4-N-(2-piperazin-1-ylethyl)pyridine-3,4-diamine | 1026243-57-1

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡啶及其衍生物
• 英文名称: 4-N-(2-piperazin-1-ylethyl)pyridine-3,4-diamine
• CAS: 1026243-57-1
• 化学式: C₁₁H₁₉N₅
• 分子量: 221.305
• InChiKey: JZMNSULVKUHKOB-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.5
• 重原子数：
  16
• 可旋转键数：
  4
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.55
• 拓扑面积：
  66.2
• 氢给体数：
  3
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  4-N-(2-piperazin-1-ylethyl)pyridine-3,4-diamine 在 氢氧化钾 、 溶剂黄146 、 三乙胺 作用下， 以 四氢呋喃 、 乙醇 为溶剂， 反应 135.0h， 生成 6-(4-Fluoro-phenyl)-3-{4-[2-(2-methyl-imidazo[4,5-c]pyridin-1-yl)-ethyl]-piperazine-1-sulfonyl}-indole-1-carboxylic acid tert-butyl ester
  参考文献：
  名称：

  Discovery and Evaluation of a Series of 3-Acylindole Imidazopyridine Platelet-Activating Factor Antagonists

  摘要：

  Studies conducted with the goal of discovering a second-generation platelet-activating factor (PAF) antagonist have identified a novel class of potent and orally active antagonists which have high aqueous solubility and long duration of action in animal models. The compounds arose from the combination of the lipophilic indole portion of Abbott's first-generation PAF antagonist ABT-299 (2) with the methylimidazopyridine heterocycle moiety of British Biotechnology's BB-882 (1) and possess the positive attributes of both of these clinical candidates. Structure-activity relationship (SAR) studies indicated that modification of the indole and benzoyl spacer of lead compound 7b gave analogues that were more potent, longer-lived, and bioavailable and resulted in the identification of 1-(N,N-dimethylcarbamoyl)-4-ethynyl-3-(3-fluoro-4-[(1H-2-methylimidazo[4,5-c]pyrid-1-yl)methyl] benzoyl}indole hydrochloride (ABT-491, 22m.HCl) which has been evaluated extensively and is currently in clinical development.

  DOI：

  10.1021/jm970389+
• 作为产物：
  描述：

  N-氨乙基哌嗪 在 palladium on activated charcoal 氢气 作用下， 以 乙醇 、 乙腈 为溶剂， 反应 40.0h， 生成 4-N-(2-piperazin-1-ylethyl)pyridine-3,4-diamine
  参考文献：
  名称：

  Discovery and Evaluation of a Series of 3-Acylindole Imidazopyridine Platelet-Activating Factor Antagonists

  摘要：

  Studies conducted with the goal of discovering a second-generation platelet-activating factor (PAF) antagonist have identified a novel class of potent and orally active antagonists which have high aqueous solubility and long duration of action in animal models. The compounds arose from the combination of the lipophilic indole portion of Abbott's first-generation PAF antagonist ABT-299 (2) with the methylimidazopyridine heterocycle moiety of British Biotechnology's BB-882 (1) and possess the positive attributes of both of these clinical candidates. Structure-activity relationship (SAR) studies indicated that modification of the indole and benzoyl spacer of lead compound 7b gave analogues that were more potent, longer-lived, and bioavailable and resulted in the identification of 1-(N,N-dimethylcarbamoyl)-4-ethynyl-3-(3-fluoro-4-[(1H-2-methylimidazo[4,5-c]pyrid-1-yl)methyl] benzoyl}indole hydrochloride (ABT-491, 22m.HCl) which has been evaluated extensively and is currently in clinical development.

  DOI：

  10.1021/jm970389+

文献信息

• Pd(II)-Catalyzed C4-Selective Alkynylation of Indoles by a Transient Directing Group
  作者：Ze-Xuan Zhang、Bing Zhang、Meng Yuan、Peng-Fei Zhao、Chao-Shan Da

  DOI：10.1021/acs.orglett.4c01970

  日期：2024.8.16

  With alanine as a transient directing group, Pd-catalyzed regioselective alkynylation at the indole C4-position was successfully established in a good yield. The total synthesis of the PAF antagonist demonstrated the synthetic utility of this protocol. The regioselectivity was explicitly proven by the prepared C4-selective palladacycle intermediate in the catalytic process and the DFT calculation of

  以丙氨酸作为瞬时导向基团，Pd 催化的吲哚 C4 位区域选择性炔基化反应以良好的产率成功建立。 PAF拮抗剂的全合成证明了该方案的合成效用。催化过程中制备的C4选择性环钯中间体以及吲哚C4和C2位点选择性C-H活化能垒的DFT计算明确证明了区域选择性。