Sulfonic acid functionalized Wang resin (Wang-OSO3H) as polymeric acidic catalyst for the eco-friendly synthesis of 2,3-dihydroquinazolin-4(1H)-ones
作者:A.V. Dhanunjaya Rao、B.P. Vykunteswararao、T. Bhaskarkumar、Nivrutti R. Jogdand、Dipak Kalita、Jaydeep Kumar D. Lilakar、Vidavalur Siddaiah、Paul Douglas Sanasi、Akula Raghunadh
DOI:10.1016/j.tetlet.2015.06.004
日期:2015.8
An efficient and green approach has been developed for the synthesis of 2-substituted 2,3-dihydroquinazolin-4(1H)-ones directly from corresponding substituted aromatic and aliphatic aldehyde and anthranilamide using recyclable polymer supported sulfonic acid catalyst under aqueous conditions. Environmental acceptability, operational simplicity, low cost, excellent functional group compatibility, and
Efficient synthesis of 2,3-dihydroquinazolin-4(1H)-ones catalyzed by titanium silicon oxide nanopowder in aqueous media
作者:Ramamohan Mekala、M. V. Madhubabu、G. Dhanunjaya、Sridhar Regati、K. B. Chandrasekhar、Jayaprakash Sarva
DOI:10.1080/00397911.2016.1254801
日期:2017.1.17
ABSTRACT An efficientsynthesis of 2,3-dihydroquinazolin-4(1H)-one derivatives is accomplished in aqueousmedia by a three-component reaction of isatoic anhydride, primary amines or ammonium acetate, and aldehydes catalyzed by titanium silicon oxide nanopowder. A variety of 2,3-dihydroquinazolin-4(1H)-one derivatives were synthesized using this methodology in good to excellent yields. The catalyst