The invention relates to the preparation of biologically active polypeptides containing the aspartyl group, particularly an aspartyl-glycine moiety, using the active-ester technique. According to the method of the invention, human adrenocorticotropic hormone and its fragments characteristic to the individual species, as well as the blocked derivatives of such compounds are prepared by the pentafluorophenol method, i.e., the carboxy group of the acylating component is activated by converting it into pentafluorophenyl ester in the coupling reaction carried out with blocked peptides containing the aspartyl group or an aspartylglycine moiety. The acylation is carried out preferably using equimolar quantities of the respective reactants. The free peptides obtained after removing the blocking groups can be converted into their acid addition salts or pharmaceutically acceptable complexes or condensates. Human adrenocorticotropic hormone and its derivatives are valuable substances of therapeutical activity.
本发明涉及利用活性
酯技术制备含有
天冬氨酸基团的
生物活性
多肽,特别是含有
天冬氨酸-甘
氨酸基团的
多肽。根据本发明的方法,利用
五氟苯酚法制备人类
肾上腺皮质激素和其特征性物种的片段,以及这些化合物的阻断衍
生物。即,在与含有
天冬氨酸基团或
天冬氨酸-甘
氨酸基团的阻断肽进行偶联反应时,通过将酰化组分的羧基转化为
五氟苯酰
酯来激活酰化组分的羧基。最好使用相应反应物的等摩尔量进行酰化。去除阻断基后获得的自由肽可以转化为其酸加合盐或药理学可接受的复合物或缩合物。人类
肾上腺皮质激素及其衍
生物是具有治疗活性的有价值的物质。