[Dea]

Hello everyone,

I start with a peptide coupling between L-Boc-Proline and Glycine methyl ester HCl. Then I do a Boc removal in F₃C-COOH, in order to obtain a cyclic dipeptide. After 1 h in F₃C-COOH and solvent removal, I dissolve the mixture in methanol and add NEt₃. While adding NEt₃, my solution starts getting pink and in the end, light purple. Why is this happening to me?! 
Ok, enough drama, it´s not affecting the reaction, just wanted to know.