申请人:Richter Gedeon Vegyeszeti Gyar RT
公开号:US04339440A1
公开(公告)日:1982-07-13
The invention relates to new enkephalin analogues of the general formula (I), Tyr-X-Gly-Phe-Y (I) wherein Tyr, Gly and Phe represent L-tyrosyl, glycyl and L-phenylalanyl residue, respectively, X is glycyl residue or a D-.alpha.-aminocarboxylic acid residue with a lower alkyl, lower thioalkyl or phenyl-(lower)-alkyl side chain, and Y is the residue of an L, D or DL-.alpha.-aminophosphonic acid or L, D or DL-.alpha.-aminosulfonic acid, each having a lower alkyl side chain, and salts thereof. These compounds are prepared according to the invention so that an L-, D- or DL-.alpha.-aminophosphonic acid or an L-, D- or DL-.alpha.-aminosulfonic acid, each bearing a lower alkyl side chain, is coupled in the proper order, as defined by formula (I), with the amino acids and/or peptide fragments each having a removable protecting group on the terminal amino group, the protecting group is split off from the terminal amino group, and the free peptide is isolated as such or in the form of its salt. The new compounds according to the invention selectively modify the catecholamine content of the central nucleus of amygdala, thus they may specifically influence the following functions: food intake, emotionality, social behavior, learning and memory processes.
该发明涉及一般式(I)的新的脑啡肽类似物,其中Tyr、Gly和Phe分别代表L-酪氨酰基、甘氨酰基和L-苯丙氨酰基残基,X是甘氨酰基或具有较低烷基、较低硫代烷基或苯基-(较低)-烷基侧链的D-α-氨基羧酸残基,Y是具有较低烷基侧链的L、D或DL-α-氨基膦酸或L、D或DL-α-氨基磺酸残基,以及它们的盐。根据该发明制备这些化合物,使得L、D或DL-α-氨基膦酸或L、D或DL-α-氨基磺酸,每个带有较低烷基侧链,按照式(I)所定义的正确顺序与氨基酸和/或肽段偶联,每个具有可去保护基的末端氨基团,保护基从末端氨基团上脱落,游离肽被单独分离或以其盐的形式存在。根据该发明的新化合物选择性地修改杏仁核中枢的儿茶酚胺含量,因此它们可能特异地影响以下功能:食物摄入、情绪、社会行为、学习和记忆过程。