Thallium(III) trifluroacetate cleaves various S-protecting groups of cysteine in trifluoroacetic acid forming cystine; as examples, three model peptides, oxytocin, urotensin II, and a human calcitonin gene-related peptide, were prepared by direct oxidative conversion of the respective S-substituted cysteine-peptides.
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Journal of the Chemical Society, Chemical Communications
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