(Thio)urea-Based Covalent Organic Framework as a Hydrogen-Bond-Donating Catalyst
Ji‐Yun Hu, Federica Zanca, Patricia Lambe, Miu Tsuji, Samantha Wijeweera, Stefano Todisco, Piero Mastrorilli, William M. Shirley, Mourad Benamara, Peyman Z. Moghadam, M. Hassan Beyzavi
Abstract
Two-dimensional urea- and thiourea-containing covalent organic frameworks (COFs) were synthesized at ambient conditions at large scale within 1 h in the absence of an acid catalyst. The site-isolated urea and thiourea in the COF showed enhanced catalytic efficiency as a hydrogen-bond-donating organocatalyst compared to the molecular counterparts in epoxide ring-opening reaction, aldehyde acetalization, and Friedel-Crafts reaction. The COF catalysts also had excellent recyclability.
Topics & Concepts
ThioureaCatalysisCovalent bondAldehydeThio-UreaHydrogen bondEpoxideMaterials scienceOrganic chemistryRing (chemistry)Polymer chemistryChemistryMoleculeCovalent Organic Framework ApplicationsMetal-Organic Frameworks: Synthesis and ApplicationsChemical Synthesis and Reactions