Chiral diamines, such as 1,2-diphenylethylenediamine (DPEN), have been used as proline analogues in aminocatalysis. They are effective in promoting asymmetric transformations, particularly in reactions involving imines and enones.
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(2S)-2-[(1'R)-1',2'-dibenzyloxyethyl]-pyrrolidine
N-cyclohexyl-2-(5-methoxy-2-p-tolyl-1H-benzo[d]imidazol-1-yl)butanamide
6-methyl-2-(o-tolyl)-1H-benzo[d]imidazole
N,N'-1,3-bisphenylmethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone
