Results 51 to 60 of about 18,166 (271)

The Structure of Nitro‐ and Polynitropyrazoles: X‐Ray Crystallography Versus Theoretical Calculations

Asian Journal of Organic Chemistry, EarlyView.
Abstract This publication presents the geometries of 157 nitro‐ and polynitropyrazoles. Among these, 109 compounds were theoretically studied using mainly the B3LYP/6–311++G(d,p) level of theory. Three‐parameter Lee‐Yang‐Parr (B3LYP) is a density functional theory (DFT) method widely used in computational chemistry and constitutes an acceptable ...
Rosa M. Claramunt, Marta Pérez‐Torralba, José Elguero, Ibon Alkorta   +3 more
wiley   +1 more source

Bemerkenswerte Reaktivität eines 1,2‐Dihydrodialans mit organischen Aziden – vom terminalen Diazido–Dialuman zur pendeluhrartigen Azidbrücke

Angewandte Chemie, EarlyView.
Die Reaktion eines Dihydro‐Dialans, das von einem Hybridliganden (DNI) koordiniert wird, mit organischen Aziden ergibt strukturell unterschiedliche Aluminiumspezies mit Aluminium in niedriger Oxidationsstufe: das erste Diazido‐Dialan, ein Aluminium‐Tetrazol und Produkte der Azid‐Aluminierung.
Xiaobai Wang, Franziska Traeger, Raphael F. Ligorio, Nico Graw, Regine Herbst‐Irmer, Anna Krawczuk, Malte Fischer, Dietmar Stalke   +7 more
wiley   +1 more source

Diazocarbonyl and Related Compounds in the Synthesis of Azoles

Molecules, 2021
Diazocarbonyl compounds have found numerous applications in many areas of chemistry. Among the most developed fields of diazo chemistry is the preparation of azoles from diazo compounds.
Anton Budeev, Grigory Kantin, Dmitry Dar’in, Mikhail Krasavin   +3 more
doaj   +1 more source

Construction of Difluoromethylated Tetrazoles via Silver-Catalyzed Regioselective [3 + 2] Cycloadditions of Aryl Diazonium Salts.

Organic Letters, 2019
A silver-catalyzed regioselective [3 + 2] cycloaddition reaction of PhSO2CF2CHN2 with aryl diazonium salts is described. This protocol enables the straightforward construction of a novel class of difluoromethylated tetrazoles under mild conditions ...
Xing Peng, Ming-Yang Xiao, Jun-Liang Zeng, Fa‐Guang Zhang, Jun‐An Ma   +4 more
semanticscholar   +1 more source

Neue Werkzeuge für die Inositolpyrophosphat‐Forschung: Stereoselektive Synthese und Einsatz von PP‐InsP₄‐Isomeren in der Pflanzenforschung

Angewandte Chemie, EarlyView.
Stereochemically defined inositol pyrophosphate isomers (PP‐InsP4) were synthesized and assigned by NMR spectroscopy using a chiral solvating reagent. In the form of isotopically labeled standards, they were applied in CE‐MS‐based profiling of plant extracts and kinase assays, enabling structural reassignment and functional insight into enzymatic ...
Kevin Ritter, Anne‐Sophie C. Braun, Guizhen Liu, Mengsi Lu, Verena Gaugler, Gabriel Schaaf, Henning Jacob Jessen   +6 more
wiley   +1 more source

One-Pot Synthesis of Tetrazole–Triazole Bis-Heterocycles via Ugi–Azide Reaction

Chemistry Proceedings, 2023
Bioisosteres of amide bonds such as 4,5-disubstituted-1,2,3-triazoles (4,5-DS-1,2,3-Ts) and 1,5-disubstituted tetrazoles (1,5-DST) are present in compounds with important biological activities like those that are antineoplastic, antibacterial, antifungal,
Fidel Rodriguez-Lopez, Carlos Zárate-Hernández, Manuel A. Rentería-Gómez, Rocío Gámez-Montaño   +3 more
doaj   +1 more source

Catalytic Direct Regioselective Synthesis of Phosphonylated Tetrazoles from Aryl Diazonium Salts and Seyferth-Gilbert Reagent.

Organic Letters, 2019
Here we report a Ag-catalyzed [3 + 2] cycloaddition reaction between aryl diazonium salts and Seyferth-Gilbert reagent in a regioselective manner. This operationally simple transformation proceeds in an atom-economical way under mild reaction conditions,
Shi-Jing Zhai, Xing Peng, Fa‐Guang Zhang, Jun‐An Ma   +3 more
semanticscholar   +1 more source

Rapid microwave promoted heterocyclization of primary amines with triethyl orthoformate and sodium azide using zinc sulfide nanoparticles as recyclable catalyst

Green Chemistry Letters and Reviews, 2018
Microwave assisted synthesis of 1-substituted-1H-tetrazoles was developed using zinc sulfide nanoparticles as heterogeneous catalyst under solvent free conditions.
Hossein Naeimi, Fatemeh Kiani, Mohsen Moradian   +2 more
doaj   +1 more source

Impact of the Major Candida glabrata Triazole Resistance Determinants on the Activity of the Novel Investigational Tetrazoles VT-1598 and VT-1161

Antimicrobial Agents and Chemotherapy, 2019
VT-1161 and VT-1598 are promising investigational tetrazole antifungals that have shown in vitro and in vivo activity against Candida and other fungi.
A. Nishimoto, S. Whaley, N. Wiederhold, Qing Zhang, C. M. Yates, W. Hoekstra, R. Schotzinger, E. Garvey, P. Rogers   +8 more
semanticscholar   +1 more source

Semisynthesis of 6β-Acetoxyvouacapane Derivatives via the Ugi-Azide Multicomponent Reaction

Chemistry Proceedings, 2022
A semisynthesis of 6β-acetoxyvouacapane-1,5-disusbtituted tetrazoles derivatives from the leaves of Caesalpinia platyloba by using the Ugi-azide multicomponent reaction as a key step reaction is described. To our knowledge, this is the first report where
Gabriela Servín-García, Luis Chacón-García, Joaquín González-Marrero, Mariana Macías-Alonso, Mario A. Gómez-Hurtado, Gabriela Rodríguez-García, Rosa E. del Río, Carlos J. Cortés-García   +7 more
doaj   +1 more source