Combustion Derived Nanocrystalline-ZrO2 and Its Catalytic Activity for Biginelli Condensation under Microwave Irradiation

作     者：Bhojegowd, Madhusudana Reddy M. Siddaramanna, Ashoka Siddappa, Anandakumar B. Thimmanna, Chandrappa G. Pasha, Mohamed A. 

作者机构：Department of Studies in Chemistry Central College Campus Bangalore University Bengaluru-560001 India 

出 版 物：《Chinese Journal of Chemistry》 (中国化学（英文版）)

年 卷 期：2011年第29卷第9期

页      面：1863-1868页

核心收录：

学科分类：081702[工学-化学工艺] 081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：Support from the DST  NSTI Phase-IV  Government of India and New Delhi 

主　　题：nanocrystalline-ZrO2 solution combustion araldehydes ethylaceto acetate nano materials greenchemistry catalysis 3,4-dihydropyrimidinones 

摘      要：Nanocrystalline zirconium（IV） oxide （nc-ZrO2） possessing high surface area was synthesized by a low tem- perature eco-friendly solution combustion method using a new organic fuel alanine. The powder XRD, SEM and surface area measurements were carried out for characterization of nc-ZrO2. The powder XRD results revealed that, the nc-ZrO2 has the pure tetragonal phase. The crystallite size calculated by Scherrer＇s formula and BET surface area were found to be ca. 53--57 nm and ca. 275 m2/g, respectively. SEM micrograph exhibited the macroporous nature of the powder, nc-ZrO2 has been employed as a catalyst for the solvent-free synthesis of 3,4-dihydro- pyrimidin-2-ones （DHPMs） by a microwave （MW） assisted one-pot, multicomponent Biginelli condensation reaction of araldehydes, ethylacetoacetate and urea or thiourea. DHPMs are obtained in good to excellent yields （85%-- 96%） under this reaction condition within short interval of time （10--20 min）.