the synthesis of novel aromatic substituted, bulky and hydrophobic tryptophanderivatives has been developed. Asymmetric hydrogenations of α-enamide 5 using Burk's DuPHOS-based catalysts generated high enantiomerically pure d- and l-α-amino acid derivatives 6, which subsequently underwent Suzuki cross couplings with boronic acid derivatives to afford aromatic substituted tryptophanderivatives 7 and