In 2021.0 CATAL TODAY published article about METAL-ORGANIC FRAMEWORK; DEACETALIZATION; CONDENSATION; HYDROGEN; SITES in [Lee, Yu-Ri; Do, Xuan Huy; Hwang, Seung Sang; Baek, Kyung-Youl] Korea Inst Sci & Technol, Mat Architecturing Res Ctr, Seoul 02792, South Korea; [Do, Xuan Huy; Baek, Kyung-Youl] Korea Univ Sci & Technol, KIST Sch, Div Nano Informat Technol, Seoul 02792, South Korea; [Baek, Kyung-Youl] Korea Res Inst Chem Technol, Ctr Convergent Chem Proc, 141 Gajeong Ro, Daejeon 34114, South Korea in 2021.0, Cited 29.0. The Name is 1H-1,2,4-Triazol-5-amine. Through research, I have a further understanding and discovery of 61-82-5. Application In Synthesis of 1H-1,2,4-Triazol-5-amine
An acid-base bifunctional zeolitic imidazolate framework catalyst (ZIF8-A61-SO3H) with amine and sulfonic acid groups was successfully prepared through simple two step post-synthetic modification: preparation of aminefunctionalized ZIF-8 with amine contents of 61% (ZIF8-A61) by the ligand exchange of 2-mIM with 3-amino1,2,4-triazole (Atz), followed by the sulfonic acid functionalization by the ring-opening reaction of 1,3-propanesultone with -NH2 groups in ZIF8-A61. Amine-functionalized ZIF8-A materials with difference amine contents (15%, 34%, and 61%, respectively) were also prepared by controlling the synthesis time. All obtained ZIF catalysts evaluated as a heterogeneous catalyst for one-pot deacetalization-Knoevenagel condensation tandem reaction. Compared with ZIF-8 and amine-functionalized ZIF-8 catalysts, ZIF8-A61-SO3H catalyst showed good catalytic performance with 100% conversion of the reactant and 98% selectivity of the final Knoevenagel product. An enhanced catalytic activity can be attributed to the co-existence of site-isolated acid-base groups on the ZIF8-A61-SO3H catalyst in close proximity. The heterogeneous nature of the catalytic system was confirmed by a hot-filtering test and the catalyst also exhibited reusable in the five repeated cycles. A plausible catalytic mechanism of deacetalization-Knoevenagel condensation reaction over ZIF8-A61-SO3H was also proposed.
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Reference:
Article; Safari, Niloufar; Shirini, Farhad; Tajik, Hassan; Journal of Molecular Structure; vol. 1201; (2020);,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics