Abstract
A metal, solvent and oxidant free approach has been developed for the synthesis of quinazolin-4(3H)-ones in a concise and convergent fashion under microwave irradiation. Using the same metal free catalyst 2,3-dihydroquinazolin-4(1H)-ones were also synthesized in water as green and sustainable solvent. Starting from 2-aminobenzonitriles and carbonyls, the desired products were isolated in good to excellent yields. These protocols provided a simplistic and an expeditious approach for the assembly of diverse structural quinazolinones.
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