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The selective deprotection of Nω-nitro-arginine derivatives represents a major preparative challenge. This problem can be circumvented by the use of catalytic hydrogenation, but often high pressure, elevated temperature, and/or long reaction times are needed. In certain cases hydrogenation is not suitable, for example, small-scale reactions, parallel synthesis, or due to selectivity issues. Herein,...
Biotinylated peptides often have low solubility in water. In this Letter, we describe a new method to synthesize a biotinylating reagent for water-solubilizing hydrophobic peptides. The biotinyl-6-aminohexanoic derivatives prepared contain a hydrophilic 3,6,9-trioxaundecanedioic acid linker moiety between the biotin and the peptide to improve the water solubility, and also to function as a spacer...
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