOI:10.1016/j.tetlet.2008.07.091
日期:2008.10
A practical and efficient three step synthetic route to 2,3-diaryl (3H)-quinazolin-4-ones has been developed. The key step involves microwave-assisted condensation of an imidoylchloride with an aryl amine. This methodology affords the products cleanly and in high yields.