Compounds of formula (I) or formula (II) have dopaminergic activity: wherein: R1 is a carboxyl, carboxyl ester, or carboxamide group; R2 is a group —C(═O)—NR3R4, or —S(═O)2—NR3R4; R3 and R4 are independently selected from hydrogen, optionally substituted C1-C6 alkyl, (C1-C5 fluoroalkyl)-CH2—, -Q, and —CH2Q, wherein Q is an optionally substituted monocyclic carbocyclic or heterocyclic ring of (3) to (6) ring atoms; or R3 and R4 together with the nitrogen to which they are attached form an optionally substituted monocyclic cycloalkyl or non-aromatic heterocyclic ring of (3) to (8) ring atoms; R5 is hydrogen, or a natural or non-natural alpha amino acid residue linked via a peptide bond; R6 is hydrogen or a group R7C(═O)—; and R7 is C1-C6 alkyl, C1-C6 fluoroalkyl or cyclopropyl.
式(I)或式(II)的化合物具有
多巴胺能活性,其中:R1是羧基、羧酯基或羧酰胺基;R2是基团-C(═O)-NR3R4或-S(═O)2-NR3R4;R3和R4独立地选自氢、可选地取代的C1-C6烷基、(C1-C5氟烷基)-
CH2-、-Q和- Q,其中Q是(3)到(6)环原子的可选取代的单环芳碳环或杂环;或者R3和R4与它们连接的氮一起形成一个(3)到(8)环原子的可选取代的单环环烷基或非芳香杂环;R5是氢或通过肽键连接的天然或非天然α
氨基酸残基;R6是氢或基团R7C(═O)-;R7是C1-C6烷基、C1-C6氟烷基或环丙基。