نتایج جستجو برای: barbituric acid
تعداد نتایج: 747479 فیلتر نتایج به سال:
A class of tunable visible and near-infrared donor-acceptor Stenhouse adduct (DASA) photoswitches were efficiently synthesized in 2 to 4 steps from commercially available starting materials with minimal purification. Using either Meldrum's or barbituric acid "acceptors" in combination with aniline-based "donors" an absorption range spanning from 450 to 750 nm is obtained. Additionally, photoiso...
over a period of 48 years . ? . the biggest achievement which any single author could produce in his lifetime. A new and a very interesting chapter has rightly been devoted to ' Alloxan' diabetes, which can be produced in experimental animals by the injection of a chemical ' Alloxan' with almost unbelievable specificity. Alloxan is the ureide of mesoxalic acid and can be produced by oxidation o...
The alkylation of beta-dicarbonyl compounds in a K2CO3/DMSO system was found to afford O- and C-alkylated derivatives, depending on the type of the beta-dicarbonyl compound involved. The alkyl derivatives obtained were used in the synthesis of some new spiro barbituric acid derivatives. Quantum chemical calculations were carried out to elucidate the reaction mechanisms for some typical synthesis.
The syntheses of calix[4]arene dimelamines that are functionalized with alkyl, aminoalkyl, ureido, pyridyl, carbohydrate, amino acid and peptide functionalities, and their self-assembly with barbituric acid or cyanuric acid derivatives into well-defined hydrogen-bonded nanostructures are described. The thermodynamic stability of these hydrogen-bonded assemblies was studied by CD spectroscopy in...
Barbiturates, which are derived from the medically significant substance barbituric acid also known as malonylurea or 4-hydroxyuracil, employed anaesthetics, sedative-hypnotics, anticonvulsants, and depressants of central nervous system. In recent years, researchers have paid great attention to compounds derivatives acid, although first was discovered in 1864 by Adolf Von Baeyer. Due its medica...
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