Ring-Opening of Oxiranes using Taeniolite-Supported Tris(β-Diketonato)Zirconium

Abstract

Abstract.A series of tris(β-diketonato)zirconium(IV) complexes was immobilized into a synthetic clay structure of Taeniolite by an ion-exchange method to generate organic/inorganic hybrid compounds. The hybrid compound served as a good catalyst for ring-opening reactions of methyl, ethyl, and dimethyl oxiranes with various alcohols to generate primary alkoxy alcohols in appreciable selectivity. This method describes a technique to immobilize cationic zirconium complexes without losing selectivity.

Bis(dibenzoylmethanato)Zirconium(IV) Chloride Complex as a Potential Catalyst for the Ring Opening Polymerization of d-Valerolactone

“…Last, the signal that appears at 8.065-8.202 ppm is proton of Hd (d, 4H). The results of the 1H NMR analysis of the complex compound were identical to those found by other researchers [18].…”

“…After that, the complex formed was washed three times using n-hexane with a volume of 8 mL. The final step is drying the bis(dibzm) 2 Zr complex catalyst using vacuum [18]. [Zr(dibzm) 2 ]Cl 2 : Yield 59%.…”

MOFs and their grafted analogues: regioselective epoxide ring-opening with Zr6 nodes

“…19,20 Electron-poor terminal epoxides are challenging substrates to activate with Lewis acids, and studying trends in alkoxylation reactivity over heterogeneous Lewis acid catalysts provides insight into routes for upgrading conventional alkoxylation processes in industry. [19][20][21][22][23] In a few reports, homogeneous 24 and clay-supported 25,26 Zr IV catalysts have given high regioselectivity to the more sterically challenging β-alkoxy alcohols. Separately, some of us have reported highly regioselective and enantioretentive epoxide activation using the Hf-NU-1000 MOF catalyst (isostructural to the Zr-based NU-1000) for CO 2 fixation, methanolysis and azidolysis 27 and for ring-opening with mild hydrides.…”