overcome this difficulty, we used aqueous hydrotropic solution, which increases the solubility of organic compounds in water by 200-fold. We report an environmentally efficient method for synthesis of pyridopyrimidine carbonitriles and spiro-oxindole dihydroquinazolinones by using 50 % aqueous sodium p-toluene sulfonate (NaPTS) solution at ambient reaction condition. The merits of the present protocol
2-Aminoethanesulfonic acid: An efficient organocatalyst for green synthesis of spirooxindole dihydroquinazolinones and novel 1,2-(dihydroquinazolin-3(4<i>H</i>)isonicotinamides in water
作者:Asha V. Chate、Priyanka P. Rudrawar、Giribala M. Bondle、Jaiprakash N. Sangeshetti
DOI:10.1080/00397911.2019.1692868
日期:2020.1.17
friendliness, good yields, and convenient operation. The reaction proceeds efficiently using water as green solvent and nontoxic catalysts that could be efficiently reused. Together with this simple workup procedure, use of the organocatalyst, and water as solvent without the need of columnchromatographic purification, are the notable features of this methodology, which make this protocol a very efficient
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.