Abstract
We have developed and acid/base stable aryl hydrazide linker which is readily coupled to solid phase resins. Cleavage is specific and facile, requiring a copper (II) catalyst, base and a nucleophile to proceed. The conditions are compatible with all 20 proteinogenic amino acids and quantitative cleavage is achieved within 2 hours at 20°C to give peptides with C-terminal acid, amide or ester functionalities. Aryl hydrazides also offer scope as simple “traceless” linkers.
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