(E)-ethyl 4-(4-bromophenyl)-4-oxobut-2-enoate | 35338-15-9

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: (E)-ethyl 4-(4-bromophenyl)-4-oxobut-2-enoate
• 英文别名: ethyl (E)-4-(4-bromophenyl)-4-oxobut-2-enoate
• CAS: 35338-15-9
• 化学式: C₁₂H₁₁BrO₃
• 分子量: 283.122
• InChiKey: ZLQHJDFXKLKCEE-BQYQJAHWSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.8
• 重原子数：
  16
• 可旋转键数：
  5
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.17
• 拓扑面积：
  43.4
• 氢给体数：
  0
• 氢受体数：
  3

安全信息

• 海关编码：
  2918300090

反应信息

• 作为反应物：
  描述：

  (E)-ethyl 4-(4-bromophenyl)-4-oxobut-2-enoate 在 diethylzinc 、 对苯二酚 作用下， 以 甲醇 、 正庚烷 、 1,2-二氯乙烷 、 甲苯 为溶剂， 生成 ethyl trans-4-(4-bromobenzoyl)bicyclo[4.1.0]heptane-3-carboxylate
  参考文献：
  名称：

  Novel Chemical Series of 5-Lipoxygenase-Activating Protein Inhibitors for Treatment of Coronary Artery Disease

  摘要：

  5-Lipoxygenase (5-LO)-activating protein (FLAP) inhibitors have proven to attenuate 5-LO pathway activity and leukotriene production in human clinical trials. However, previous clinical candidates have been discontinued and the link between FLAP inhibition and outcome in inflammatory diseases remains to be established. We here describe a novel series of FLAP inhibitors identified from a screen of 10k compounds and the medicinal chemistry strategies undertaken to progress this series. Compound 4i showed good overall properties and a pIC(50) hWB(free) of 8.1 and an lipophilic ligand efficiency of 5.2. Target engagement for 4i was established in dogs using ex vivo measurement of leukotriene B-4 (LTB4) levels in blood with good correlation to in vitro potency. A predicted human dose of 280 mg b.i.d. suggests a wide margin to any identified in vitro off-target effects and sufficient exposure to achieve an 80% reduction of LTB4 levels in humans. Compound 4i is progressed to preclinical in vivo safety studies.

  DOI：

  10.1021/acs.jmedchem.8b02012
• 作为产物：
  描述：

  4-溴苯乙酮 在 硫酸 、 溶剂黄146 作用下， 生成 (E)-ethyl 4-(4-bromophenyl)-4-oxobut-2-enoate
  参考文献：
  名称：

  取代4-氧代巴豆酸衍生物作为新型的蛋白激酶B（PknB）抑制剂：合成和SAR研究†

  摘要：

  蛋白激酶B（PknB）是结核分枝杆菌（M. tb）细胞分裂和细胞壁生物合成所必需的丝氨酸/苏氨酸蛋白激酶。使用PknB进行的高通量筛选鉴定出一种名为YH-8的（E）-4-氧代巴豆酸抑制剂，该抑制剂被用作SAR研究的支架。实现了酶亲和力的显着改善。结果表明，α，β-不饱和酮骨架和“反式”构型对于对抗PknB的活性至关重要。而且具有芳基的化合物，特别是在苯环上具有吸电子取代基的化合物，其效能是YH-8的四倍。

  DOI：

  10.1039/c6ra24953a

文献信息

• Highly Enantioselective Synthesis of α-Stereogenic Esters through Catalytic Asymmetric Michael Addition of 4-Oxo-4-arylbutenoates
  作者：Zhen Wang、Donghui Chen、Zhigang Yang、Sha Bai、Xiaohua Liu、Lili Lin、Xiaoming Feng

  DOI：10.1002/chem.201001129

  日期：2010.9.3

  Highly enantioselective Michael addition of 1,3‐dicarbonyl compounds and nitromethane to 4‐oxo‐4‐arylbutenoates catalyzed by N,N′‐dioxide–Sc(OTf)3 complexes has been developed. Using 0.5–2 mol % catalyst loading, various α‐stereogenic esters were obtained regioselectively with excellent yields (up to 97 %) and enantioselectivities (up to >99 % ee). Moreover, the reaction performed well under nearly

