Orthogonal side chain protecting groups, particularly for Fmoc-based solid phase peptide synthesis, are growing not only in diversity, but also in popularity. These protecting groups enable post-synthesis chemistry while the peptide is still on resin, often times increasing efficiency, decreasing side reactions, and generally simplifying the overall process.
I’ve already done some work with many of the commercially available orthogonally protected amino acids including allyl and alloc, Acm, and ivDde for a variety of downstream applications. In today’s post, I’ll discuss some work optimizing the removal of a 4-methoxytrityl (Mmt) group from cysteine side chains.
Continue reading How to: Measure and optimize the removal of Mmt protecting groups