Oligomers of enantiopure bicyclic gamma/delta-amino acids (BTAa). 1. Synthesis and conformational analysis of 3-aza-6,8-dioxabicyclo

A series of dimeric through pentameric oligomers of a bicyclic gamma/delta-amino acid (BTG) were synthesized using peptide coupling methods in solution with PyBroP or HATU. The analysis of (1)H NMR and CD spectra suggests that these oligomers could have a partially ordered structure in alcohol solutions.