منابع مشابه
Enzymatic synthesis of citric acid. I. Synthesis with soluble enzymes.
The synthesis of citrate from acetate, ATP,’ and oxalacetate by soluble enzyme preparations from pigeon liver was briefly reported in 1949 (1). CoA was found to be required for activity. Similar results were later reported by Novelli and Lipmann (2) with preparations from yeast and Escherichiu coli, and by Elliott and Kalnitsky (3) with kidney acetone powder extracts. It was further shown (1) t...
متن کاملSynthesis of Amino Acids Analogues of Citric Acid Siderophores
Three am ino acid analogues o f citric acid siderophores were synthesized. The synthetic strategy involved condensation o f 2-ter/-butyl-l,3-di(N -hydroxysuccinim idyl) or 2-tert-buiy\l,3-bis(pentachlorophenyl)citrates with N -ethyl-co-am inoalkylhydroxam ates. The exam ina tion o f biological properties o f the obtained com pounds revealed their poor, if any siderophore activity and thus conf...
متن کاملOne-pot, organocatalytic synthesis of spirooxindoles using citric acid in aqueous media
Spirooxindoles are important synthetic targets possessing extended biological activity and drug discovery applications.The development of multicomponent reactions designed to produce elaborate biologically active compounds has become an important area of research in organic, combinatorial, and medicinal chemistry. in this Manuscript, a facile and efficient multicomponent synthesis of functional...
متن کاملCitric acid as an efficient and green catalyst for the synthesis of hexabenzylhexaazaisowurtzitane (HBIW)
The condensation of benzylamine with glyoxal leads to Hexabenzylhexaazaisowurtzitane (HBIW) in acetonitrile solvent with citric acid as a green catalyst under both conventional stirring and ultrasonic irradiation conditions. The influence of four variables, including the amount of catalyst, solvent, reaction time and ultrasonic power, on the reaction yield was investigated. The results showed t...
متن کاملSynthesis and Characterization of PbTiO3 Nanopowders by Citric Acid Gel Method
High purity lead titanate nanopowders in tetragonal form have been successfully prepared bycitric acid gel method using lead nitrate and tetra-n-butyl titanate as Pb and Ti sourcesrespectively and citric acid as complexing reagent. The precursors were calcined at varioustemperatures ranging from 450 °C to 600 °C for 2 h. Fourier Transform InfraredSpectroscopy (FT-IR), X-ray diffraction (XRD) an...
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ژورنال
عنوان ژورنال: Nature
سال: 1880
ISSN: 0028-0836,1476-4687
DOI: 10.1038/022585f0