Backbone protection has been shown to increase the efficiency of stepwise chain assembly for the solid phase synthesis (SPPS) of certain aggregating peptides. 1 Backbone modification has also been shown to enhance the solubility of sparingly soluble peptides by disrupting H-bond driven aggregation, and thus disfavoring the aggregated state. 2–4 Because beta-sheet formation is mediated by inter-strand hydrogen bonding between the backbone carbonyl oxygen ...