The p-nitrophenyl ester of N-benzylglycine and N-(2-aminoethyl)-1,3-propane diamine are reacted in the same proportions as in (A) above but in dimethyl formamide as the solvent to yield, after working up in a similar manner, N-(N-benzylglycyl)-N-[2-(benzylaminoacetamido)-ethyl]-3-(benzylaminoacetamido)-propylamine in 65% yield, δ(d6DMSO) 1.6 (m, 2H), 3.2 (m, 6H), 3.5 (d, 4H), 3.8 (d, 2H), 5.0 (s, 6H), 7.3 (s, 15H), 7.4 (m, 3H), 7.8 (m, 3H). Hydrogenation as in (A) above yields the title compound in 75% yield as an oil.
