1-­bromo-5-methoxyisoquinoline | 1207448-19-8

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 喹啉及其衍生物
• 英文名称: 1-­bromo-5-methoxyisoquinoline
• 英文别名: 1-Bromo-5-methoxyisoquinoline
• CAS: 1207448-19-8
• 化学式: C₁₀H₈BrNO
• 分子量: 238.084
• InChiKey: KTDDVMYKNBURHW-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.1
• 重原子数：
  13
• 可旋转键数：
  1
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.1
• 拓扑面积：
  22.1
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  1-­bromo-5-methoxyisoquinoline 在 bis-triphenylphosphine-palladium(II) chloride copper(l) iodide 、 三乙胺 、 copper(l) chloride 作用下， 以 N,N-二甲基乙酰胺 为溶剂， 生成 7-Methoxy-3-propylpyrrolo[2,1-a]isoquinoline
  参考文献：
  名称：

  Selective Partial Reduction of Various Heteroaromatic Compounds with Bridgehead Nitrogen via Birch Reduction Protocol

  摘要：

  [GRAPHICS]For the first time various heteroaromatic compounds with bridgehead nitrogen, including indolizines, bispyrrolopyrimidines, pyrroloquinolines, pyrroloisoquinolines, and bispyrrolopyrazines, were selectively partially reduced under Birch reduction conditions. It was found that the double bond in the fused heterocycles which possesses the highest LUMO density can be selectively reduced under these conditions. Indolizine 6, containing an ester group at C-6, was reductively alkylated to give dihydroindolizines 8 and 9 possessing a quaternary carbon center in good yield. It was found that ambident substrate 12, under Birch reduction conditions, underwent smooth partial reduction to give 4,5-dihydroquinoline 14 as a sole product with no evidence of reduction of the side chain olefin. It was also shown that electron-rich pyrroloisoquinoline 15, which cannot be reduced via catalytic hydrogenation conditions, was efficiently transformed into its dihydrocounterpart 16 by using the Birch reduction protocol. Finally, it was shown that various fused diazines were smoothly and stereoselectively reduced under Birch reduction conditions to give trans-4,5-disubstituted dihydropyrimidines 30 and 32 in virtually quantitative yields.

  DOI：

  10.1021/jo0479157
• 作为产物：
  描述：

  5-甲氧基异喹啉-1(2H)-酮 在 potassium carbonate 、 三溴氧磷 作用下， 以 乙腈 为溶剂， 生成 1-­bromo-5-methoxyisoquinoline
  参考文献：
  名称：

  Selective Partial Reduction of Various Heteroaromatic Compounds with Bridgehead Nitrogen via Birch Reduction Protocol

  摘要：

  [GRAPHICS]For the first time various heteroaromatic compounds with bridgehead nitrogen, including indolizines, bispyrrolopyrimidines, pyrroloquinolines, pyrroloisoquinolines, and bispyrrolopyrazines, were selectively partially reduced under Birch reduction conditions. It was found that the double bond in the fused heterocycles which possesses the highest LUMO density can be selectively reduced under these conditions. Indolizine 6, containing an ester group at C-6, was reductively alkylated to give dihydroindolizines 8 and 9 possessing a quaternary carbon center in good yield. It was found that ambident substrate 12, under Birch reduction conditions, underwent smooth partial reduction to give 4,5-dihydroquinoline 14 as a sole product with no evidence of reduction of the side chain olefin. It was also shown that electron-rich pyrroloisoquinoline 15, which cannot be reduced via catalytic hydrogenation conditions, was efficiently transformed into its dihydrocounterpart 16 by using the Birch reduction protocol. Finally, it was shown that various fused diazines were smoothly and stereoselectively reduced under Birch reduction conditions to give trans-4,5-disubstituted dihydropyrimidines 30 and 32 in virtually quantitative yields.

  DOI：

  10.1021/jo0479157

文献信息

• Regioselective Bromination of Fused Heterocyclic <i>N</i>-Oxides
  作者：Sarah E. Wengryniuk、Andreas Weickgenannt、Christopher Reiher、Neil A. Strotman、Ke Chen、Martin D. Eastgate、Phil S. Baran

  DOI：10.1021/ol3034675

  日期：2013.2.15

  A mild method for the regioselective C2-bromination of fused azine N-oxides is presented, employing tosic anhydride as the activator and tetra-n-butylammonium bromide as the nucleophilic bromide source. The C2-brominated compounds are produced in moderate to excellent yields and with excellent regioselectivity in most cases. The potential extension of this method to other halogens, effecting C2-chlorination

  提出了一种用于稠合吖嗪N-氧化物的区域选择性 C2-溴化的温和方法，采用对苯二甲酸酐作为活化剂，四正丁基溴化铵作为亲核溴化物源。在大多数情况下，C2 溴化化合物的产率中等至极好，并且具有极好的区域选择性。还介绍了该方法可能扩展到其他卤素，使用 Ts 2 O/TBACl影响 C2 氯化。最后，该方法可以结合到可行的一锅氧化/溴化过程中，使用甲基三氧铼/尿素过氧化氢作为氧化剂。
• [1,2,4]TRIAZOLO[1,5-A]PYRIMIDINE COMPOUNDS AS PDE2 INHIBITORS
  申请人：Janssen Pharmaceutica NV

  公开号：EP3535269B1

  公开（公告）日：2020-12-09