1-methyl-2-(5'-formyl-2'-thienyl)benzimidazole | 83490-14-6

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并咪唑类
• 英文名称: 1-methyl-2-(5'-formyl-2'-thienyl)benzimidazole
• 英文别名: 5-(1-Methyl-2-benzimidazolyl)-2-thiophenecarboxaldehyde；5-(1-methylbenzimidazol-2-yl)thiophene-2-carbaldehyde
• CAS: 83490-14-6
• 化学式: C₁₃H₁₀N₂OS
• 分子量: 242.301
• InChiKey: KWTIMXKKCXQFCD-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.6
• 重原子数：
  17
• 可旋转键数：
  2
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.08
• 拓扑面积：
  63.1
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  1-methyl-2-(5'-formyl-2'-thienyl)benzimidazole 在 potassium dichromate 、 硫酸 作用下， 以 水 为溶剂， 以27%的产率得到1-methyl-2-(5'-carboxy-2'-thienyl)benzimidazole
  参考文献：
  名称：

  Oxidation products of fused 2-hetarylimidazole derivatives

  摘要：

  Oxidation of 5-(1-methyl-1H-benzimidazol-2-yl)thiophene-, and -selenophene-2-carbaldehydes with potassium dichromate in 20% aqueous sulfuric acid afforded the corresponding carboxylic acids. Analogous reaction with 5-(1-methyl-1H-benzimidazol-2-yl)furan-2-carbaldehyde led to the formation of 1-methyl-1H-benzimidazole as a result of decarboxylation of the primary oxidation product and subsequent decomposition of the furan ring. Probable factors responsible for instability of 5-(1H-benzimidazol-2-yl)-hetarene-2-carboxylic acids were considered. The oxidation of 2-furylnaphtho[2,3-d]- and 2-hetarylphenanthro-[9,10-d]imidazoles gave, respectively, an anthraquinone analog and 6,7-quinones. pi-Electron-rich heterocycles in 2-furyl- and 2-pyrrolylphenanthro[9,10-d]imidazoles were oxidized completely, being replaced by hydrogen.

  DOI：

  10.1134/s1070363211080226
• 作为产物：
  描述：

  1-methyl-2-(5'-methyl-2'-thienyl)benzimidazole 在 selenium(IV) oxide 作用下， 以 1,4-二氧六环 为溶剂， 生成 1-methyl-2-(5'-formyl-2'-thienyl)benzimidazole
  参考文献：
  名称：

  Oxidation products of fused 2-hetarylimidazole derivatives

  摘要：

  Oxidation of 5-(1-methyl-1H-benzimidazol-2-yl)thiophene-, and -selenophene-2-carbaldehydes with potassium dichromate in 20% aqueous sulfuric acid afforded the corresponding carboxylic acids. Analogous reaction with 5-(1-methyl-1H-benzimidazol-2-yl)furan-2-carbaldehyde led to the formation of 1-methyl-1H-benzimidazole as a result of decarboxylation of the primary oxidation product and subsequent decomposition of the furan ring. Probable factors responsible for instability of 5-(1H-benzimidazol-2-yl)-hetarene-2-carboxylic acids were considered. The oxidation of 2-furylnaphtho[2,3-d]- and 2-hetarylphenanthro-[9,10-d]imidazoles gave, respectively, an anthraquinone analog and 6,7-quinones. pi-Electron-rich heterocycles in 2-furyl- and 2-pyrrolylphenanthro[9,10-d]imidazoles were oxidized completely, being replaced by hydrogen.

  DOI：

  10.1134/s1070363211080226

文献信息

• Design and Syntheses of Palladium Complexes of NNN/CNN Pincer Ligands: Catalyst for Cross Dehydrogenative Coupling Reaction of Heteroarenes
  作者：Vikki N. Shinde、Nattamai Bhuvanesh、Anil Kumar、Hemant Joshi

  DOI：10.1021/acs.organomet.9b00695

  日期：2020.1.27

  of palladium(II) pincer complexes having NNN and CNN coordination modes. The new complexes were fully characterized with the help of 1H and 13C1H} NMR, HRMS, and IR spectroscopy. The structure and bonding modes of complexes were further authenticated with the help of single-crystal X-ray diffraction. Thermally robust and moisture-/air-insensitive palladium pincer complexes C1–C4 have been used as

  该报告描述了具有NNN和CNN配位模式的新型钯（II）钳形配合物的简单合成。借助1 H和13 C 1 H} NMR，HRMS和IR光谱对新配合物进行了全面表征。借助单晶X射线衍射进一步验证了配合物的结构和键合模式。具有热稳定性且对湿气/空气不敏感的钯夹钳复合物C1 - C4已被用作两个杂芳烃的交叉脱氢偶联（CDC）反应的催化剂，发现非常有效。该催化剂仅用1.0 mol％的催化剂即可成功活化包括苯并咪唑，咪唑，苯并噻唑，咪唑并吡啶，噻吩和呋喃在内的多种杂芳烃的C–H键，仅偶联剂的收率就很高。该催化剂对CHO，COMe，COOMe，COOEt，CONHPh，Me，CN，Br和Cl等官能团具有极好的耐受性。此外，该催化剂可重复使用多达四个反应周期，而效率仅有很小的损失。通过控制实验研究了CDC反应的机理，已表明NNN钳形配体（C5）的乙酸钯类似物是活性催化剂。
• Halo-Bridged Abnormal NHC Palladium(II) Dimer for Catalytic Dehydrogenative Cross-Coupling Reactions of Heteroarenes
  作者：Sreejyothi P、Samaresh Chandra Sau、Pavan K. Vardhanapu、Swadhin K. Mandal

