tert-butyl 4-[(3-bromoimidazo[1,2-b]pyridazin-6-yl)amino]piperidine-1-carboxylate | 1330596-27-4

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 哌啶类
• 英文名称: tert-butyl 4-[(3-bromoimidazo[1,2-b]pyridazin-6-yl)amino]piperidine-1-carboxylate
• 英文别名: 4-(3-bromoimidazo[1,2-b]pyridazin-6-ylamino)piperidine-1-carboxylic acid tert-butyl ester
• CAS: 1330596-27-4
• 化学式: C₁₆H₂₂BrN₅O₂
• 分子量: 396.287
• InChiKey: HXNXBHBNGUTARI-UHFFFAOYSA-N

物化性质

• 密度：
  1.52±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.1
• 重原子数：
  24
• 可旋转键数：
  4
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.56
• 拓扑面积：
  71.8
• 氢给体数：
  1
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  tert-butyl 4-[(3-bromoimidazo[1,2-b]pyridazin-6-yl)amino]piperidine-1-carboxylate 在 盐酸 、 (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride 、 palladium diacetate 、 三乙酰氧基硼氢化钠 、 caesium carbonate 、 溶剂黄146 、 4,5-双二苯基膦-9,9-二甲基氧杂蒽 作用下， 以 四氢呋喃 、 1,4-二氧六环 、 水 为溶剂， 反应 19.0h， 生成 3-{4-[(3-fluoropyridin-2-yl)amino]phenyl}-N-(1-methylpiperidin-4-yl)imidazo[1,2-b]pyridazin-6-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：

  1-Boc-4-氨基哌啶 、 3-溴-6-氯咪唑并[1,2-b]哒嗪 在 N,N-二异丙基乙胺 作用下， 以 N-甲基吡咯烷酮 为溶剂， 反应 8.0h， 以40%的产率得到tert-butyl 4-[(3-bromoimidazo[1,2-b]pyridazin-6-yl)amino]piperidine-1-carboxylate
  参考文献：
  名称：

  Imidazopyridazine Inhibitors of Plasmodium falciparum Calcium-Dependent Protein Kinase 1 Also Target Cyclic GMP-Dependent Protein Kinase and Heat Shock Protein 90 To Kill the Parasite at Different Stages of Intracellular Development

  摘要：

  摘要 咪唑哒嗪化合物是钙依赖性蛋白激酶 1 (CDPK1) 的强效 ATP 竞争性抑制剂。 恶性疟原虫 寄生虫生长的 体外 .我们在此表明，根据核心与 R2 取代基之间芳香连接物的性质，这些化合物可分为两类。第 1 类化合物具有嘧啶连接基，抑制寄生虫在分裂后期的生长，而第 2 类化合物具有非嘧啶连接基，抑制滋养体阶段的生长，这表明这两类化合物具有不同的作用模式。这些化合物还能抑制环磷酸腺苷（cGMP）依赖性蛋白激酶（PKG），在 ATP 结合位点取代该酶的守门残基后，它们对该酶的抑制作用大大降低。1 类化合物对表达经修饰的 PKG 的寄生虫品系的效力也大大降低，这表明这些化合物主要通过抑制 PKG 而不是 CDPK1 来杀死寄生虫。HSP90 被确定为 2 类化合物的结合伙伴，一种代表性化合物与 HSP90 N 端结构域中的 ATP 结合位点结合。减小 CDPK1 守门残基的大小可使撞击激酶抑制剂抑制该酶；然而，表达修饰酶的寄生虫品系对这些化合物的敏感性没有变化。综上所述，这些发现表明 CDPK1 可能不是进一步开发抑制剂的合适靶点，咪唑并哒嗪类药物杀死寄生虫的主要机制是通过抑制 PKG 或 HSP90。

  DOI：

  10.1128/aac.01748-15

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。
• [EN] FUSED HETEROCYCLIC COMPOUNDS FOR USE IN THE TREATMENT OF MALARIA<br/>[FR] COMPOSÉS HÉTÉROCYCLIQUES CONDENSÉS POUR UTILISATION DANS LE TRAITEMENT DU PALUDISME
  申请人：MEDICAL RES COUNCIL TECHNOLOGY

