For the classical solution synthesis of human epidermal growth factor (h-EGF), four protected peptide derivatives, Boc-Lys(Cl-Z)-Trp-Trp-Glu(OcHex)-Leu-Arg(Tos)-OBzl (5), Boc-Glu(OcHex)-Arg(Tos)-Cys(MeBzl)-Gln-Tyr(Br-Z)-Arg(Tos)-Asp(OcHex)-Leu-OH (13), Boc-Tyr(Br-Z)-Ile-Gly-OH (16), and Boc-Cys(MeBzl)-Asn-Cys(MeBzl)-Val-Val-Gly-OH (22) were synthesized to build up the sequence corresponding to 31–53.