Self‐assembling bis‐dendritic peptides: design, synthesis and characterization of oxalyl‐linked bis‐glutamyl peptides [Glun(CO2Me)n+1‐CO‐]2; n = 1,3,7

Three generations of glutamic acid dendrons [Glu(n),(CO2Me)n + 1; n = 1, 3, 7] have been joined together head-to-head by an oxalyl unit to form highly sterically congested bis-Glu-dendritic peptides with gelling properties. The single crystal X-ray structure of the first generation bis-dendritic peptide showed an extended hydrogen-bonded chiral tape with modest nonlinear optical activity.