Racemization studies of Fmoc-Cys(Trt)-OH during stepwise Fmoc-Solid phase peptide synthesis

Add time:07/17/2019    Source:sciencedirect.com

In conventional stepwise Fmoc solid phase peptide synthesis, diisopropylethylamine (DIEA) base-catalyzed acylation methods lead to considerable amounts of racemization of Fmoc-Cys(Trt) residues during the activation/coupling process. The epimerization can be reduced to a negligible degree, via a base-free activation step.

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