Asymmetric hydrogenation frustrated Lewis pairs

Ghattas, G. Ghen, D. Pan, R Klankermayer, J. Asymmetric Hydrogenation of Imines with a Recyclable Ghiral Frustrated Lewis Pair Gatalyst. Dalton Trans. 2012,41,9026-9028. 

An article is exclusively focused on outer sphere catalysts. In outer-sphere hydrogen catalysis, substrates such as ketone, imine, or A-heterocycle remain in the outer sphere. A hydride and a proton are transferred to these substrates by either a concerted or a stepwise path from catalysts such as Bullock s ionic hydrogenation catalysts, bifunctional catalysts in the tradition of Shvo and Noyori, and Stephan s frustrated Lewis pair catalysts. The outer-sphere pathways can use inexpensive metals and even non-metal catalysts, and lead to useful selectivity properties, particularly Noyori s asymmetric catalysis. ... 

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