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- W1980128810 abstract "Abstract A two-step method is presented for the peptide-free, high-purity, and high-yield synthesis of Nα-Fmoc amino acids. The first step involves the preparation of stable dicyclohexylammonium–amino acid ionic adduct in acetone. Subsequently, the ionic adducts, on reaction with Fmoc-Nosu under mild alkaline conditions, give dipeptide-free Nα-Fmoc amino acids. The positive charge of the dicyclohexylammonium counterion in the ionic salt has a longer radius, moderating the nucleophilicity of the carboxylate ion of the amino acid and preventing by-products by arresting the formation of mixed anhydrides, the precursors of oligopeptide impurities." @default.
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- W1980128810 date "2009-05-07" @default.
- W1980128810 modified "2023-09-23" @default.
- W1980128810 title "Efficient Procedure for the Preparation of Oligomer-Free Nα-Fmoc Amino Acids" @default.
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- W1980128810 doi "https://doi.org/10.1080/00397910802632563" @default.
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