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Upstream product

• 77919-95-0 N-Amino-N'-<4-chlor-phenyl>guanidin 
• 3696-23-9 N-(4-chlorophenyl)thiourea 
• 64-17-5 ethanol 
• 13463-94-0 N-(4-chlorophenyl)cyanamide 
• 4418-61-5 5-aminotetrazole 
• 637-87-6 1-Chloro-4-iodobenzene 
• 2131-55-7 4-Chlorophenyl isothiocyanate 

Relevant academic research and scientific papers

Biosynthesis and characterization of magnetic starch-silver nanocomposite: catalytic activity in eco-friendly media

AgNPs@Fe3O4-nanostarch nanocomposite was prepared using Helicteres isora L. extract as a reducing and stabilizing agent. FESEM, EDS, TEM, FT-IR, XRD, VSM, and elemental mapping were utilized to characterize the synthesized nanocomposite. The nanocomposite was applied as a magnetically separable and reusable catalyst for the efficient preparation of various arylaminotetrazoles by reacting different arylcyanamides with sodium azide in high yields without forming hydrazoic acid. We report the oxidation of benzyl alcohol to benzaldehyde by hydrogen peroxide under solvent-free conditions in good yields using AgNPs@Fe3O4-nanostarch as a magnetically separable and reusable catalyst. The catalyst showed high catalytic performance in the reduction of 4-NP, CR, RhB and MB using NaBH4 as the source of hydrogen in an aqueous medium. The products were formed in good yields through a simple method and facile work-up. In addition, the catalyst could easily be separated from the reaction mixture using an external magnet and reused for at least 5 runs with no significant loss of catalytic activity.

Functionalization of chitosan by grafting Cu(II)-5-amino-1H-tetrazole complex as a magnetically recyclable catalyst for C-N coupling reaction

The functionalization of chitosan (as a linear polysaccharide) with a copper complex to expand the areas of its potential applications is an important scientific task. The present work reports the application of Cu(II)-5-amino-1H-tetrazole complex immobilized on modified magnetic chitosan as an effective catalyst (Fe3O4@Chitosan-Tet-Cu(II)) for C-N bond cross-coupling reaction between 5-aminotetrazole and aryl halides under ligand-free conditions in dioxane solvent. The prepared magnetic nanocatalyst was characterized by FT-IR, EDS, TEM, HRTEM, VSM, FFT, XRD, TG-DTG, ICP-MS, and elemental mapping analyses. 1-Aryl-5-amino-1H-tetrazoles were produced in high yields. The advantages of this catalytic process include simple methodology, avoiding the use of harmful catalysts, short reaction times, excellent yields, easy work-up, and environmentally friendly conditions. Fe3O4@Chitosan-Tet-Cu(II) catalyst exhibited high efficacy and reusability/recyclability even after seven consecutive cycles with low loss of catalytic activity.

Iron-promoted sulfur sequestration for the substituent-dependent regioselective synthesis of tetrazoles and guanidines

We have established a facile and versatile synthetic methodology for the construction of tetrazoles and guanidines in the presence of an eco-friendly, inexpensive, easily available iron reagent. Aromatic thioureas with electron-donating substituents produced their respective target products in quantitative yield. In contrast, when electron-withdrawing substituted aromatic thioureas were used, the expected products were obtained in reduced yield. However, the desired products were obtained in good yield at moderate temperature. In addition, mechanistic studies revealed that the synthetic route involved iron-based subsequent reactions of addition and removal of sulfur.

Ultrasound irradiation and green synthesized CuO-NiO-ZnO mixed metal oxide: An efficient sono/nano-catalytic system toward a regioselective synthesis of 1-aryl-5-amino-1H-tetrazoles

An efficient approach has been reported that 1-aryl-5-amino-1H-tetrazoles are prepared from structurally diverse N-arylcyanamides and sodium azide using sono/nano-catalytic system. The mixed metal oxide nanoparticles (NPs) (CuO, NiO, and ZnO NPs) were prepared with utilizing aqueous leaves extracts of the Rheum ribes. In this study, the effect of the reaction condition was investigated on the catalytic activity and selectivity of mixed metal oxide NPs for the synthesis of aminotetrazole derivatives. In this regard, various reaction conditions were precisely compared such as reflux and ultrasonication (US). In this study, the regioselective synthesis of 1-aryl-5-amino-1H-tetrazoles with high yield was achieved by the synergistic effect between US irradiation and prepared nanocatalyst which showed the potential of sono/nano-catalytic system in organic synthesis. Furthermore, the as-prepared nanocatalyst could be reused and recovered from the reaction mixture for several times without consequential abate in its catalytic activity and selectivity.

Cobalt-promoted one-pot reaction of isothiocyanates toward the synthesis of aryl/alkylcyanamides and substituted tetrazoles

[Figure not available: see fulltext.] The synthesis of cyanamides and tetrazoles from isothiocyanates through tandem reaction using cobalt catalyst has been demonstrated. In the case of tetrazole preparation, the reaction involved addition/desulfurization/nucleophilic addition/electrocyclization, whereas aromatic cyanamides were constructed from isothiocyanates through addition/desulfurization. Cheap cobalt sulfate was used for the synthesis of various cyanamides and tetrazoles. In addition, cobalt catalyst was found to be desulfurization reagent that has not been previously reported. The final products have been obtained from starting precursors in good to high yield.

Temperature dependent regioselective synthesis of aryl tetrazole amines using copper source

One pot highly efficient and simple protocol for the construction of aryl tetrazole amines via desulphurization/substitution/electro cyclization/C-N cross coupling reactions from thiourea with the use of cheap, readily available and air stable copper sour

Cobalt-promoted regioselective preparation of aryl tetrazole amines

Abstract: A highly general, efficient and simple methodology for the regioselective synthesis of aryl tetrazole amines has been explored. The present method involves consecutive desulphurization and C- N cross-coupling reaction. Cheap, readily available and air stable cobalt catalyst has been used for this methodology. In addition, the substrate scope has been demonstrated. Graphical Abstract: A highly general, efficient and simple methodology for the regioselective synthesis of aryl tetrazole amines has been explored. The present method involves consecutive desulphurization and C- N cross-coupling reaction.

A versatile synthesis of arylaminotetrazoles by a magnetic Fe@Phendiol@Mn nano-particle catalyst and its theoretical studies

The Fe3O4 magnetic nano-particles were modified with 1,10-phenanthroline-5,6-diol and the relevant Mn complex (Fe@Phendiol@Mn) synthesized as a nano-magnetic heterogeneous catalyst to be used for the synthesis of various arylaminotet

Green chemistry: ZrOCl2·8H2O catalyzed regioselective synthesis of 5-amino-1-aryl-1H-tetrazoles from secondary arylcyanamides in water

A green and efficient method for the synthesis of 5-amino-1-aryl-1H- tetrazoles with excellent yields and high purity from secondary arylcyanamides is described. This method is completely green because no organic solvents or protic acid catalyst is used t

Synthesis of arylaminotetrazoles by ZnCl2/AlCl 3/silica as an efficient heterogeneous catalyst

Arylaminotetrazoles were efficiently synthesized from secondary arylcyanamides by application of ZnCl2/AlCl3/silica as a reusable heterogeneous Lewis acid catalyst. 5-Arylamino-1H-tetrazoles can be obtained from arylcyanamides carryi