N-(3-fluoropyridin-2-yl)-5-[6-(piperazin-1-yl)imidazo[1,2-b]-pyridazin-3-yl]pyrimidin-2-amine | 1400873-22-4

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二嗪烷类
• 英文名称: N-(3-fluoropyridin-2-yl)-5-[6-(piperazin-1-yl)imidazo[1,2-b]-pyridazin-3-yl]pyrimidin-2-amine
• 英文别名: N-(3-fluoro-2-pyridyl)-5-(6-piperazin-1-ylimidazo[1,2-b]pyridazin-3-yl)pyrimidin-2-amine；N-(3-fluoropyridin-2-yl)-5-(6-piperazin-1-ylimidazo[1,2-b]pyridazin-3-yl)pyrimidin-2-amine
• CAS: 1400873-22-4
• 化学式: C₁₉H₁₈FN₉
• 分子量: 391.411
• InChiKey: ZMGPVFCVEANUCP-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.3
• 重原子数：
  29
• 可旋转键数：
  4
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.21
• 拓扑面积：
  96.2
• 氢给体数：
  2
• 氢受体数：
  9

反应信息

• 作为反应物：
  描述：

  聚合甲醛 、 N-(3-fluoropyridin-2-yl)-5-[6-(piperazin-1-yl)imidazo[1,2-b]-pyridazin-3-yl]pyrimidin-2-amine 在 三乙酰氧基硼氢化钠 、 溶剂黄146 作用下， 以 四氢呋喃 为溶剂， 反应 2.0h， 以41%的产率得到N-(3-fluoropyridin-2-yl)-5-[6-(4-methylpiperazin-1-yl)imidazo-[1,2-b]pyridazin-3-yl]pyrimidin-2-amine
  参考文献：
  名称：

  Optimization of an Imidazopyridazine Series of Inhibitors of Plasmodium falciparum Calcium-Dependent Protein Kinase 1 (PfCDPK1)

  摘要：

  A structure-guided design approach using a homology model of Plasmodium falciparum calcium-dependent protein kinase 1 (Pf CDPK1) was used to improve the potency of a series of imidazopyridazine inhibitors as potential antimalarial agents. This resulted in high affinity compounds with PfCDPK1 enzyme IC50 values less than 10 nM and in vitro P. falciparum antiparasite EC50 values down to 12 nM, although these compounds did not have suitable ADME properties to show in vivo efficacy in a mouse model. Structural modifications designed to address the ADME issues, in particular permeability, were initially accompanied by losses in antiparasite potency, but further optimization allowed a good balance in the compound profile to be achieved. Upon testing in vivo in a murine model of efficacy against malaria, high levels of compound exposure relative to their in vitro activities were achieved, and the modest efficacy that resulted raises questions about the level of effect that is achievable through the targeting of PfCDPK1.

  DOI：

  10.1021/jm500342d
• 作为产物：
  描述：

  tert-butyl 4-[3-(2-aminopyrimidin-5-yl)imidazo[1,2-b]pyridazin-6-yl]piperazine-1-carboxylate 在 盐酸 、 palladium diacetate 、 caesium carbonate 、 4,5-双二苯基膦-9,9-二甲基氧杂蒽 作用下， 以 1,4-二氧六环 为溶剂， 反应 2.0h， 生成 N-(3-fluoropyridin-2-yl)-5-[6-(piperazin-1-yl)imidazo[1,2-b]-pyridazin-3-yl]pyrimidin-2-amine
  参考文献：
  名称：

  Optimization of an Imidazopyridazine Series of Inhibitors of Plasmodium falciparum Calcium-Dependent Protein Kinase 1 (PfCDPK1)

  摘要：

  A structure-guided design approach using a homology model of Plasmodium falciparum calcium-dependent protein kinase 1 (Pf CDPK1) was used to improve the potency of a series of imidazopyridazine inhibitors as potential antimalarial agents. This resulted in high affinity compounds with PfCDPK1 enzyme IC50 values less than 10 nM and in vitro P. falciparum antiparasite EC50 values down to 12 nM, although these compounds did not have suitable ADME properties to show in vivo efficacy in a mouse model. Structural modifications designed to address the ADME issues, in particular permeability, were initially accompanied by losses in antiparasite potency, but further optimization allowed a good balance in the compound profile to be achieved. Upon testing in vivo in a murine model of efficacy against malaria, high levels of compound exposure relative to their in vitro activities were achieved, and the modest efficacy that resulted raises questions about the level of effect that is achievable through the targeting of PfCDPK1.

  DOI：

  10.1021/jm500342d

文献信息

• [EN] IMIDAZO [1, 2 - B] PYRIDAZINE DERIVATIVES AS CDPK1 INHIBITORS<br/>[FR] DÉRIVÉS D'IMIDAZO[1,2-B]PYRIDAZINE COMME INHIBITEURS DE CDPK1
  申请人：MEDICAL RES COUNCIL TECHNOLOGY

