Deoxygenation of Nitrous Oxide and Nitro Compounds Using Bis(N-Heterocyclic Silylene)Amido Iron Complexes as Catalysts
2021
Herein, we report the efficient degradation of N2O with a well-defined bis(silylene)amido iron complex as catalyst. The deoxygenation of N2O using the iron silanone complex ( 4 ) as a catalyst and pinacolborane (HBpin) as a sacrificial reagent proceeds smoothly at 50 ⁰C to form N2 , H2, and (pinB)2O. Mechanistic studies suggest that the iron-silicon cooperativity is the key to this catalytic transformation, which involves N2O activation, H atom transfer, H2 release and oxygenation of the boron sites. This approach has been further developed to enable catalytic reductions of nitro compounds, producing amino-boranes with good functional-group tolerance and excellent chemoselectivity.
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