Progress of the reaction mechanism with 1 and

Nonclassical, because the reduction of a ketonic substrate takes place within the outer-sphere of the coordinatively saturated catalyst-complex, that is, without preliminary substrate coordination. This feature nicely 

Chart 1.3 Transition states proposed by Noyori and co-workers. 

It has been recently found, however, that there are a lot of experimental and theoretical inconsistencies with some of these elementary steps, as well as for the whole catalytic cycle involving (pre)catalysts 1201.25337 293 and 2. 3 2 3oo most important realization came from computational 

Likely in the mixture with presumably other products Morris Ref. [214,305] 

Similar experimental observations were made for the active form of (pre)catalyst and they are all in agreement that the reaction 

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