Synthesis of tetrazoles catalyzed by a new and recoverable nanocatalyst of cobalt on modified boehmite NPs with 1,3-bis(pyridin-3-ylmethyl)thiourea

Abstract

A new complex of cobalt was stabilized on boehmite nanoparticles as an efficient and selective nanocatalyst for the synthesis of tetrazoles. This catalyst is stable and it has heterogeneity nature; therefore, it can reused for several runs.

A New Neodymium Complex on Boehmite Nanoparticles with 1,3‐Bis(pyridine‐3‐ylmethyl)thiourea as a Practical and Reusable Nanocatalyst for the Chemoselective Synthesis of Tetrazoles

“…Since this reaction is exothermic, the temperature increases during the reaction, and so this temperature is sufficient for the release of H 2 S (confirmed by smell and blackening of lead acetate paper). After the performance of the reaction, the water‐insoluble product was filtered and then recrystallized from hot water and ethanol (1 : 1 v/v) [94] …”

“…After the performance of the reaction, the water-insoluble product was filtered and then recrystallized from hot water and ethanol (1 : 1 v/v). [94]…”

Copper (II)‐azo sulfathiazole complex immobilized on UiO‐66‐NH2 (MOF) as a catalyst for the one‐pot synthesis of spiroindole‐pyranopyrazoles

“…They result in lower costs, lower waste, and reduced pollution by reducing complexity and substrate variety. In addition, they reduce the number of atoms, pots, and steps 33–48 …”

Catalytic Tetrazole Synthesis via [3+2] Cycloaddition of NaN3 to Organonitriles Promoted by Co(II)-complex: Isolation and Characterization of a Co(II)-diazido Intermediate

“…With growing interest toward the development of novel tetrazole derivatives, several synthetic methods have evolved. − In particular, the [3+2] cycloaddition of azide with organic nitrile has been the most proficient route to 5-substituted 1H-tetrazoles. − To minimize the high activation barrier associated with the cycloaddition reactions, several homogeneous − and heterogeneous − catalysts and additives have been used. Many of those involve the use of expensive and toxic metals, − strong Lewis acids, − and mediated via highly explosive and toxic hydrazoic acid. , Although transition metal salts have been widely used to catalyze the synthesis of 5-substituted 1H-tetrazoles via dipolar cycloaddition, − use of metal complex catalysts is relatively limited .…”