Synthesis and biological evaluations of novel endomorphin analogues containing α-hydroxy-β-phenylalanine (AHPBA) displaying mixed μ/δ opioid receptor agonist and δ opioid receptor antagonist activities
作者:Miao Hu、Marc A. Giulianotti、Jay P. McLaughlin、Jiaan Shao、Ginamarie Debevec、Laura E. Maida、Phaedra Geer、Margaret Cazares、Jaime Misler、Ling Li、Colette Dooley、Michelle L. Ganno、Shainnel O. Eans、Elisa Mizrachi、Radleigh G. Santos、Austin B. Yongye、Richard A. Houghten、Yongping Yu
DOI:10.1016/j.ejmech.2014.12.049
日期:2015.3
endomorphin-2 (EM-2) analogues was synthesized, incorporating chiral α-hydroxy-β-phenylalanine (AHPBA), and/or Dmt1-Tic2 at different positions. Pharmacological activity and metabolic stability of the series was assessed. Consistent with earlier studies of β-amino acid substitution into endomorphins, multiple analogues incorporation AHPBA displayed high affinity for μ and δ opioid receptors (MOR and DOR,
合成了一系列新的内啡肽-1(EM-1)和内啡肽-2(EM-2)类似物,在不同位置掺入了手性α-羟基-β-苯丙氨酸(AHPBA)和/或Dmt 1 -Tic 2。评估了该系列的药理活性和代谢稳定性。与早期将β-氨基酸置换为内啡肽的研究一致,在放射性配体竞争结合试验中,多种掺入AHPBA的类似物对μ和δ阿片受体(分别为MOR和DOR)表现出高亲和力,并且在大鼠脑膜匀浆中的稳定性增加,特别是Dmt-Tic-(2R,3S)AHPBA-Phe-NH2(化合物26)。脑室内(icv)给药在小鼠55°C温水抽尾试验中产生了26种抗伤害感受性(ED 50值(和95%置信区间)= 1.98(0.79–4.15)nmol,icv),等同于吗啡(2.35 (1.13-5.03)nmol,icv),但除非选择性阿片类激动剂外,还表现出DOR选择性拮抗作用。26的抗伤害感受没有运动活性或急性抗伤害感受性耐受性。这类新
Regio- and stereoselective ring-opening of chiral 1,3-oxazolidin-2-one derivatives by organocopper reagents provides novel access to di-, tri- and tetra-substituted alkene dipeptide isosteresElectronic supplementary information (ESI) available: synthetic procedures and characterization for 4a,b, 5a,b, 7b, 8a,b, 9a,b, 10b, 11a,b, 12b,c, 13b, 14a,b, 15, 16a,b, 17a,b, 18, 19b, 20b. See http://www.rsc.org/suppdata/p1/b2/b203482d/
作者:Shinya Oishi、Ayumu Niida、Takae Kamano、Yoshihisa Miwa、Tooru Taga、Yoshihiko Odagaki、Nobuyuki Hamanaka、Mikio Yamamoto、Keiichi Ajito、Hirokazu Tamamura、Akira Otaka、Nobutaka Fujii
DOI:10.1039/b203482d
日期:2002.7.26
Organocopper-mediated alkylation of β-(
N-Boc-2-oxo-1,3-oxazolidin-5-yl)-α,β-enoates has been intensively investigated. Alkylation proceeded regio- and stereoselectively by
anti-
SN2′ ring-opening to provide a new route to the synthesis of
ψ[(
E)-CHCH]-,
ψ[(
E)-CMeCH]- and
ψ[(
E)-CMeCMe]- type alkene dipeptide isosteres from chiral amino acid derivatives. These resulting agents are potential mimetics of type II and type II′
β-turn substructure.
有机铜介导的β-(N-Boc-2-氧代-1,3-嗯唑烷-5-基)-α,β-烯酸酯的烷基化反应已被深入研究。通过反式-SN2'环开裂,烷基化反应在区域选择性和立体选择性上进行,为从手性氨基酸衍生物合成ψ[(E)-CHCH]-、ψ[(E)-CMeCH]-和ψ[(E)-CMeCMe]-型烯丙二肽类似物提供了一条新途径。这些合成的试剂是潜在的II型和II'型β-转角结构域模拟物。