Here we describe a rapid and efficient solid-phase synthesis of a 29-mer cy
clic antibacterial peptide 1, currently under pharmaceutical development. T
he linear peptide was assembled by standard Fmoc chemistry on an Fmoc-Asp(r
esin)-ODmab carrier. Intramolecular on resin head-to-tail cyclization was e
nabled after selective deprotection of the Asp alpha-carboxy protecting gro
up with 2% hydrazine-DMF at room temperature. (C) 2000 Elsevier Science Ltd
. All rights reserved.