The First C−Cl Activation in Ullmann C−O Coupling by MOFs

Abstract

It was found that introduction of only 0.03 mol % Ag(I) into the framework of Cu3(BTC)2 ⋅ xH2O in maghemite anchored CuBTC activated the inert CuBTC astonishingly to exhibit unexpected high catalytic activity for C−Cl activation in coupling of chloroarenes with phenols without the use of expensive ligands. This is the first application of mixed‐metal MOFs in the C−X activation. Putting reusability and activity together, a TON over 15000 was obtained which is the highest TON compared with all its precedents even better than the results by Pd catalysts.

In situ construction of halogen MOF bifunctional catalysts for synergistic removal of NO and Hg0

“…This observation indicates the chemical stability of the catalyst and suggests that its structure was not compromised during the halogenation process. 31 Therefore, it can be inferred that X-Cu-Ce-BTC is stable, and the halogen loading process has been successful accomplished.…”

“…The emergence of a new peak at 651 cm −1 confirms the successful loading of halogen (Cl, Br, I) onto the Cu–Ce–BTC catalyst, corresponding to C–X vibrations. 31 Therefore, it can be inferred that X–Cu–Ce–BTC is stable, and the halogen loading process has been successful accomplished.…”

Recent Advancement of Ullmann Condensation Coupling Reaction in the Formation of Aryl-Oxygen (C-O) Bonding by Copper-Mediated Catalyst

“…The co-catalyst of gold with copper exhibited is unexpected high catalytic activity for aryl-Cl in coupling of chloroarenes with phenols without presence of ligands (Scheme 38). The AgCuBTC-MOF shown high TON value (>15,000), which is better than using only Pd as a catalyst [108]. Table 8 was depicted the comparison of a single catalyst and with a combined catalyst in the Ullmann O-arylation reaction.…”