64001-11-2Relevant articles and documents
Oxidation/ MCR domino protocol for direct transformation of methyl benzene, alcohol, and nitro compounds to the corresponding tetrazole using a three-functional redox catalytic system bearing TEMPO/Co(III)-porphyrin/ Ni(II) complex
Mahmoudi, Boshra,Rostami, Amin,Kazemnejadi, Milad,Hamah-Ameen, Baram Ahmed
, (2020/12/21)
A redox catalytic system for oxidation-reduction reactions and the domino preparation of tetrazole compounds from nitro and alcohol precursors was designed, prepared and characterized by UV–vis, GPC, TGA, XRD, EDX, XPS, VSM, FE-SEM, TEM, DLS, BET, NMR, and ICP analyses. The catalyst was prepared via several successive steps by demetalation of chlorophyll b, copolymerization with acrylated TEMPO monomers, complexation with Ni and Co metals (In two different steps), then immobilized on magnetic nanoparticles. The presence of three functional groups including TEMPO, coordinated cobalt, and coordinated nickel in the catalyst, allowed the oxidation of various types of alcohols, alkyl benzenes as well as the reduction of nitro compounds by a single catalyst. All reactions yielded up to 97 % selectivity for oxidation and reduction reactions. Next, the ability of the catalyst to successfully convert alcohol, methyl benzenes and nitro to their corresponding tetrazoles was studied.
Polymer-Supported Fe-Phthalocyanine Derived Heterogeneous Photo-Catalyst for the Synthesis of Tetrazoles Under Visible Light Irradiation
Khajone, Vijay Baburao,Balinge, Kamlesh Rudreshwar,Bhagat, Pundlik Rambhau
, p. 1948 - 1960 (2020/11/23)
Abstract: Herein, a polymer supported Fe-Phthalocyanine entangled with carboxyl functionalized benzimidazolium moiety (PSFePcCFBM) explored as heterogenous photocatalyst, for regioselective synthesis of 1H-tetrazoles from sodium azide and other affordable
Fe3O4?Hydrotalcite-NH2-CoII NPs: A novel and extremely effective heterogeneous magnetic nanocatalyst for synthesis of the 1-substituted 1H-1, 2, 3, 4-tetrazoles
Esmaeli-nasrabadi, Farzaneh,Salimi, Mehri,Sandaroos, Reza
, (2020/10/27)
In this study, we present a versatile and easy procedure for modifying a ferrite nanoparticles so step by step. A new nanocatalyst was prepared via CoII immobilized onto an aminated ferrite nanoparticles (Fe3O4?HT?AEPH2-CoII). The catalyst was fully characterized by FT-IR, EDX, FE-SEM, TGA, XRD, and VSM analyses. In the preparation of 1-substituted-1-H-tetrazole, the corresponding nanocatalyst shown great catalytic activity. The reaction contains expeditious reusable catalyst (Fe3O4?AEPH2-CoII) that promotes condensation between sodium azide, triethyl ortho-formate, and diversity of heterocyclic/aromatic amines. Also, an environmentally toxic solvent was eliminated. A significant improvement in the synthetic efficacy (95%, yield) was obtained by this new sustainable and eco-friendly protocol as well as high purity. The current procedure as a green protocol offers benefits including a simple operational procedure, an excellent yield of products, mild reaction conditions, minimum chemical wastes, short reaction time, and easy catalyst synthesis. Without any significant reduction in the catalytic performance, up to four recyclability cycles of the catalyst were obtained. The optimization results suggest that the best condition in the preparation of tetrazole derivatives is 0.005 g of the Fe3O4?HT?AEPH2-CoII catalyst where H2O is the solvent at 90 °C. The proposed protocol could be applied on a wider scope of the substrate (i.e., electron-deficient and electron-rich).
