Results 211 to 220 of about 17,991 (268)
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Journal of Organic Chemistry, 2020
A Bu4NI-catalyzed regioselective N2-methylation, N2-alkylation and N2-arylation of tetrazoles have been achieved using tert-butyl hydroperoxide (TBHP) as the methyl, alkyl diacyl peroxides as the primary alkyl, alkyl peresters as the secondary and ...
Suresh Rajamanickam +7 more
semanticscholar +1 more source
A Bu4NI-catalyzed regioselective N2-methylation, N2-alkylation and N2-arylation of tetrazoles have been achieved using tert-butyl hydroperoxide (TBHP) as the methyl, alkyl diacyl peroxides as the primary alkyl, alkyl peresters as the secondary and ...
Suresh Rajamanickam +7 more
semanticscholar +1 more source
ChemInform Abstract: Synthesis of (Difluoroamino)tetrazoles and [(Difluoroamino)alkyl]tetrazoles
ChemInform, 2000AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Yu. N. Studnev +3 more
openaire +3 more sources
Journal of Molecular Structure: THEOCHEM, 2007
Abstract The energies, geometries and aromaticity of a series of 5R tetrazoles [R = NH 2 , OH, OCH 3 , SCH 3 , H, CH 3 , F, Cl, BH 2 , CF 3 , CN, NO, NO 2 ], their anions and protonated forms in the gas phase have been calculated with the DFT/B3LYP method at the 6-31++G ∗∗ level.
Abbas Teimouri +2 more
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Abstract The energies, geometries and aromaticity of a series of 5R tetrazoles [R = NH 2 , OH, OCH 3 , SCH 3 , H, CH 3 , F, Cl, BH 2 , CF 3 , CN, NO, NO 2 ], their anions and protonated forms in the gas phase have been calculated with the DFT/B3LYP method at the 6-31++G ∗∗ level.
Abbas Teimouri +2 more
openaire +2 more sources
An Expeditious Approach to Tetrazoles from Amides Utilizing Phosphorazidates.
Organic Letters, 2020A novel method was developed for the synthesis of tetrazoles from amides utilizing diphenyl phosphorazidate or bis(p-nitrophenyl) phosphorazidate as both the activator of amide-oxygen for elimination and azide source.
Kotaro Ishihara, T. Shioiri*, M. Matsugi
semanticscholar +1 more source
Tetrazoles: XLIX. Alkylation of tetrazoles with tetrakis(chloroacetoxymethyl)methane [PDF]
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 ...
G. I. Koldobskii +2 more
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Magnetic nanomaterials catalyzed synthesis of tetrazoles
, 2020Tetrazoles are valuable molecules in pharmaceutical and agriculture chemistry, because they are excited in many drugs, natural products and biologically active molecules.
Muhammad Aqeel Ashraf +4 more
semanticscholar +1 more source
Silylated Tetrazoles and Triazoles
Zeitschrift für anorganische und allgemeine Chemie, 2009Abstract1‐Dimethysilyltetrazole (1) has been prepared from 1H‐tetrazole and chlorodimethylsilane in the presence of 2,6‐lutidine, bis(1‐tetrazolyl)dimethylsilane (2) from the reaction of 1H‐tetrazole, dimethyldichlorosilane and triethylamine and 5‐(trimethylsilylamino)‐1H‐tetrazole (3) from 5‐amino‐tetrazole monohydrate and hexamethyldisilazane.
Gronde, Ingo, Mitzel, Norbert W.
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2008
Tetrazoles were discovered by Bladin over 120 years ago (1885). Since then, tetrazole and its derivatives have attracted interest by their unique structure and extreme characteristics. Especially great activity in this field of chemistry has been observed since 1996.
R.E. Trifonov +2 more
openaire +2 more sources
Tetrazoles were discovered by Bladin over 120 years ago (1885). Since then, tetrazole and its derivatives have attracted interest by their unique structure and extreme characteristics. Especially great activity in this field of chemistry has been observed since 1996.
R.E. Trifonov +2 more
openaire +2 more sources
ChemInform Abstract: Reactions of Organotin Tetrazoles: Synthesis of Functionalized Poly‐tetrazoles.
ChemInform, 1999AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Mary F. Mahon +3 more
openaire +3 more sources
Catalytic Direct Construction of Cyano-tetrazoles.
Organic Letters, 2020Cyano-tetrazole is the first reported compound that bears four nitrogen atoms in a single five-membered ring. This unique molecular scaffold has long been ignored after its discovery in 1885, mainly attributed to the scarcity of available synthetic ...
Ming-Yang Xiao +5 more
semanticscholar +1 more source