The protected dodecapeptide, Z-Arg (NO2)-Pro-Asp (OBzl)-Phe-Cys (Bzl)-Leu-Glu-(OBzl)-Pro-Pro-Tyr-Thr-Gly-OH, corresponding to positions 1 to 12 of the basic trypsin inhibitor from bovine pancreas (Kunitz and Northrop) was synthesized. The synthesis was achieved by condensation of three peptide subunits, Z-Arg (NO2)-Pro-OH, Z (OMe)-Asp (OBzl)-Phe-Cys (Bzl)-Leu-Glu (OBzl)-Pro-OH and H-Pro-Tyr-Thr-Gly-OH with pentachlorophenyl trichloroacetate.
受保护的十二肽,Z-Arg (
NO2)-Pro-Asp (OBzl)-Phe-Cys (Bzl)-Leu-Glu-(OBzl)-Pro-Pro-Tyr-Thr-Gly-OH,对应于位置 1 至从牛胰腺(Kunitz 和 Northrop)合成了 12 种碱性胰蛋白酶抑制剂。该合成是通过三个肽亚基缩合实现的,Z-Arg ( )-Pro-OH、Z (OMe)-Asp (OBzl)-Phe-Cys (Bzl)-Leu-Glu (OBzl)-Pro-OH 和H-Pro-Tyr-Thr-Gly-OH 与
三氯乙酸五氯苯酯。