  公开号：WO2011101640A1

  公开（公告）日：2011-08-25

  A first aspect of the invention relates to a compound of formula (I), or a pharmaceutically acceptable salt or ester thereof, wherein: R1 is -NR3R4 or -OR5; R2 is selected from aryl, heteroaryl, fused aryl- heterocycloalkyl and fused heteroaryl-heterocycloalkyl each of which may be optionally substituted by one or more R8 groups; R3 is H or alkyl; R4 is: (i) cycloalkyl optionally substituted by one or more -NR11R12, -NHCO2R11, -NHCOR11 and -NHSO2R11 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; (iii) -(CH2)n-heteroaryl, wherein said heteroaryl group is optionally substituted by one or more R7 groups; or (iv) 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 or 6-membered 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; 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 R11 and R12 is independently H or alkyl; and each n is independently an integer from O to 6; for use in treating or preventing a disorder associated with CDPK. Further aspects relate to the use of said compounds in the treatment of various therapeutic disorders, and more particularly as inhibitors of PfCDPK1.

  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-NR3R4或-OR5；R2选自芳基、杂环芳基、融合芳基-杂环烷基和融合杂环芳基-杂环烷基，每种基可能被一个或多个R8基取代；R3为H或烷基；R4为：(i) 可选地被一个或多个-NR11R12、-NHCO2R11、-NHCOR11和-NHSO2R11基取代的环烷基；或(ii) -(CH2)n-杂环烷基，其中所述杂环烷基是一个含氮的4、5或6成员环基，可选地含有一个或多个CO基团，其中所述杂环烷基可被一个或多个(CH2)nR7基团取代；(iii) -(CH2)n-杂芳基，其中所述杂芳基可被一个或多个R7基团取代；或(iv) 被一个或多个-NR11R12基团取代的烷基；或R3和R4与它们连接到的氮一起形成一个含有一个或两个进一步选择自CO、O、N和S的4、5或6成员杂环烷基基团，可选地进一步被一个或多个R7基团取代；R5选自烷基、-(CH2)n-杂芳基和-(CH2)n-杂环烷基，其中所述杂芳基和杂环烷基基团可选地被一个或多个R7基团取代；每个R11和R12独立地为H或烷基；每个n独立地为0到6的整数；用于治疗或预防与CDPK相关的疾病。进一步方面涉及所述化合物在治疗各种治疗性疾病中的使用，更特别地作为PfCDPK1的抑制剂。
• Substituted imidazopyridazines are potent and selective inhibitors of Plasmodium falciparum calcium-dependent protein kinase 1 (PfCDPK1)
  作者：Timothy M. Chapman、Simon A. Osborne、Nathalie Bouloc、Jonathan M. Large、Claire Wallace、Kristian Birchall、Keith H. Ansell、Hayley M. Jones、Debra Taylor、Barbara Clough、Judith L. Green、Anthony A. Holder

  DOI：10.1016/j.bmcl.2013.03.017

  日期：2013.5

  A series of imidazopyridazines which are potent inhibitors of Plasmodium falciparum calcium-dependent protein kinase 1 (PfCDPK1) was identified from a high-throughput screen against the isolated enzyme. Subsequent exploration of the SAR and optimisation has yielded leading members which show promising in vitro anti-parasite activity along with good in vitro ADME and selectivity against human kinases. Initial in vivo testing has revealed good oral bioavailability in a mouse PK study and modest in vivo efficacy in a Plasmodium berghei mouse model of malaria. (C) 2013 Elsevier Ltd. All rights reserved.
• Imidazopyridazines as potent inhibitors of Plasmodium falciparum calcium-dependent protein kinase 1 (PfCDPK1): Preparation and evaluation of pyrazole linked analogues
  作者：Jonathan M. Large、Simon A. Osborne、Ela Smiljanic-Hurley、Keith H. Ansell、Hayley M. Jones、Debra L. Taylor、Barbara Clough、Judith L. Green、Anthony A. Holder

  DOI：10.1016/j.bmcl.2013.08.010

  日期：2013.11

  The structural diversity and SAR in a series of imidazopyridazine inhibitors of Plasmodium falciparum calcium dependent protein kinase 1 (PfCDPK1) has been explored and extended. The opportunity to further improve key ADME parameters by means of lowering log D was identified, and this was achieved by replacement of a six-membered (hetero)aromatic linker with a pyrazole. A short SAR study has delivered key examples with useful in vitro activity and ADME profiles, good selectivity against a human kinase panel and improved levels of lipophilic ligand efficiency. These new analogues thus provide a credible additional route to further development of the series. (C) 2013 The Authors. Published by Elsevier Ltd. All rights reserved.
• 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.