Synthesis and some pharmacological properties of five analogs of oxytocin having L-homocysteine in position 6
作者:Clark W. Smith、Martha F. Ferger
DOI:10.1021/jm00224a010
日期:1976.2
Five analogs of oxytocin have been synthesized with a homocysteine residue in position 6 and 2-, 3-, or 4-carbon residues in position 1. The compounds, which contain 20-, 21-, and 22-membered disulfide rings, respectively, were [1-alpha-mercaptoacetic acid,6-homocysteine]oxytocin, [6-homocysteine]oxytocin, [1-beta-mercaptopropionic acid,6-homocysteine]oxytocin, [1,6-homocystine]oxytocin, and [1-gamma-mercaptobutyric
已合成了催产素的五个类似物,在位置6处具有同型半胱氨酸残基,在位置1处具有2、3或4个碳原子残基。这些化合物分别含有20、21和22元二硫键分别是[1-α-巯基乙酸,6-高半胱氨酸]催产素,[6-β-巯基丙酸],[1-β-巯基丙酸,6-高半胱氨酸]催产素,[1,6-高半胱氨酸]催产素和[1-γ -巯基丁酸,6-高半胱氨酸]催产素。通过肽合成的固相方法制备适当的被保护的多肽中间体。通过在NH3中用Na处理除去保护基,并通过在MeOH水溶液中用ICH2CH2I氧化形成二硫键。通过分配色谱法随后通过凝胶过滤进行纯化。据报道,这五种类似物的药理活性可用于催产药,禽血管降压药和大鼠加压药测定。与催产素相比,这些类似物表现出急剧降低的激动剂效力,并且一些表现出拮抗活性。