Results 251 to 260 of about 30,850 (304)

Metal imidazolate sulphate frameworks as a variation of zeolitic imidazolate frameworks

Chemical Communications, 2022
Both imidazolate and sulphate ions can connect metal ions to give extended structures resembling zeolitic imidazolate frameworks.
Kyungkyou Noh, Jaeung Sim, Jonghoon Kim, Jaheon Kim   +3 more
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Condensation of mononucleotides by imidazole

Journal of Molecular Evolution, 1971
The condensation of thymidine-5′-monophosphate was carried out in the presence of imidazole in aqueous solutions at neutral pH. Formation of oligo-deoxyribonucleotides up to four units was observed.
J D, Ibanez, A P, Kimball, J, Oró
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Imidazole–imidazole stacking in some inorganic complexes

Inorganica Chimica Acta, 2009
Abstract Reaction of CuCl2 · 2H2O with the 1:1 condensate (L) of 2-(2-aminoethyl)pyridine and 1-methyl-2-imidazolecarboxaldehyde in methanol yields monomeric CuLCl2.H2O (1). Recrystallisation of 1 from aqueous methanol medium containing excess of PF 6 − affords the 1D coordination polymer [CuLCl]n(PF6)n (2).
Senjuti De, Michael G.B. Drew, Núria Aliaga-Alcalde, Dipankar Datta   +3 more
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Imidazole: Fungitoxic Derivatives

Science, 1967
Study of several new types of fungitoxic derivatives of imidazole reveals that imidazoles substituted on the imine nitrogen atom are likely to be active if the substituent is electron-attracting, and if the atom connecting it to the imidazolyl moiety has tetrahedral geometry.
H, Tolkmith, J N, Seiber, P B, Budde, D R, Mussell   +3 more
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Synthesis of difluoromethylthio imidazole from methylthio imidazole

Journal of Fluorine Chemistry, 1996
Abstract Demethylation of methylthio imidazole 1 via a Pummerer rearrangement onto the corresponding sulfoxide 2 afforded imidazole thiol 4 which was then difluoromethylated with the sodium chlorodifluoroacetate/NaI system in 71% overall yield.
Pierre Deprez, Jean-Paul Vevert
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Superelectrophilic Chemistry of Imidazoles

The Journal of Organic Chemistry, 2009
The mechanistic and synthetic chemistry of imidazole-based superelectrophiles has been studied. The protonated imidazole ring, or imidazolium group, is shown to enhance the electrophilic reactivity of an adjacent carboxonium group (compared to a related monocationic species).
Matthew R, Sheets, Ang, Li, Edward A, Bower, Andrew R, Weigel, Matthew P, Abbott, Robert M, Gallo, Adam A, Mitton, Douglas A, Klumpp   +7 more
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Structure of imidazole methemoglobin

Journal of Molecular Biology, 1981
Abstract Crystals of horse methemoglobin shatter when soaked in crystallization buffer containing high concentrations of imidazole. By using less than saturating concentrations of imidazole, a stable imidazole derivative of crystalline methemoglobin was prepared and analyzed by X-ray difference Fourier techniques.
J A, Bell, Z R, Korszun, K, Moffat
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Zeolite A imidazolate frameworks

Nature Materials, 2007
Faujasite (FAU) and zeolite A (LTA) are technologically important porous zeolites (aluminosilicates) because of their extensive use in petroleum cracking and water softening. Introducing organic units and transition metals into the backbone of these types of zeolite allows us to expand their pore structures, enhance their functionality and access new ...
Hideki, Hayashi, Adrien P, Côté, Hiroyasu, Furukawa, Michael, O'Keeffe, Omar M, Yaghi   +4 more
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Prebiotic synthesis of imidazole-4-acetaldehyde, imidazole-4-glycol and imidazole-4-ethanol

Origins of life and evolution of the biosphere, 1986
A wide var iety of chemical processes have been used for the synthesis of amino acids from prebiot ic molecular precursors under plausible pr imi t ive Earth conditions (M i l l e r , 1982). The prebiot ic formation of a l l protein-type amino acids has been demonstrated except for three amino acids: h is t id ine , lys ine, and arginine (Weber and Mi ...
C. Shen, L. Yang, S. L. Miller, J. Oró
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New Methods of Imidazole Functionalization - From Imidazole to Marine Alkaloids

Synlett, 2006
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Hongwang Du, Yong He, Rasapalli Sivappa, Carl J. Lovely   +3 more
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