Powdered diethylaminoethyl cellulose as biomass-derived support for phosphotungstic acid: new solid acidic catalyst for the synthesis of 2,3-dihydroquinazolin-4(1H)-ones
作者:Shaokang Li、Qianqian Zhang、Yanqing Peng
DOI:10.1007/s00706-015-1475-y
日期:2015.11
as solvent. Phosphotungstic acid anchored on the powdered diethylaminoethyl cellulose can be used as a biopolymer-supported solid acidic catalyst for the synthesis of 2,3-dihydroquinazolin-4(1H)-ones fromisatoicanhydride, amines, and aldehydes. The catalyst could be easily recovered by simple filtration and reused several times with minor decreases in the reactionyields. Graphical abstract
Ethylenediamine diacetate-catalyzed three-component reaction for the synthesis of 2,3-dihydroquinazolin-4(1H)-ones and their spirooxindole derivatives
作者:Manchala Narasimhulu、Yong Rok Lee
DOI:10.1016/j.tet.2011.08.018
日期:2011.12
Ethylenediamine diacetate (EDDA)-catalyzed one-pot syntheses of biologically interesting 2,3-dihydroquinazolin-4(1H)-ones and their spirooxindole derivatives from isatoic anhydride, amines, and benzaldehydes or isatins via a three-component condensation in aqueous media have been described. This method is of great value because of high yields and ease of handling. (C) 2011 Elsevier Ltd. All rights reserved.
Access to enhanced catalytic core–shell CuO–Pd nanoparticles for the organic transformations
作者:Kanchan Mishra、Nagaraj Basavegowda、Yong Rok Lee
DOI:10.1039/c6ra03883b
日期:——
This paper describes the biosynthesis of core–shell CuO–Pd nanocatalysts with the aid of a Cyperus rotundus rhizome extract.