Enantioselective Synthesis of a Phenylalanine Library Containing Alkyl Groups on the Aromatic Moiety: Confirmation of Stereostructure by X-Ray Analysis
Unnatural aromaticaminoacids are useful tools in drug discovery, since their insertion in bioactive peptide sequences can change the sidechains spatial orientation, the backbone conformation and above all, their bioactivity. In this communication, we propose a straightforward method to synthesize 2′,6′‐dimethyl‐tyrosine and 2′,6′‐dimehylphenyl‐alanine derivatives as handling building blocks for