Abstract

The chemoselective incorporation of phosphoramidate moieties into peptides by a Staudinger-phosphite reaction of azides can be performed in many solvents, including water. In this report, we present two strategies for an efficient synthesis of phosphoramidate-containing peptides, in which the Staudinger-phosphite reaction is performed either on the solid support or in solution with aryl azido-containing peptides. The corresponding Staudinger reactions proceed in high conversion rates and deliver phosphoramidate peptides, in which the modification site is located in the middle of the peptide sequence.

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