hydrogen/deuterium exchange (H/D exchange) of cross-linkable α-amino acid derivatives with deuteratedtrifluoromethanesulfonicacid (TfOD). H/D exchange with TfOD was easily applied to o-catechol containing phenylalanine (DOPA) within an hour. A partial H/D exchange was observed for trifluoromethyldiazirinyl (TFMD) phenylalanine derivatives. N-Acetyl-protected natural aromatic α-amino acids (Tyr and Trp)
Photoreactive benzoylphenylalanines and related peptides
申请人:E. I. Du Pont de Nemours and Company
公开号:US04762881A1
公开(公告)日:1988-08-09
Provided is a benzoylphenylalanine of the formula: ##STR1## wherein ##STR2## is in the m or p position; and Pr is a protecting group which is easily cleavable in the presence of a peptide bond by a mild acid or base. This benzoylphenylalanine group is incorporated into a peptide chain which can be attached to a solid substrate having a reactive hydrogen by exposure to low energy ultraviolet light.
Simple and Stereocontrolled Preparation of Benzoylated Phenylalanine Using Friedel–Crafts Reaction in Trifluoromethanesulfonic Acid for Photoaffinity Labeling
Simple and stereocontrolled preparation of benzoylated phenylalanine derivatives from optically pure phenylalanine using Friedel‒Crafts reaction in trifluoromethanesulfonic acid (TfOH) is reported; these derivatives are useful for photoaffinity labeling. Protected or unprotected phenylalanine derivatives were converted to benzoyl derivatives in TfOH at room temperature in a short time without loss of optical