Abstract
Diphenylphosphoryl azide (DPPA) mediated one-pot synthesis of N α-Fmoc/Bsmoc/Boc/Z-protected ureidopeptides and peptidyl ureas as well as phenyl/succinimidyl ( N α-urethane protected) methyl carbamates starting from N α-protected amino acids is reported. The formation of an azide, its rearrangement and coupling with an amino component is accomplished in a sequence of one-pot operations. The protocol has incorporated urea linkages in a sterically hindered peptide.
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