This perspective article discusses developments of metal-free hydrogenation catalysts derived from “frustrated Lewis pair” (FLP) systems. The range of catalysts uncovered and the applications to reductions of imines, aziridines, enamines, silyl enol ethers, diimines, metallocene derivatives and nitrogen-based heterocycles are described. In addition, FLP aromatic reduction of aniline derivatives to the cyclohexylamine analogs is discussed. The potential applications of these metal-free reductions are considered.
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Organic & Biomolecular Chemistry
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