Studies on 2-Aziridinecarboxylic Acid. VII. Formation of Dehydroamino Acid PeptidesviaIsomerization of Peptides Containing 2-Aziridinecarboxylic Acid by Tertiary Amines
A visible light-initiated method has been developed for preparation of Se−S bond-containing peptides. The method is based on generation of sulfur-centered radical employing organic dye. The protocol is tolerant to unprotected peptides with “sensitive” amino acids. The stability of Se−S bond is evaluated in buffers at different pH (3.0–10.0) and also in the presence of oxidants and reducing agents.
radical via visible light-initiated reaction in the presence of transition metal-free photocatalyst. The selenium radical is further oxidized to an electrophile and trapped by N-heterocycles. The mechanism is confirmed by NMR, HRMS, UV, EPR and cyclic voltammetry (CV) experiments and photocatalyst emission quenching studies. A visible light-initiated reaction is employed for the synthesis of selen
Oxazoline derivatives were mainly obtained from the O-tosyl-N-acyl-β-hydroxy amino acid peptides by β-elimination reaction. Dehydroalanine or hydantoin derivatives were isolated when the urethane type acyl groups were used.