Pyrazolines and their pyrazole congeners are important heterocyclic building blocks with numerous applications in the fine chemical industries. However, traditional routes towards these entities based on multistep syntheses generating substantial amounts of waste. Here we report an alternative approach using UV-light to convert tetrazoles pyrazolines via a reagent-free photo-click strategy. Thi...

An efficient method for the synthesis of 5-substituted-1H-tetrazoles through the reaction of nitriles with sodium azide using titanium oxide–supported boric acid (TiO2-H3BO3) catalyst was reported. The reactions were carried out at 120 °C and provided the corresponding tetrazoles in good to excellent yields. This method displayed significant advantages ...

An efficient method for the synthesis of 5-substituted-1H-tetrazoles through the reaction of nitriles with sodium azide using titanium oxide–supported boric acid (TiO2-H3BO3) catalyst was reported. The reactions were carried out at 120 °C and provided the corresponding tetrazoles in good to excellent yields. This method displayed significant advantages ...

We report a tetrazole-based, photoclick chemistry that can be employed to selectively functionalize an alkene genetically encoded in a protein inside E. coli cells. The reaction involved the treatment of E. coli cells with cell-permeable tetrazoles followed by a brief photo irradiation at 302 nm (4 min) and an overnight incubation at 4 degrees C. This in vivo alkene functionalization procedure ...

methanesulfonic acid (msa) was found to be an efficient catalyst for the synthesis of 1-substituted-1h-1,2,3,4-tetrazoles. a series of 1-substituted tetrazole compounds were synthesized from the reaction of various primary amines, sodium azide and triethyl orthoformate in the presence of catalytic amounts of msa at room temperature. in this protocol, some of the tetrazole derivatives were synth...