Ordered mesoporous SBA ‐15 functionalized with yttrium(III) and cerium(III) complexes: Towards active heterogeneous catalysts for oxidation of sulfides and preparation of 5‐substituted 1H‐tetrazoles

Two novel and eco ‐friendly SBA‐15@Creatinine@M (M = Y and Ce) catalysts were prepared and characterized.
These mesostructured and reusable catalysts can be used efficiently for the synthesis of 5‐substituted 1H‐tetrazoles and for the oxidation of sulfides into sulfoxides.
The products were obtained in high to excellent yields in a short reaction time. Mesoporous SBA ‐15 was synthesized and modified with 3‐chloropropyltrimethoxysilane and then used in immobilization of creatinine groups, which were employed to introduce Y3+ and Ce3+ to give rise to two novel yttrium and cerium catalysts: SBA ‐15@Creatinine@M (M = Y and Ce). The structures of the SBA‐15@Creatinine@M catalysts were determined using various techniques. These catalysts offered outstanding catalytic performances in the oxidation of sulfides to sulfoxides and in the preparation of 5‐substituted 1H‐tetrazoles. An important characteristic of the SBA‐15@Creatinine@M catalysts is that they are very stable without a considerable decrease in their catalytic performance lasting seven cycles.

Source: Applied Organometallic Chemistry - November 19, 2018 Category: Chemistry Authors: Somayeh Molaei, Taiebeh Tamoradi, Mohammad Ghadermazi, Arash Ghorbani ‐Choghamarani Tags: FULL PAPER Source Type: research