A new facile cost-effective method for the oxidation of acetyl and carboethoxy derivatives of 3,4dihydropyrimidin-2(1H)-ones (DHPMs) by using potassium peroxydisulfate in water as solvent under microwave irradiation has been developed. Whereas the presence of the acetyl group instead of the carboethoxy group in position 5 decreases the rate of oxidation, the nature of the additional subtituent ...

Metalation of CH2OH-substituted triazolium salts with CoCl2 under basic conditions affords C,O-bidentate chelating carbene Co(III) complexes (3a, 3b), while analogous phenyl-substituted produce monodentate Co(II) (3c, 3d). The distinct substituent-induced properties the metal centers were demonstrated by electrochemical measurements and catalytic activities in two specific processes. showed app...

Abstract Seven novel azo dyes with 2-pyridone and dihydropyrimidinone moieties have been synthesized thoroughly characterized. The azo-hydrazone tautomerism has investigated by experimental theoretical approaches. optimizations of geometries performed density functional theory (DFT). vibrational NMR spectra were calculated correlated ones. Furthermore, quantum chemical descriptors MEP maps plot...

an efficient and environmentally friendly procedure for one-pot synthesis of 13-acetyl-9-methyl-11-ox-8-oxa-10,12-diazatricyclo [7.3.1. ] trideca-2,4,6-triene from salicylaldehyde, acetylaceton and urea via biginelli condensation and intramolecular michael-addition by using magnesium bromide as an expensive and easily available catalyst under solvent-free condition is desired. the structural el...

An effective one-pot synthesis of dihydropyrimidinonoes in solvent free conditions using CuCl2 as an inexpensive and readily available reagent through Biginelli condensation reaction of aldehyde derivatives, 1,3-dicarbonyl compounds and urea is described. Excellent yields, short reaction times for formation of the products and simple work-up are attractive features of this green prot...