摘要:
AbstractAla1‐Ala6‐Arg8‐vasopressin, Ala1‐Ala6‐Lys8‐vasopressin, (Deamino‐Ala)1‐Ala6‐Arg8‐vasopressin and (Deamino‐Ala)1‐Ala6‐Lys8‐vasopressin were prepared by condensation of a tripeptide azide or, respectively, a propionyl‐dipeptide azide with a hexapeptide amide, both fragments having been synthesized by methods excluding racemization. These peptides represent analogues of arginine‐vasopressin, lysinevasopressin and of their deamino derivatives, in which the ring is open and the sulphur atoms are replaced by hydrogen atoms. The new peptides were found to be devoid of any biological activity and did not inhibit the corresponding natural hormones. The significance of this observation is discussed.