Green Synthesis of Copper Oxide Nanoparticles with an Extract of <i>Euphorbia maculata</i> and Their Use in the Biginelli Reaction
作者:Heshmatollah Alinezhad、Khatereh Pakzad
DOI:10.1080/00304948.2020.1764819
日期:2020.7.3
biological method because it can produce nanoparticles on a large scale with no need for culture. Copper, of course, is abundantly found in numerous salts in nature and these serve as the primary sources for copper oxide nanoparticles. CuO NPs are used to improve the viscosity of energy transferring fluids, in addition to raising thermal conductivity. Industrially, CuO NPs are broadly applied as p-type semiconductors
NbCl<sub>5</sub>-catalyzed Rapid and Efficient Synthesis of 3,4-Dihydropyrimidinones Under Ambient Conditions
作者:J. S. Yadav、B. V. S. Reddy、Jaishri J. Naidu、K. Sadashiv
DOI:10.1246/cl.2004.926
日期:2004.7
Three-component condensation of an aldehyde, 1,3-dicarbonyl compound and urea or thiourea proceeds smoothly at room temperature in the presence of 5 mol % of NbCl5 under extremely mild conditions to afford the corresponding 3,4-dihydropyrimidines in high to quantitative yields. This method is very useful for the synthesis of a wide range of dipyrimidinones at room temperature from aromatic, heterocyclic, and aliphatic aldehydes.