CuO nanoparticles catalyzed simple and efficient synthesis of 2,3-dihydroquinazolin-4(1H)-ones and quinazolin-4(3H)-ones under ultrasound irradiation in aqueous ethanol under ultrasound irradiation in aqueous ethanol
A CuO nanoparticle-catalyzed one-pot process has engineered for the preparation of diverse quinazolinones from the readily available isatoic anhydride, aldehydes and amine or ammonium. For amine substrates the reactions afford 2,3-dihydroquinazolin-4(1H)-ones in aqueous ethanol promoted by ultrasound irradiation. However, the ammonium substrates undergo intramolecular electron transfer and rearrangement
Jacob, Dominic E.; Mathew, Lopez, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2007, vol. 46, # 4, p. 664 - 668
作者:Jacob, Dominic E.、Mathew, Lopez
DOI:——
日期:——
Synthesis of 2,3-Dihydroquinazolin-4(1<i>H</i>)-ones by Three-Component Coupling of Isatoic Anhydride, Amines, and Aldehydes Catalyzed by Magnetic Fe<sub>3</sub>O<sub>4</sub> Nanoparticles in Water
A simple and efficient protocol for one-pot three-component coupling of isatoic anhydride, amines, and aldehydes in water using magnetically recoverable Fe3O4 nanoparticles is reported. This methodology results in the synthesis of a variety of 2,3-dihydroquinazolin-4(1H)-ones in high yields. The catalyst can be recovered and recycled without a significant loss in the catalytic activity.
Kumari, Kumkum; Raghuvanshi; Singh, Krishna Nand, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2012, vol. 51, # 6, p. 860 - 865