  DOI：10.1021/acs.joc.8b01053

  日期：2018.8.17

  This work describes the dehydrogenative coupling of heteroarenes using a dimeric halo-bridged palladium(II) catalyst bearing an abnormal NHC (aNHC) backbone. The catalyst can successfully activate the C–H bond of a wide range of heteroarenes, which include benzothiazole, benzoxazole, thiophene, furan, and N-methylbenzimidazole. Further, it exhibited good activity for heteroarenes bearing various functional

  这项工作描述了使用二聚卤代桥联钯（II）催化剂轴承的异常NHC（杂芳烃的脱氢偶联一个NHC）主链。该催化剂可以成功活化多种杂芳烃的CH键，包括杂苯并噻唑，苯并恶唑，噻吩，呋喃和N-甲基苯并咪唑。此外，它对于带有各种官能团如CN，CHO，Me，OMe，OAc和Cl的杂芳烃表现出良好的活性。此外，我们通过进行化学计量反应中分离的活性催化剂和表征其作为乙酸根桥联（二聚一个由单晶X射线研究NHC）PdOAc。
• Application of oxime-diversification to optimize ligand interactions within a cryptic pocket of the polo-like kinase 1 polo-box domain
  作者：Xue Zhi Zhao、David Hymel、Terrence R. Burke

  DOI：10.1016/j.bmcl.2016.08.098

  日期：2016.10

  potent previously known polo-like kinase 1 (Plk1) polo-box domain (PBD) binding inhibitors. This improved binding may result by accessing a newly identified auxiliary region proximal to a key hydrophobic cryptic pocket on the surface of the protein. Our findings could have general applicability to the design of PBD-binding antagonists.

  通过涉及使用基于肟连接的策略初步筛选一组87个醛的过程，我们能够实现比最有效的先前已知的polo-like激酶1（Plk1）polo-box的亲和力提高数倍。域（PBD）结合抑制剂。这种改善的结合可以通过接近蛋白质表面上关键疏水隐窝的新近识别出的辅助区域来实现。我们的发现可能普遍适用于PBD结合拮抗剂的设计。
• Palladium(II)-Catalyzed Oxidative C−H/C−H Cross-Coupling of Heteroarenes
  作者：Peihua Xi、Fan Yang、Song Qin、Dongbing Zhao、Jingbo Lan、Ge Gao、Changwei Hu、Jingsong You

  DOI：10.1021/ja909807f

  日期：2010.2.17

  of unsymmetrical biheteroaryl molecules has been developed via Pd(II)-catalyzed oxidative C-H/C-H cross-coupling of heteroarenes. An inversion in reactivity and selectivity has been achieved successfully to perform the desired heterocoupling. This process allows the heterocoupling of not only electron-rich N-containing heteroarenes (e.g., xanthines, azoles, and indolizines) but also electron-poor pyridine

  已经通过 Pd(II) 催化的杂芳烃氧化 CH/CH 交叉偶联开发了一种合成不对称二杂芳基分子的有效方法。已成功实现反应性和选择性的反转以进行所需的异源偶联。该过程不仅允许富电子的含氮杂芳烃（例如黄嘌呤、唑类和吲哚嗪）杂偶联，而且允许贫电子的吡啶 N 氧化物与各种噻吩或呋喃杂偶联。
• Synthesis of novel fluorescent 2,5-di(benzimidazol-2-yl) derivatives of furan, thiophene, selenophene, and 2,4-di(benzimidazol-2-yl)pyrrole
  作者：M. M. El’chaninov、A. A. Aleksandrov

  DOI：10.1134/s107036321605039x

  日期：2016.5

  thienylbenzazoles has shown that 2,5-di(benzimidazol-2-yl)derivatives of five-membered heterocycles with one heteroatom are promising from the viewpoint of requirements to fluorescent dyes and biological fluorescent probes. In the present work, we synthesized the 2,5-dibenzimidazolyl derivatives of furan, thiophene, selenophene and pyrrole.

  对furyland噻吩基苯并唑类的电子和光谱性质的研究表明，从对荧光染料和生物荧光探针的要求来看，具有一个杂原子的五元杂环的2,5-二(苯并咪唑-2-基)衍生物是很有前景的。在目前的工作中，我们合成了呋喃、噻吩、硒吩和吡咯的 2,5-二苯并咪唑基衍生物。