Results 161 to 170 of about 6,074 (218)

Protolytic Equilibria in Tetrazoles

ChemInform, 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.
R. E. Trifonov, V. A. Ostrovskii
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Tetrazoles: XLV. Amidoalkylation of 5-Substituted Tetrazoles

Russian Journal of Organic Chemistry, 2003
Amidoalkylation of 5-aryl(hetaryl)tetrazoles with N-hydroxymethylamides of aliphatic and aromatic carboxylic acids occurs regioselectively and yields mainly 5-aryl(hetaryl)-2-acylaminomethyltetrazoles. These compounds arefairly stable in neutral media but are smoothly deprotected by the action of aqueous sodium hydroxide or hydrochloric acid.
L. V. Myznikov, K. A. Esikov, T. V. Artamonova, G. I. Koldobskii   +3 more
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Tetrazoles

ChemInform, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
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Tetrazoles: XLVII. A route to tetrazole-containing dendrimers

Russian Journal of Organic Chemistry, 2004
The reaction of 5-methylsulfonyl-1-phenyltetrazole with pentaerythritol in acetonitrile in the presence of sodium hydroxide gave tetrakis(1-phenyltetrazol-5-yloxymethyl)methane. Sulfur-containing analog of the latter was obtained by alkylation of 1-phenyl-4,5-dihydrotetrazole-5-thione with 1,3-dibromo-2,2-bis-(bromomethyl)propane.
T. V. Artamonova, M. V. Zatsepina, G. I. Koldobskii   +2 more
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Metal derivatives of tetrazoles

Russian Chemical Reviews, 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.
P. N. Gaponik, S. V. Voitekhovich, O. A. Ivashkevich   +2 more
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Synthesis of (difluoroamino)tetrazoles and [(difluoroamino)alkyl]tetrazoles

Russian Chemical Bulletin, 2000
(Difluoroamino)tetrazoles were obtained by direct fluorination of 5-aminotetrazoles with gaseous fluorine. Reactions of 2-(oxoalkyl)- and 2-(hydroxyalkyl)tetrazoles with difluoroamine yielded [(difluoroamino)alkyl]tetrazoles.
A. V. Fokin, Yu. N. Studnev, V. P. Stolyarov, A. A. Mel'nikov   +3 more
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Reactions of organotin tetrazoles: synthesis of functionalised poly-tetrazoles

Journal of the Chemical Society, Perkin Transactions 1, 1999
Reaction of 1,2-bis[2-(tributylstannyl)tetrazol-5-yl]benzene with 1,2-dibromoethane (1∶10) yields the 1-N,1-N′-ethylene bridged cyclophane (1) while similar reactions with larger excesses (1∶25) of 1,n-dibromoalkanes yield 1,2-bis[2-(bromoalkyl)tetrazol-5-yl]benzenes along with the unsymmetrical 1-N,2-N-substituted tetrazole isomers. Analogous products
Paul A. Bethel, Michael S. Hill, Mary F. Mahon, Kieran C. Molloy   +3 more
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Tetrazoles for biomedicine

Russian Chemical Reviews, 2019
The tetrazole ring is an important pharmacophore. It is a structural component in many drugs, drug candidates (or lead compounds) and various biochemical reagents.
Elena A. Popova, Rostislav E. Trifonov, Vladimir A. Ostrovskii   +2 more
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Tetrazoles: XLIX. Alkylation of tetrazoles with tetrakis(chloroacetoxymethyl)methane

Russian Journal of Organic Chemistry, 2006
Alkylation of 1-aryl-4,5-dihydro-1H-tetrazol-5-ones and 1-phenyl-4,5-dihydro-1H-tetrazole-5-thione with tetrakis(2-chloroacetoxymethyl)methane in boiling acetonitrile in the presence of potassium bromide and triethylamine gives tetrakis[2-(4-aryl-5-oxo-4,5-dihydro-1H-tetrazol-1-yl)acetoxymethyl]-methanes and tetrakis[2-(1-phenyl-1H-tetrazol-5 ...
M. V. Zatsepina, T. V. Artamonova, G. I. Koldobskii   +2 more
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The Hydrogen Bond Environments of 1H-Tetrazole and Tetrazolate Rings: The Structural Basis for Tetrazole–Carboxylic Acid Bioisosterism

Journal of Chemical Information and Modeling, 2012
Bioisosterism involving replacement of a carboxylic acid substituent by 1H-tetrazole, yielding deprotonated carboxylate and tetrazolate under physiological conditions, is a well-known synthetic strategy in medicinal chemistry. To improve our overall understanding of bioisosterism, we have used this example to study the geometrical and energetic aspects
Frank H. Allen, Colin R. Groom, John W. Liebeschuetz, David A. Bardwell, Tjelvar S. G. Olsson, Peter A. Wood   +5 more
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