BACKGROUND Green chemistry is a rapidly developing new field that provides us with a proactive avenue for the sustainable development of future science and technologies. Green chemistry uses highly efficient and environmentally benign synthetic protocols to deliver lifesaving medicines, accelerating lead optimization processes in drug discovery, with reduced unnecessary environmental impact. Fr...

the reaction of 3-chloropropyl boehmite nanoparticles with caffeine and sulfuric acid afforded bnps-3-propyl-imidazolopyridinium hydrogen sulfate [bnps-caff]hso4 as a new bnps-supported ionic liquid (il) catalyst. [bnps-caff]hso4 proved to be an efficient heterogeneous catalyst for the synthesis of pyrazolopyranopyrimidines via a one-pot four-component reaction of hydrazine hydrate, ethyl aceto...

Abstract Electronic interactions in donor-π-linker-acceptor systems with barbituric acid as an electron acceptor and possible donor were investigated to screen promising candidates a push–pull character based on experimental quantum chemical studies. The tautomeric properties of 5-benzylidenebarbituric derivatives studied NMR spectra, spectrophotometric determination the pKa values, calculation...

أشتمل هذا البحث تحضير وتشخيص عشرة معقدات جديدة لايونات Mn (II) , Co Ni Cu Hg مع مزيج من ليكاندات السكارين والباربيتيوريك / الثايوباربيتيوريك .
 وتضمن العمل تفاعل ايونات العناصر اعلاه وحامض الباربيتيوريك او الثايو باربيتيوريك بنسبة مولية ( 1:1:1 ) فلز : سكارين حامض شخصت المعقدات المحضرة بتقنيات درجات الانصهار والحساسية المغناطيسية والتحليل الدقيق للعناصر (C.H.N.S) والتوصيلية الكهربائية المو...

Early stud& with pyrimidines administered t.o animals established the fact that, these compounds arc metabolized (3, 4). Present concepts of the pathways of pyrimidine metabolism stem largely from the work of Cerecedo (4), in which he measured the changes in the urinary excretion of urea after feeding pyrimidines and related subst.ances. On the basis of these studies, he proposed an init.ial ox...

Hexagonal mesoporous silica (SBA-15) was prepared and then functionalized by(3-mercaptopropyl)trimethoxysilane. The obtained 3-mercaptopropyl functionalized SBA-15 (SBA-Pr-SH) was then oxidized using H2O2 in methanol under an acidic condition to give sulfonic acid functionalized mesoporous silica (SBA-Pr-SO3H). Th...

The reaction of 3-chloropropyl boehmite nanoparticles with caffeine and sulfuric acid afforded BNPs-3-propyl-imidazolopyridinium hydrogen sulfate [BNPs-Caff]HSO4 as a new BNPs-supported ionic liquid (IL) catalyst. [BNPs-Caff]HSO4 proved to be an efficient heterogeneous catalyst for the synthesis of pyrazolopyranopyrimidines via a one-pot four-component reaction of...