Summary
Although fluoride-labile protecting groups and linkers have been developed in solid-phase peptide synthesis to add an extra level of orthogonality, fluoride ions were found to convert α-peptides to their corresponding γ- or β-peptides in Glu(OtBu)- and Asp(OtBu)-containing peptidyl resins. Different peptide sequences and fluoride reagents were examined to determine the scope of this side reaction. CZE analysis was found to be a useful analytical technique to characterize peptides with respect to this phenomenon.
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Kates, S.A., Albericio, F. Rearrangement of Glu(OtBu)- and Asp(OtBu)-containing peptides upon fluoride treatment in solid-phase synthesis. Lett Pept Sci 1, 213–220 (1995). https://doi.org/10.1007/BF00127267
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DOI: https://doi.org/10.1007/BF00127267