The present invention relates to a novel processes for commercial production of pharmaceutical grade octreotide using classical solution phase peptide synthesis in high yield and purity and using inexpensive amino acid derivatives. Thus the protected octapeptide alcohol Boc -D- Phe - Cys (Trt)-Phe -D - Trp - Lys (Boc) - Thr - Cys (Trt) - Thr - OL is prepared by condensation of hexapeptide acid Boc -D - Phe - Cys (Trt)-Phe -D - Trp - Lys (Boc) - Thr - OH with dipeptide alcohol H- Cys (Trt) - Thr - OL. The hexapeptide Boc -D- Phe - Cys (Trt)-Phe -D - Trp - Lys (Boc) - Thr - OMe is prepared by condensing Boc - D - Phe - Cys (Trt) - OH with tetrapeptide H-Phe -D - Trp - Lys (Boc) - Thr - OMe followed by hydrolysis. The linear octapeptide alcohol is treated with cocktail mixture TFA /water/ TIS (9.0:0.5:0.25), in one step removes the Trt and Boc groups, followed by oxidation with hydrogen peroxide to affords octreotide.
本发明涉及一种新的工艺,用于使用廉价的
氨基酸衍
生物,通过高产率和纯度的经典溶液相肽合成制备药品级别的
奥曲肽。因此,通过六肽酸Boc-D-Phe-Cys(Trt)-Phe-D-Trp-Lys(Boc)-Thr-OH与二肽醇H-Cys(Trt)-Thr-OL的缩合反应,制备保护的八肽醇Boc-D-Phe-Cys(Trt)-Phe-D-Trp-Lys(Boc)-Thr-Cys(Trt)-Thr-OL。通过将Boc-D-Phe-Cys(Trt)-OH与四肽H-Phe-D-Trp-Lys(Boc)-Thr-OMe缩合反应,然后进行
水解,制备六肽Boc-D-Phe-Cys(Trt)-Phe-D-Trp-Lys(Boc)-Thr-OMe。将线性八肽醇与混合物TFA /
水/ TIS(9.0:0.5:0.25)处理一步去除Trt和Boc基团,然后用
过氧化氢氧化制得
奥曲肽。