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An optimized and broadly applicable procedure for the solid-phase synthesis of primary amines and carbamates via Curtius-degradation of carboxylic acids has been developed. The targeted primary amines and carbamates were obtained in excellent purity and high overall yields.
A novel linkage for the solid-phase synthesis of hydroxamic acids is described. The linkage is stable to all reagents commonly used in Fmoc peptide synthsis. Cleavage is induced by treatment with trifluoroacetic acid, providing hydroxamic acids in high purity and good yields.
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