Synthesis of thyrotropin-releasing hormone analogs with selective central nervous system effects
作者:Ruth F. Nutt、Frederick W. Holly、Carl Homnick、Ralph Hirschmann、Daniel F. Veber、Byron H. Arison
DOI:10.1021/jm00138a010
日期:1981.6
Thyrotropin-releasing hormone (TRH) analogues which show relative selectivity for action in the central nervous system have been recognized. Practical syntheses for three of these TRH analogues which show the greatest selectivity, less than Aad-His-Tzl-NH2 (5), less than Glu-His-Pip-OMe (2), and less than Aad-His-Pro-NH2 (6), are described. The first two were prepared by solution methods of peptide
促甲状腺激素释放激素(TRH)类似物在中枢神经系统中显示出相对的选择性。三种TRH类似物的实用合成物显示出最高的选择性,低于Aad-His-Tzl-NH2(5),低于Glu-His-Pip-OMe(2)和低于Aad-His-Pro-NH2 (6),有描述。前两种是通过肽合成的溶液方法制备的。通过固相方法制备化合物6。为了获得最佳收率,组氨酸外消旋化,容易的二酮哌嗪形成和酰化的噻唑烷羧酸衍生物在酸性条件下的不稳定性问题已被最小化。已检查了诸如pK,NMR位移和圆二色性等物理性质,因为它们可能与生物学活性和肽构象有关。