Transfer Hydrogenation of Acyclic and Cyclic Imines

Hantzsch ester (2.2 equiv) to give p.y unsaturated a amino esters. Although the chemical yields were moderate, high enantio and trans selectivities were achieved using the same chiral phosphoric acid catalyst Ig. 

Cascade Transfer Hydrogenation of Quinoline and Pyridine Derivatives 

2 hydride addition to imines L with generation of the stereogenic center provides enantioenriched tetrahydroquinoline products. 

Rueping et al. further extended the method to the hydrogenation of 3 substituted 

Rueping and Antonchick developed an organocatalytic multiple cascade sequence 

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