Process for the manufacture of peptides which contain more than one disulphide bond characterized in that in one or two aminoacid sequences containing cysteine, in which disulphide bonds are to be produced, two cysteine radicals which are to be linked are protected by a mercapto-protective group R.sub.1 of the aralkyl type, two further cysteine radicals are protected by an acylaminomethyl group R.sub.2, the protective groups R.sub.1 are removed by treatment with iodine in the presence of a polyhalogenated lower aliphatic hydroxy compound or oxo compound, or a corresponding lower alkanoic acid lower alkyl ester, at the same time forming the disulphide bond between these cysteine radicals, which are protected by R.sub.1, and at any desired point after removal of the polyhalogenated compound the second disulphide bridge is formed in the usual manner.
含有多个二
硫键的肽的制造过程的特点在于,在含有半胱
氨酸的一个或两个
氨基酸序列中,其中要产生二
硫键,两个要连接的半胱
氨酸基团由苯基烷基保护基R.sub.1保护,另外两个半胱
氨酸基团由酰胺甲基基团R.sub.2保护,通过在多卤代低级脂肪羟基化合物或氧化合物或相应的低级烷基酸低级酯存在下用
碘处理来去除保护基R.sub.1,同时在这些由R.sub.1保护的半胱
氨酸基团之间形成二
硫键,在去除多卤代化合物后的任何所需点上,第二个二
硫桥以通常的方式形成。