Solid-phase peptide synthesis without side-chain hydroxyl protection of threonine. 1991

P M Fischer, and K V Retson, and M I Tyler, and M E Howden
Deakin Research Ltd., University of Western Sydney, Richmond, NSW, Australia.

A peptide containing four threonine residues was synthesised by the solid-phase method using fluorenyl-methoxycarbonylamino acid reactive esters or coupling by preactivation with 1-hydroxybenzotriazole and Castro's reagent. In two separate experiments the synthesis was carried out with or without protection of the side-chain hydroxyl group of threonine as the tert.-butyl ether. Comparison of the crude peptides after deprotection and detachment from the synthesis resin suggests that side-chain protection of threonine is unnecessary under the synthetic conditions employed.

UI MeSH Term Description Entries
D009842 Oligopeptides Peptides composed of between two and twelve amino acids. Oligopeptide
D013912 Threonine An essential amino acid occurring naturally in the L-form, which is the active form. It is found in eggs, milk, gelatin, and other proteins. L-Threonine,L Threonine

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