The application of an aryl hydrazine linker prevents ß‐elimination side products in the SPPS of C‐terminal cysteine peptides

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Abstract

Solid-phase synthesis allows for the preparation of some complex cysteine-containing peptides with both a high yield and purity. However, side reactions during chain elongation such as modification of amino acid residues have been found in C-terminal cysteine peptides. We identified 3-(1-piperidinyl)-alanine peptides, corroborated the mechanism of the side reaction, and introduced an efficient approach for the Fmoc-based synthesis of C-terminal cysteine peptides using an aryl hydrazine linker.

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