Sanofi
Capping of unprotected amino groups during peptide synthesis

Abstract:

The present invention relates to a method for the synthesis of a polypeptide comprising a pre-determined amino acid sequence. The method according to the invention comprises coupling cycles of coupling an N-terminally protected amino acid building block C-terminally at an unprotected N-terminal amino group of an amino acid chain, wherein at least one coupling cycle comprises a coupling step (a), a capping step (b), and a de-protecting step (c).