申请人:Parke, Davis & Company
公开号:US04031069A1
公开(公告)日:1977-06-21
New tetrapeptides having the formula A-R.sub.1 -Ser(benzyl)-Tyr(benzyl)-R.sub.2 -R.sub.3 wherein A is t-butoxycarbonyl, cyclohexylcarbonyl, benzyloxycarbonyl and p-nitrobenzyloxycarbonyl; R.sub.1 is L-Trp, L-Thr(benzyl), L-Met or Gly; Ser(benzyl) is D-Ser(benzyl) or L-Ser(benzyl); Tyr(benzyl) is D-Tyr(benzyl) or L-Tyr(benzyl); R.sub.2 is D-Ala, .beta.-Ala, D-Leu or D-Val; and R.sub.3 is lower alkoxy, hydrazino, amino, lower alkylamino or di(lower alkyl)amino.
新的四肽具有以下公式:A-R.sub.1-Ser(苄基)-Tyr(苄基)-R.sub.2-R.sub.3,其中A为叔丁氧羰基,环己基羰基,苄氧羰基和对硝基苄氧羰基;R.sub.1为L-Trp,L-Thr(苄基),L-Met或Gly;Ser(苄基)为D-Ser(苄基)或L-Ser(苄基);Tyr(苄基)为D-Tyr(苄基)或L-Tyr(苄基);R.sub.2为D-Ala,β-Ala,D-Leu或D-Val;R.sub.3为较低的烷氧基,肼基,氨基,较低烷基氨基或二(较低烷基)氨基。