120-73-0Relevant articles and documents
Synthesis and properties of 2-guanidinopurines
Cesnek, Michal,Masojidkova, Milena,Holy, Antonin,Solinova, Veronika,Koval, Dusan,Kasicka, Vaclav
, p. 1303 - 1319 (2006)
2-Guanidinopurines were prepared as derivatives of 2,6-diamino-9-[2- (phosphonomethoxy)ethyl]-9H-purine (PMEDAP) (1), which shows an important antiviral activity. It completes earlier described synthesis of 6-guanidinopurine derivatives. The title compounds were obtained by the reaction of the corresponding 2-chloropurines with guanidine. 2- And 6-guanidinopurines were used as model compounds for determination of dissociation constants (pKa) of their ionogenic groups by capillary zone electrophoresis. The pKa values of ionogenic groups of the above compounds were compared with those of the corresponding aminopurines. The pKa of guanidino group at the purine moiety varies from 7.77 to 10.32. There is no protonation of N1-position in contrast to aminopurines. None of these compounds showed any antiviral activity.
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Grundmann,Kreutzberger
, p. 6559 (1955)
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Guanine, adenine, and hypoxanthine production in UV-irradiated formamide solutions: Relaxation of the requirements for prebiotic purine nucleobase formation
Barks, Hannah L.,Buckley, Ragan,Grieves, Gregory A.,Di Mauro, Ernesto,Hud, Nicholas V.,Orlando, Thomas M.
, p. 1240-1243+1159 (2010)
Relaxed requirements: We demonstrate the formation of adenine, hypoxanthine, and guanine from heated (130 °C), UV-irradiated formamide solutions in the absence of an inorganic catalyst. Evidence is also provided that "classical" HCN pathways for purine nucleobase production are also active in heated and UV-irradiated formamide reactions. (Chemical Equation Presented)
Monitoring the reactivity of formamide on amorphous SiO2 by in-situ UV-Raman spectroscopy and DFT modeling
Balucani, Nadia,Bonino, Francesca,Martra, Gianmario,Pantaleone, Stefano,Signorile, Matteo,Ugliengo, Piero
, (2020)
Formamide has been recognized in the literature as a key species in the formation of the complex molecules of life, such as nucleobases. Furthermore, several studies reported the impact of mineral phases as catalysts for its decomposition/polymerization processes, increasing the conversion and also favoring the formation of specific products. Despite the progresses in the field, in situ studies on these mineral-catalyzed processes are missing. In this work, we present an in situ UV-Raman characterization of the chemical evolution of formamide over amorphous SiO2 samples, selected as a prototype of silicate minerals. The experiments were carried out after reaction of formamide at 160 ?C on amorphous SiO2 (Aerosil OX50) either pristine or pre-calcined at 450 ?C, to remove a large fraction of surface silanol groups. Our measurements, interpreted on the basis of density functional B3LYP-D3 calculations, allow to assign the spectra bands in terms of specific complex organic molecules, namely, diaminomaleonitrile (DAMN), 5-aminoimidazole (AI), and purine, showing the role of the mineral surface on the formation of relevant prebiotic molecules.
HETEROCYCLIC COMPOUNDS AND USE THEREOF AS MODULATORS OF TYPE III RECEPTOR TYROSINE KINASES
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Paragraph 0714, (2016/08/03)
Provided herein are heterocyclic compounds for treatment of CSF1R, FLT3, KIT, and/or PDGFRβ kinase mediated diseases. Also provided are pharmaceutical compositions comprising the compounds and methods of using the compounds and compositions.