  已开发出由N，N'-二氧化物-Sc （OTf）3络合物催化的1,3-二羰基化合物和硝基甲烷的高对映选择性Michael加成反应到4-氧代-4-芳基丁烯酸酯。使用0.5–2 mol％的催化剂负载量，可以选择性地获得各种α-立体异构酯，具有极佳的收率（高达97％）和对映选择性（高达> 99％  ee）。此外，该反应在几乎无溶剂的条件下进行得很好。具有官能团的产物已准备好进一步转化，这表明了催化方法的潜在价值。根据实验结果和以前的报告，提出了一个可行的工作模型来解释激活和不对称诱导的起源。
• Substrate-Controlled, One-Pot Synthesis: Access to Chiral Chroman-2-one and Polycyclic Derivatives
  作者：Xue-Li Sun、Ying-Han Chen、Dan-Yang Zhu、Yan Zhang、Yan-Kai Liu

  DOI：10.1021/acs.orglett.6b00160

  日期：2016.2.19

  appropriate choice of electrophiles, one-pot, multicomponent, enantioselective domino reactions have been realized which contain a five-step sequence and provide highly efficient access to potentially bioactive chroman-2-one derivatives as a single diastereoisomer with excellent enantioselectivities and in high yields. This new strategy could significantly improve the previous protocol by directly starting

  基于亲电，一锅煮，多组分，对映选择性多米诺反应已经实现，其含有通过五个步骤顺序，并提供高效的访问潜在的生物活性苯并二氢吡喃-2-酮衍生物作为具有优异的对映选择性，并在单个非对映体的合适的选择高产。通过直接从商业2-羟基苯甲醛而不是预先形成的乳糖醇开始，这种新策略可以显着改善以前的方案，而后者必须在几个额外的步骤中进行合成。
• Studies on antirheumatic agents. 3-Benzoylpropionic acid derivatives.
  作者：KAZUYA KAMEO、KUNIO OGAWA、KIMIYO TAKESHITA、SHIRO NAKAIKE、KAZUYUKI TOMISAWA、KAORU SOTA

  DOI：10.1248/cpb.36.2050

  日期：——

  As part of the search for new antirheumatic agents, three types of 3-benzoylpropionic acid derivatives having a mercapto moiety in their structures were prepared, and tested for suppressing activity on adjuvant arthritis in Sprague-Dawley rats. A structure-activity relationship study showed that substitution on the phenyl ring contributed to the activity and the most favorable substituent was different in each type of derivative.

  作为寻找新型抗风湿药物的一部分，制备了三种含有巯基结构单元的3-苯甲酰丙酸衍生物，并测试了它们对Sprague-Dawley大鼠佐剂性关节炎的抑制活性。结构-活性关系研究表明，苯环上的取代基对活性有贡献，且每种衍生物中最有利的取代基各不相同。
• Asymmetric Diels−Alder Reactions of 2-Pyrones with a Bifunctional Organic Catalyst
  作者：Yi Wang、Hongming Li、Yong-Qiang Wang、Yan Liu、Bruce M. Foxman、Li Deng

  DOI：10.1021/ja070859h

  日期：2007.5.1

  The reactions of 2-pyrones with electron-deficient dienophiles constitute a synthetically useful class of Diels−Alder reaction. By exploring cinchona alkaloid-derived organic molecules as acid−base bifunctional catalysts, we successfully developed the first highly enantioselective and diastereoselective catalytic Diels−Alder reaction with 2-pyrones. Furthermore, we demonstrated the possibility of using

  2-吡喃酮与缺电子亲二烯体的反应构成了一类合成有用的 Diels-Alder 反应。通过探索金鸡纳生物碱衍生的有机分子作为酸碱双功能催化剂，我们成功开发了第一个高对映选择性和非对映选择性催化 Diels-Alder 反应与 2-吡喃酮。此外，我们证明了使用此类催化剂来控制 Diels-Alder 反应中的内/外选择性的可能性。
• Enantioselective conjugate addition of aliphatic thiols to divergently activated electron poor alkenes and dienes
  作者：Rafał Kowalczyk、Aleksandra J. Wierzba、Przemysław J. Boratyński、Julia Bąkowicz

  DOI：10.1016/j.tet.2014.06.035

  日期：2014.9

  Divergently activated double bonds in electron poor 4-oxo-butenoates and (2E,4E)-6-oxo-2,4-dienoates underwent stereoselective and regioselective addition of mercaptans catalyzed by simple Cinchona alkaloids. Application of quinine and quinidine afforded both enantiomers of the 1,4-adducts with respect to the ketone carbonyl group in ees of up to 80%. Single recrystallization of some adducts resulted

  电子贫乏的4-氧代-丁烯酸酯和（2 E，4 E）-6-氧代-2,4-二烯酸酯中的发散活化双键经历了简单的金鸡纳生物碱催化的硫醇的立体选择性和区域选择性加成。相对于酮中的酮羰基，使用奎宁和奎尼丁可得到1,4-加合物的两种对映体，最高可达80％。一些加合物的一次重结晶导致进一步富集高达99％ee。