An Fmoc Compatible, O to S Shift-Mediated Procedure for the Preparation of C-Terminal Thioester Peptides
The Journal of Organic Chemistry2013Vol. 78(19), pp. 9848–9856
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Abstract
We report a practical 2-hydroxy-3-mercapto-propionic acid (Hmp)/2-methylpiperidine (2-MP) based Fmoc chemistry procedure to prepare the C-terminal Hmp peptides, which serve as the precursors of C-terminal thioester peptides. The subsequent O to S acyl shift and thiol-exchange mediated thioester conversion of the crude precursor peptides can be accomplished smoothly under mild conditions to provide the desired thioester peptides with good yield and high quality. This is a highly adaptable approach, and we envision its broad application in the preparation of C-terminal thioester peptides.
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