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The synthesis of peptide and small molecule hydroxamic acids utilising SynPhase™ crowns is demonstrated. A hydroxylamine trityl linker is generated from chlorotrityl derivatised Synphase™ crowns by reaction with N-hydroxyphthalimide followed by subsequent deprotection. The loading of hydroxylamine crowns is quantified spectrophotometrically by measuring phthalhydrazide absorbance at 346 nm.
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