Structure-Activity Relationships of Dermorphin Analogues Containing Chiral Piperazin-2-one and Piperazine Derivatives.
作者:Tetsushi YAMASHITA、Eiji HATAMOTO、Hiroshi TAKENAKA、Yoshitane KOJIMA、Yutaka INOUE、Munekazu GEMBA、Masahide YASUDA
DOI:10.1248/cpb.44.856
日期:——
The amide and ester carbonyl groups of four pipierazin-2-one derivatives (N, N'-ethylene-bridged dipeptide ethyl esters) constructed from (R)- or (S)-phenylalanine and glycine were reduced with borane-tetrahydrofuran complex to produce the corresponding piperazine derivatives in 70-80% yields. These piperazin-2-one or piperazine derivatives were used as the carboxyl-terminal residues of eight dermorphin analogues (H-tyrosyl-D-alanyl-piperazin-2-one or piperazine derivatives) whose opiate activities were examined in vitro by use of the guinea pig ileum and the mouse vas deferens assays. It was found in the guinea pig ileum assay that the configuration of phenylalanine and the replacement of the piperazin-2-one ring with a piperazine ring are important for enhancing or reducing the opiate activities of these analogues.
由(R)-或(S)-苯丙氨酸和甘氨酸构建的四个哌嗪-2-酮衍生物(N,N'-乙烯桥联二肽乙酯)的酰胺和酯羰基用硼烷-四氢呋喃络合物还原,以70-80%的产率生成相应的哌嗪衍生物。这些哌嗪-2-酮或哌嗪衍生物被用作八种地吗啡类似物(H-酪氨酰-D-丙氨酰-哌嗪-2-酮或哌嗪衍生物)的羧基末端残基,通过豚鼠回肠和小鼠输精管测定法在体外检测了这些类似物的阿片活性。在豚鼠回肠测定中发现,苯丙氨酸的构象以及用哌嗪环取代哌嗪-2-酮环对于增强或降低这些类似物的阿片活性非常重要。