Process for the amidation of esters or acids C - terminal peptide substrates for the synthesis of peptides in solution phase

摘要

The present invention relates to a process for the amidation of C-terminal esters or acids of peptide substrates in solution-phase synthesis of peptides, comprising amidating one or more peptide substrates comprising C-terminal esters or acids using the protease subtilisin in any suitable form in the presence of an ammonium salt derived from an acid having a pKa above 0. This process is useful in the production of protected or unprotected peptides.