17-(cyclopropylmethyl)-4,5α-epoxy-3,14-dihydroxy-6β-(2-iodoacetamido)morphinan | 83339-86-0

• 分子结构分类: 有机化合物 - 苯类化合物 - 菲及其衍生物
• 英文名称: 17-(cyclopropylmethyl)-4,5α-epoxy-3,14-dihydroxy-6β-(2-iodoacetamido)morphinan
• 英文别名: 6β-N-(iodoacetyl)naltrexamine
• CAS: 83339-86-0
• 化学式: C₂₂H₂₇IN₂O₄
• 分子量: 510.372
• InChiKey: SRZBZWMDTZKTDO-HAOCKTTRSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.88
• 重原子数：
  29.0
• 可旋转键数：
  4.0
• 环数：
  6.0
• sp3杂化的碳原子比例：
  0.68
• 拓扑面积：
  82.03
• 氢给体数：
  3.0
• 氢受体数：
  5.0

反应信息

• 作为反应物：
  描述：

  L-半胱氨酸 、 17-(cyclopropylmethyl)-4,5α-epoxy-3,14-dihydroxy-6β-(2-iodoacetamido)morphinan 在 三甲胺 作用下， 以 甲醇 为溶剂， 反应 2.0h， 生成 6β-N-(cystein-S-ylacetyl)naltrexamine
  参考文献：
  名称：

  Possible contribution of a glutathione conjugate to the long-duration action of .beta.-funaltrexamine

  摘要：

  The fumaramate derivative of naltrexone, beta-funaltrexamine (beta-FNA), is a highly selective long-lasting mu opioid receptor antagonist that is active both in vitro and in vivo, presumably as a result of covalent binding to au receptor-based sulfhydryl group. Glutathione, which occurs in significant levels in brain and liver, was found to undergo a Michael-type reaction with beta-FNA in the test tube to give a stable conjugate 3 which occurred as an isomeric mixture. When tested in the GPI and MVD smooth muscle preparations, 3 was found to possess one-tenth the agonist activity of beta-FNA is both tissues, but showed no irreversible antagonist activity. The same result was found for the cysteine conjugate 4, except for some irreversible antagonism in the MVD. Both conjugates antagonize the antinociceptive effect of morphine in the mouse radiant heat tail-flick assay on icv administration. This antagonism persisted and actually increased over 24 h and generally paralleled the duration profile of beta-FNA. On sc administration, beta-FNA and 3 showed similar duration of antagonistic effect, while 4 exhibited only marginal activity at the early time interval. When the compounds are compared by the dose to produce equivalent antagonism, beta-FNA and 3 appeared equally effective and accessible by either route, whereas 4 showed a large difference between the two routes. It is possible that the ultra-long antagonism of the conjugates may result from their enzymatic conversion to beta-FNA in the central nervous system in view of the fact that conjugate 5, which cannot be converted to beta-FNA, did not produce antagonism of long duration in vivo. Alternatively, the protracted antagonism could arise from sequestration of 3 and 4 in tissue compartments that interface with mu opioid receptors.

  DOI：

  10.1021/jm00075a023
• 作为产物：
  描述：

  (5alpha,6beta)-6-氨基-17-(环丙基甲基)-4,5-环氧-吗喃-3,14-二醇 、 N-(iodoacetoxy)succinimide 以 四氢呋喃 、 异丙醇 为溶剂， 生成 17-(cyclopropylmethyl)-4,5α-epoxy-3,14-dihydroxy-6β-(2-iodoacetamido)morphinan
  参考文献：
  名称：

  Importance of carbon 6 chirality in conferring irreversible opioid antagonism to naltrexone-derived affinity labels

  摘要：

  A series of five epimeric pairs of naltrexone derivatives that contain an electrophilic substituent at the 6 alpha- or 6 beta-position was synthesized and tested on the guinea pig ileal longitudinal muscle (GPI) and mouse vas deferens (MVD) preparations in order to determine if the orientation of the electrophile is important for covalent bonding to opioid receptors. In the GPI all compounds were pharmacologically active as reversible agonists, but only the 6 beta-isomers of the fumaramate ester 2b (beta-FNA) and isothiocyanate 6b exhibited covalent reactivity, involving a selective irreversible antagonism of the mu agonist, morphine, without affecting kappa agonists. The 6 alpha-isomer 2a (alpha-FNA) was itself nonalkylating but was able to protect the GPI against alkylation by its epimer, beta-FNA, indicating that the two epimers bind to the same receptor. These results suggest that the proper orientation of the electrophilic substituent is required for covalent bonding with a proximal nucleophile in the case of mu receptor blockade. Moreover, the lack of covalent bonding to kappa receptors by these or other ligands in this series indicates the possible absence of sufficiently reactive nucleophiles on this recognition site. In the MVD, 2b, but not 2a, irreversibly antagonized morphine (as in GPI), whereas neither epimer exhibited irreversible antagonism toward the delta agonist, [D-Ala2,D-Leu5]enkephalin (DADLE). In contrast, both of the isothiocyanate epimers (6a,b) irreversibly blocked mu and delta receptors. Evidence suggesting differences between mu receptors in the MVD and GPI was obtained with the beta-iodoacetamide 5b, which was an irreversible blocker of morphine only in the MVD. When analyzed together with those of previous studies with the nitrogen mustard analogues, alpha- and beta-chlornaltrexamine, the data suggest that the receptor-alkylating ability of each isomer in an epimeric pair differs most when the electrophile possesses a narrow spectrum of reactivity.

  DOI：

  10.1021/jm00363a005