Solvent-assisted ligand exchange (SALE) for the enhancement of epoxide ring-opening reaction catalysis based on three amide-functionalized metal–organic frameworks

Abstract

In recent years, functionalized pillar ligands have gained significant interests due to their important role in MOF structure and performance.

Ultrasonic Synthesis and Characterization of 2D and 3D Metal–Organic Frameworks and Their Application in the Oxidative Amidation Reaction

“…These data reveal that the sonochemically synthesized MOFs are structurally identical with or almost similar to those of the simulated pattern form the single-crystal data. 20 There is a good agreement in most of the peaks in the PXRD pattern, for example, with 2θ of values of 7.20, 13.10, 17.60, 18.60, 18.70, 20, 25.00, and 26.00° for AM-Co1 and 7.20, 7.25, 7.30, 14.00, 15.20, 15.25, 18.70, 20.50, 22.20, 24.20, 28.00, and 33.30° for AM-Co2. The small displacement can be due to the different preparation methods.…”

Influence of Hydrogen Bond Donating Sites in UiO‐66 Metal‐Organic Framework for Highly Regioselective Methanolysis of Epoxides

“…[24,[30][31][32][33] Alcohols having relatively poor nucleophilicity are not preferred candidates due to the production of lower yields in the ring-opening of epoxides reaction. [34] Hence, this type of reaction can be promoted by enhancing the electrophilicity of epoxides. Traditionally, the activation of epoxides was achieved by employing catalysts possessing either LA or BA sites or both of them.…”

“…[38,39] In recent times, numerous attempts have been dedicated to develop MOF based heterogeneous catalysts possessing LA metal center or BA functional groups in the linker like À SO 3 H and À OH for the methanolysis of epoxides. [24,29,34,[40][41][42][43][44] However, some of these catalytic reactions still have drawbacks like unsatisfactory selectivity of product, robustness and recyclability of catalyst and harsh reaction conditions. [24,25] Hence, developing new heterogeneous catalysts to promote methanolysis of epoxide with very high regioselectivity at very high conversion of epoxide is of great interest.…”

“…Alcoholysis of epoxides is a well‐established chemical transformation reaction that can be achieved by various homogeneous and heterogeneous catalysts . Alcohols having relatively poor nucleophilicity are not preferred candidates due to the production of lower yields in the ring‐opening of epoxides reaction . Hence, this type of reaction can be promoted by enhancing the electrophilicity of epoxides.…”

“…The major problems arising during the use of homogeneous catalyst are the difficulty in the separation from the reaction mixture and inability to reuse . In recent times, numerous attempts have been dedicated to develop MOF based heterogeneous catalysts possessing LA metal center or BA functional groups in the linker like −SO 3 H and −OH for the methanolysis of epoxides . However, some of these catalytic reactions still have drawbacks like unsatisfactory selectivity of product, robustness and recyclability of catalyst and harsh reaction conditions .…”