cyclo- | 127819-96-9

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: cyclo-
• 英文别名: cyclo(D-Trp-Ile-D-Pip-Pip-D-His-Pro)；L-366,682；cyclo[D-His-Pro-D-Trp-Ile-D-Pip-Pip]；(1R,8S,11R,17S,20R,23S)-23-[(2S)-butan-2-yl]-11-(1H-imidazol-5-ylmethyl)-20-(1H-indol-3-ylmethyl)-3,10,13,19,22,25-hexazatetracyclo[23.4.0.03,8.013,17]nonacosane-2,9,12,18,21,24-hexone
• CAS: 127819-96-9
• 化学式: C₄₀H₅₃N₉O₆
• 分子量: 755.918
• InChiKey: WCNGAVKBHXZVJO-JRNXVZILSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.9
• 重原子数：
  55
• 可旋转键数：
  6
• 环数：
  7.0
• sp3杂化的碳原子比例：
  0.57
• 拓扑面积：
  193
• 氢给体数：
  5
• 氢受体数：
  7

制备方法与用途

L-366682是一种环六肽，具有催产素拮抗作用。

反应信息

• 作为产物：
  描述：

  H-D-Trp-Ile-D-Pip-Pip-D-His-Pro-NH-NH2 在 盐酸 、 N,N-二异丙基乙胺 、 亚硝酸异戊酯 作用下， 生成 cyclo-
  参考文献：
  名称：

  Use of N-Fmoc amino acid chlorides and activated 2-(fluorenylmethoxy)-5(4H)-oxazolones in solid-phase peptide synthesis. Efficient syntheses of highly N-alkylated cyclic hexapeptide oxytocin antagonists related to L-365,209

  摘要：

  Fmoc amino acid chlorides have been shown to be useful reagents in the solid-phase synthesis of hexapeptides containing up to four sequential secondary amino acids. The oxytocin antagonist cyclo-(D-Phe-Ile-D-Pip-Pip-D-(N-Me)Phe-Pro) (1) was prepared in 70% overall yield starting from Boc-L-Pro-O-(PAM)-resin. In the synthesis of 1, the high reactivity of Fmoc-L-pipecolic acid chloride used in the di- to tripeptide step averted diketopiperazine formation seen with active ester couplings. The use of Fmoc-amino acid chlorides in the subsequent couplings provided a rapid method for assembly of the linear hexapeptide. The two potent cyclic hexapeptide oxytocin antagonists L-366,682 and L-366,948 were prepared in 45-48% overall yield on a 20 mmol scale using the methodology developed for the synthesis of 1. A particularly difficult coupling was encountered that involved acylation of a sterically hindered N(delta)-Cbz-piperazic acid N-terminus with Fmoc-L-isoleucine. Excess Fmoc-L-isoleucine acid chloride in the presence of tertiary amine base gave only 30% conversion. The efficiency was improved to 76% by utilizing the acid chloride with AgCN in toluene. Further investigation revealed that this combination of reagents produces an activated form of the isoleucine 2-alkoxy-5(4H)-oxazolone derivative.

  DOI：

  10.1021/jo00042a016

文献信息

• Development of a novel class of cyclic hexapeptide oxytocin antagonists based on a natural product
  作者：Peter D. Williams、Mark G. Bock、Roger D. Tung、Victor M. Garsky、Debra S. Perlow、Jill M. Erb、G. F. Lundell、Norman P. Gould、Willie L. Whitter

  DOI：10.1021/jm00099a019

  日期：1992.10

  optimal combination of cyclic amino acid ring sizes at positions 1, 4, and 5 and the role of the N-alkyl substituent at position 6 was elucidated. The lipophilic amino acids at positions 2 and 3 and the unusual amino acid D-dehydropiperazic acid at position 4 were found to be the most critical residues for obtaining good oxytocin receptor affinity. Analogs containing a basic side chain at the less critical

  源自链霉菌的环状六肽催产素拮抗剂的新结构类别，以L-365,209为代表（环-[L-脯氨酰基1-D-苯丙氨酰基2-L-异亮氨酰基3-D-脱氢哌嗪基4-L-脱氢过唑基5-D-（N-甲基）最近报道了苯丙氨酰6]。在本文中，我们通过系统研究通过全合成获得的L-365,209类似物，进一步描述了这一新类的结构活性图谱。阐明了位置1、4和5的环状氨基酸环大小的最佳组合以及位置6的N-烷基取代基的作用。发现在2和3位的亲脂氨基酸和在4位的不寻常氨基酸D-脱氢哌嗪酸是获得良好催产素受体亲和力的最关键的残基。在不太关键的5位和6位上含有基本侧链的类似物保持良好的受体亲和力，并且对于静脉内制剂也具有有用的水溶性水平。通过结合增强效力和溶解性的取代，鉴定了几种在体外具有所需性质组合的类似物（22，环-[L-脯氨酰基-D-色氨酸-L-异亮氨酰基-D-哌啶基-L-pipeco lyl- D-组氨酸]; 25，环-