2-benzyl-5-bromo-4-methoxypyridazin-3(2H)-one

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二嗪类
• 英文名称: 2-benzyl-5-bromo-4-methoxypyridazin-3(2H)-one
• 英文别名: 2-benzyl-4-methoxy-5-bromo-3(2H)-pyridazinone；2-benzyl-5-bromo-4-methoxypyridazin-3-one
• 化学式: C₁₂H₁₁BrN₂O₂
• 分子量: 295.136
• InChiKey: PFDCBAVRAKFFQZ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2
• 重原子数：
  17
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.17
• 拓扑面积：
  41.9
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  2-benzyl-5-bromo-4-methoxypyridazin-3(2H)-one 在 manganese(IV) oxide 、 magnesium,1,3,5-trimethylbenzene-6-ide,bromide 作用下， 以 四氢呋喃 、 甲苯 为溶剂， 反应 3.28h， 生成 5-benzoyl-2-benzyl-4-mesitylpyridazin-3(2H)-one
  参考文献：
  名称：

  Synthesis of Functionalized Pyridazin-3(2H)-ones via Selective Bromine–Magnesium Exchange and Lactam Directed Ortho C–H Magnesiation

  摘要：

  Selective bromine magnesium exchange on 2-benzyl-5-bromo-4-methoxypyridazin-3(2H)-one could be achieved when MesMgBr was used as reagent. With more nucleophilic RMgCl species (R = Bu, i-Pr, Ph) both nucleophilic addition-elimination at C-4 and bromine-magnesium exchange at C-5 occurred. In 2-benzyl-5-bromopyridazin-3(2H)-one, which does not contain a substituent at C-4, addition could not be suppressed. Less nucleophilic Mg amides (TMPMgCl center dot LiCl) allowed regioselective C-H magnesiation at the C-4 position in such substrates, as exemplified for 2-benzyl-5-chloro- and 2-benzyl-6-chloropyridazin-3(2H)-one. Quenching of the magnesiated pyridazinones with electrophiles gives access to a variety of hitherto unknown pyridazin-3(2H)-one derivatives.

  DOI：

  10.1021/jo201009m
• 作为产物：
  描述：

  2-苄基-4,5-二溴吡嗪-3(2H)-酮 生成 2-benzyl-5-bromo-4-methoxypyridazin-3(2H)-one
  参考文献：
  名称：

  Prostaglandin endoperoxide H synthase biosynthesis inhibitors

  摘要：

  该发明描述了式I的吡啶并酮化合物，这些化合物是环氧合酶（COX）抑制剂，特别是选择性地抑制环氧合酶-2（COX-2）。COX-2是与炎症相关的可诱导异构体，与构成性异构体环氧合酶-1（COX-1）相对，后者是许多组织中重要的“基础”酶，包括胃肠道（GI）和肾脏。这些化合物对COX-2的选择性减少了目前市售的非甾体类抗炎药（NSAIDs）所见到的不良胃肠道和肾脏副作用。

  公开号：

  US06307047B1

文献信息

• Synthesis of (Hetero)arylated Pyridazin-3(2<i>H</i>)-ones via Negishi Reaction Involving Zincated Pyridazin-3(2<i>H</i>)-ones
  作者：Tom Verhelst、Zuming Liu、Jens Maes、Bert U. W. Maes

  DOI：10.1021/jo201587j

  日期：2011.12.2

  Zincated pyridazin-3(2H)-ones generated via bromine–magnesium exchange followed by transmetalation using ZnCl2 or via lactam-directed ortho C4-H zincation with TMPZnCl·LiCl have been synthesized. These in situ created organometallics can be used in Negishi reactions with iodo(hetero)arenes delivering a new approach toward (hetero)arylpyridazin-3(2H)-ones.

  合成了通过溴-镁交换，然后使用ZnCl 2进行金属转移或通过内酰胺定向的邻位C4-H锌与TMPZnCl·LiCl生成的锌哒嗪3（2 H）- 。这些原位生成的有机金属化合物可用于Negishi与碘（杂）芳烃的反应，从而为（杂）芳基哒嗪3（2 H）-酮提供了一种新方法。
• [EN] PROSTAGLANDIN ENDOPEROXIDE H SYNTHASE BIOSYNTHESIS INHIBITORS<br/>[FR] INHIBITEURS DE LA BIOSYNTHESE DE LA PROSTAGLANDINE ENDOPEROXYDE H SYNTHASE
  申请人：ABBOTT LAB

  公开号：WO2000024719A1

  公开（公告）日：2000-05-04

  The present invention describes pyridazinone compounds of formula (I) which are cyclooxygenase (COX) inhibitors, and in particular, are selective inhibitors of cyclooxygenase-2 (COX-2). COX-2 is the inducible isoform associated with inflammation, as opposed to the constitutive isoform, cyclooxygenase-1 (COX-1) which is an important 'housekeeping' enzyme in many tissues, including the gastrointestinal (GI) tract and the kidneys. The selectively of these compounds for COX-2 minimizes the unwanted GI and renal side-effects seen with currently marketed non-steroidal anti-inflammatory drugs (NSAIDs).

  本发明描述了式（I）的吡啶酮化合物，它们是环氧合酶（COX）抑制剂，特别是选择性抑制剂环氧合酶-2（COX-2）。COX-2是与炎症有关的诱导型同工酶，而非构成型同工酶环氧合酶-1（COX-1），后者是许多组织（包括胃肠道和肾脏）中重要的“管家”酶。这些化合物对COX-2的选择性最小化了目前市场上非甾体类抗炎药（NSAIDs）所见的不良胃肠道和肾脏副作用。
• Synthesis of Functionalized Pyridazin-3(2<i>H</i>)-ones via Bromine−Magnesium Exchange on Bromopyridazin-3(2<i>H</i>)-ones
  作者：Oxana Ryabtsova、Tom Verhelst、Mattijs Baeten、Christophe M. L. Vande Velde、Bert U. W. Maes

  DOI：10.1021/jo9020985

  日期：2009.12.18

  The potential of halogen-magnesium exchange reactions, followed by quenching with elect rophiles, for the functionalization of the pyridazin-3(2H)-one core was investigated. 2-Benzyl-4-bromo-5-methoxy-(1), 2-benzyl-5-bromo-4-methoxy- (4), and 2-benzyl-4,5-dibromopyridazin-3(2H)-one (10) were selected as readily available model substrates. While I and 10 gave exclusively C-4 metalation, a tandem reaction involving nucleophilic substitution via addition elimination and bromine-magnesium exchange was observed with 4.
• ARYLPYRIDAZINONES AS PROSTAGLANDIN ENDOPEROXIDE H SYNTHASE BIOSYNTHESIS INHIBITORS
  申请人：Abbott Laboratories

  公开号：EP1007515A1

  公开（公告）日：2000-06-14
• PROSTAGLANDIN ENDOPEROXIDE H SYNTHASE BIOSYNTHESIS INHIBITORS
  申请人：ABBOTT LABORATORIES

  公开号：EP1124804A1

  公开（公告）日：2001-08-22