A Hafnium-Based Metal–Organic Framework as a Nature-Inspired Tandem Reaction Catalyst
2015
Beyzavi, Hudson | Vermeulen, Nicolaas A. | Howarth, Ashlee J. | Tussupbayev, Samat | League, Aaron B. | Schweitzer, Neil M. | Gallagher, James R. | Platero-Prats, Ana E. | Hafezi, Nema | Sarjeant, Amy A. | Miller, Jeffrey T. | Chapman, Karena W. | Stoddart, J Fraser | Cramer, Christopher J. | Hupp, Joseph T. | Farha, Omar K.
Tandem catalytic systems, often inspired by biological systems, offer many advantages in the formation of highly functionalized small molecules. Herein, a new metal–organic framework (MOF) with porphyrinic struts and Hf₆ nodes is reported. This MOF demonstrates catalytic efficacy in the tandem oxidation and functionalization of styrene utilizing molecular oxygen as a terminal oxidant. The product, a protected 1,2-aminoalcohol, is formed selectively and with high efficiency using this recyclable heterogeneous catalyst. Significantly, the unusual regioselective transformation occurs only when an Fe-decorated Hf₆ node and the Fe–porphyrin strut work in concert. This report is an example of concurrent orthogonal tandem catalysis.
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