Design, Synthesis, X-ray Analysis, and Dopamine Receptor-Modulating Activity of Mimics of the "C5" Hydrogen-Bonded Conformation in the Peptidomimetic 2-Oxo-3(R)-[(2(S)-pyrrolidinylcarbonyl)amino]-1-pyrrolidineacetamide
作者:Paul W. Baures、William H. Ojala、William B. Gleason、Ram K. Mishra、Rodney L. Johnson
DOI:10.1021/jm00048a003
日期:1994.10
X-ray crystallographic determination of 2 and methyl 3(R)-[1-(2,5-dioxopyrrolidino[3,4-c]piperazino)]-2-oxo-1- pyrrolidineacetate (11), a diketopiperazine intermediate in the synthesis of 3. These analogs were tested for their ability to enhance the binding of the dopamine D2 receptor agonist N-propylnorapomorphine (NPA) in the absence and presence of 5'-guanylylimidodiphosphate (Gpp(NH)p). Both compounds
3(R)-(7a(S)-六氢-1-氧代-3,3-二甲基-1H-吡咯并[1,2-c]咪唑-2-基)-氧-1-吡咯烷-乙酰胺(2)设计和制备了3(R)-[1-(2,5-二氧杂吡咯烷酮[3,4-c]哌嗪子]]-2-氧-1--1-吡咯烷乙酰胺(3),以模拟“ C5”氢键在2-氧代-3(R)-[((2(S)-吡咯烷基羰基)氨基] -1-吡咯烷乙酰胺(1)的晶体结构中发现该结构。两种化合物都有效地将psi 1扭转角限制在非常接近1的X射线结构中的值,如X射线晶体学测定2和甲基3(R)-[1-(2,5-二氧杂吡咯烷酮)所见[3,4-c]哌嗪子] -2-氧代-1-吡咯烷乙酸酯(11),是合成3时的二酮哌嗪中间体。测试了这些类似物在不存在和存在5'-鸟苷二磷酸酯(Gpp(NH)p)的情况下增强多巴胺D2受体激动剂N-丙基诺哌吗啡(NPA)结合的能力。两种化合物都通过增加激动剂的结合亲和力和可用于结合的高亲和