  公开号：WO2012127212A1

  公开（公告）日：2012-09-27

  A first aspect of the invention relates to a compound of formula (I), or a pharmaceutically acceptable salt or ester thereof, (Formula (I)) wherein: R1 is -(CH2)nNR3R4, -OR5 or -(CH2)n-heterocycloalkyl, wherein said heterocycloalkyl group is optionally substituted by one or more R7 groups; R2 is selected from aryl, heteroaryl, fused aryl-heterocycloalkyl and fused hetero aryl-heterocycloalkyl each of which is substituted by at least one R8 group; R3 is H or alkyl; R4 is: (i) cycloalkyl optionally substituted by one or more -NR11R12 or NHCOR11 groups; or (ii) -(CH2)n-heterocycloalkyl, wherein said heterocycloalkyl is a 4, 5 or 6-membered nitrogen-containing group optionally containing one or more CO groups, wherein said heterocycloalkyl is optionally substituted by one or more one or more (CH2)nR7 groups; or (iii) alkyl substituted by one or more -NR11R12groups; or R3 and R4 are linked together with the nitrogen to which they are attached to form a 4, 5, 6 or 7-membered monocyclic heterocycloalkyl group or a bicyclic heterocyclic group, each of which optionally contains one or two further groups selected from CO, O, N and S, and which is optionally further substituted by one or more R7 groups; R5 is selected from alkyl, -(CH2)n-heteroaryl and - (CH2)n-heterocycloalkyl, wherein said heteroaryl and heterocycloalkyl groups are each optionally substituted by one or more R7 groups; each R8 is independently selected from - NR16R17, -OR17 and -(CH2)nR17 where each R16 is H and each R17 is independently - (CHR10)n-heteroaryl, wherein said heteroaryl group is in turn optionally substituted by one or more R7 groups; each R10, R11 and R12 is independently H or alkyl; or in the case of an - NR11R12 group, R11 and R12 may be linked together with the nitrogen to which they are attached to form a 4, 5, 6 or 7-membered monocyclic or bicyclic heterocycloalkyl group optionally containing one or two further groups selected from CO, O, N and S, and which is optionally further substituted by one or more R7 groups; each m is independently an integer from 1 to 6; and each n is independently an integer from 0 to 6. Further aspects relate to the use of said compounds in the treatment of various therapeutic disorders, and more particularly as inhibitors of PfCDPK1.

  该发明的第一个方面涉及式(I)的化合物，或其药学上可接受的盐或酯，其中：R1为-(CH2)nNR3R4，-OR5或-(CH2)n-杂环烷基，其中所述的杂环烷基基团可以选择性地由一个或多个R7基团取代；R2选自芳基，杂芳基，融合芳基-杂环烷基和融合杂芳基-杂环烷基，每个基团至少被一个R8基团取代；R3为H或烷基；R4为：(i) 可选择性地由一个或多个-NR11R12或NHCOR11基团取代的环烷基；或(ii) -(CH2)n-杂环烷基，其中所述的杂环烷基是一个含氮的4、5或6元环基团，可选择性地含有一个或多个CO基团，其中所述的杂环烷基可以选择性地由一个或多个(CH2)nR7基团取代；或(iii) 可选择性地由一个或多个-NR11R12基团取代的烷基；或R3和R4与它们连接到的氮原子结合在一起形成一个4、5、6或7元单环杂环烷基基团或一个双环杂环基团，每个基团可选择性地含有一个或两个进一步选择自CO、O、N和S的基团，并且可选择性地进一步由一个或多个R7基团取代；R5选自烷基，-(CH2)n-杂芳基和-(CH2)n-杂环烷基，其中所述的杂芳基和杂环烷基基团可以选择性地由一个或多个R7基团取代；每个R8独立地选自-NR16R17，-OR17和-(CH2)nR17，其中每个R16为H，每个R17独立地为-(CHR10)n-杂芳基，其中所述的杂芳基基团又可选择性地由一个或多个R7基团取代；每个R10、R11和R12独立地为H或烷基；或在-NR11R12基团的情况下，R11和R12可以与它们连接到的氮原子结合在一起形成一个4、5、6或7元单环或双环杂环烷基基团，可选择性地含有一个或两个进一步选择自CO、O、N和S的基团，并且可选择性地进一步由一个或多个R7基团取代；每个m独立地为1到6的整数；每个n独立地为0到6的整数。进一步方面涉及所述化合物在治疗各种治疗性疾病中的应用，特别是作为PfCDPK1的抑制剂。
• Optimization of an Imidazopyridazine Series of Inhibitors of <i>Plasmodium falciparum</i> Calcium-Dependent Protein Kinase 1 (<i>Pf</i>CDPK1)
  作者：Timothy M. Chapman、Simon A. Osborne、Claire Wallace、Kristian Birchall、Nathalie Bouloc、Hayley M. Jones、Keith H. Ansell、Debra L. Taylor、Barbara Clough、Judith L. Green、Anthony A. Holder

  DOI：10.1021/jm500342d

  日期：2014.4.24

  A structure-guided design approach using a homology model of Plasmodium falciparum calcium-dependent protein kinase 1 (Pf CDPK1) was used to improve the potency of a series of imidazopyridazine inhibitors as potential antimalarial agents. This resulted in high affinity compounds with PfCDPK1 enzyme IC50 values less than 10 nM and in vitro P. falciparum antiparasite EC50 values down to 12 nM, although these compounds did not have suitable ADME properties to show in vivo efficacy in a mouse model. Structural modifications designed to address the ADME issues, in particular permeability, were initially accompanied by losses in antiparasite potency, but further optimization allowed a good balance in the compound profile to be achieved. Upon testing in vivo in a murine model of efficacy against malaria, high levels of compound exposure relative to their in vitro activities were achieved, and the modest efficacy that resulted raises questions about the level of effect that is achievable through the targeting of PfCDPK1.