2-((4-ethylphenyl)ethynyl)quinoline-3-carbaldehyde | 1159765-60-2

• 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: 2-((4-ethylphenyl)ethynyl)quinoline-3-carbaldehyde
• 英文别名: 2-[2-(4-Ethylphenyl)ethynyl]quinoline-3-carbaldehyde；2-[2-(4-ethylphenyl)ethynyl]quinoline-3-carbaldehyde
• CAS: 1159765-60-2
• 化学式: C₂₀H₁₅NO
• 分子量: 285.345
• InChiKey: IWXSOSBFBZQDKI-UHFFFAOYSA-N

物化性质

• 沸点：
  487.7±40.0 °C(Predicted)
• 密度：
  1.19±0.1 g/cm3(Temp: 20 °C; Press: 760 Torr)(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  4.5
• 重原子数：
  22
• 可旋转键数：
  4
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.1
• 拓扑面积：
  30
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  2-((4-ethylphenyl)ethynyl)quinoline-3-carbaldehyde 在 potassium tert-butylate 、 双氧水 、 三氟甲磺酸钠 作用下， 以 N,N-二甲基乙酰胺 为溶剂， 以67%的产率得到2-(4-ethylphenyl)furo[3,2-b]quinoline
  参考文献：
  名称：

  通过异常 Dakin 型反应自由基促进合成呋喃喹啉

  摘要：

  通过微调从 2-炔基喹啉-3-甲醛中实现了选择性合成呋喃[3,2- b ]喹啉和亚苄基-1,3-二氢呋喃[3,4- b ]喹啉的自由基促进方法碱和氧化剂的高产率。在氧化剂的存在下，该反应通过Dakin 型反应通过脱羰分子内环化得到 5-endo-dig 环化呋喃喹啉；然而，在没有氧化剂的情况下，通过还原性分子内环化选择性地获得了 5-exo-dig 环化产物。X 射线晶体学研究进一步支持呋喃喹啉的形成。所提出的机制得到了控制实验的良好支持。

  DOI：

  10.1002/adsc.202100674
• 作为产物：
  描述：

  4-乙基苯乙炔 在 bis-triphenylphosphine-palladium(II) chloride 、 三乙胺 作用下， 以70%的产率得到2-((4-ethylphenyl)ethynyl)quinoline-3-carbaldehyde
  参考文献：
  名称：

  Silver-Catalyzed Tandem Synthesis of Naphthyridines and Thienopyridines via Three-Component Reaction

  摘要：

  An efficient approach for the silver-catalyzed regioselective tandem synthesis of highly functionalized 1,2-dihydorbenzo[1,6]naphthyridines 6a-z and 7a-e by the reaction of ortho-alkynylaldehydes 3a-n with amines 4a-d and ketones 5a-c/active methylene compounds 5d-g, under mild reaction conditions, is described. The scope of the developed chemistry was successfully extended for the direct synthesis of 1,2-dihydorbenzo[4,5]thieno[2,3-c]pyridines 8a-e, which is known as the sulfur analogue of beta-carbolines. Naphthyridines 6a-z and thienopyridines 8a-e were obtained via dual activation concept using L-proline as organocatalyst; however, naphthyridines 7a-e were synthesized without using organocatalyst. The reaction shows selective N-C bond formation on the more electrophilic alkynyl carbon, resulting in the regioselective 6-endo-digcyclized products. Reactivity behavior of electron-deficient and electron-rich ortho-alkynylaldehydes in the synthesis of naphthyridines and thienopyridine by three-component reaction is supported by the control experiment.

  DOI：

  10.1021/jo400400c

文献信息

• Tandem 6π-Azatriene Electrocyclization of Fused Amino-cyclopentenones: Synthesis of Functionalized Pyrrolo- and Indolo-quinoxalines
  作者：Kapil Mohan Saini、Rakesh K. Saunthwal、Ankit Kumar、Akhilesh K. Verma

  DOI：10.1021/acs.orglett.1c02782

  日期：2021.10.1

  A tandem 6π-azacyclization approach for the synthesis of diversified pyrrolo/indolo[1,2-a]quinoxalines from amino-cyclopentenones has been developed. The reaction proceeds through a trifluoroacetic-acid-mediated 6π-electrocyclization and concomitant opening of the cyclopentenone ring. The advantageous features of the developed chemistry include transition-metal-free conditions, operational simplicity

  已经开发了一种用于从氨基环戊烯酮合成多样化吡咯并/吲哚[1,2- a ]喹喔啉的串联 6π-氮杂环化方法。该反应通过三氟乙酸介导的 6π-电环化和环戊烯酮环的伴随打开进行。所开发化学的优势特征包括无过渡金属条件、操作简单和广泛的底物范围。进一步的 X 射线晶体学研究证实了稠合杂环的指定结构。
• Silver-catalyzed regioselective synthesis of acridines, quinolines, and naphthalenes from 3-(2-alkynyl)aryl-β-ketoesters
  作者：Satya Prakash Shukla、Rakesh Tiwari、Akhilesh Kumar Verma

  DOI：10.1016/j.tet.2012.08.068

  日期：2012.11

  general synthetic method for a wide range of medicinally useful 2-carboxylate derivatives of acridinols, quinolinols, and naphthalenols has been developed via silver-catalyzed electrophilic cyclization of 3-(2-alkynyl)aryl-β-ketoesters. The designed reaction involved selective C–C bond formation on more electrophilic alkynyl carbon, which resulted in the regioselective 6-endo-dig cyclized product, as confirmed

  通过银催化的3-（2-炔基）芳基-β-酮酸酯的亲电子环化反应，已经开发了一种简便，有效且通用的合成方法，用于各种医学上有用的a啶醇，喹啉醇和萘酚的2-羧酸酯衍生物。所设计的反应涉及在多个电子炔基碳选择性C-C键的形成，这就造成了区域选择性6-内-挖环化产物，通过X射线晶体学研究证实。进行氘标记实验以支持所提出的机制。合成方法可适应炔烃上广泛的官能团变异，这对结构和生物活性评估非常有利。
• Synthesis of cyclopentaquinolinone and cyclopentapyridinone from <i>ortho</i>-alkynyl-<i>N</i>-arylaldehyde <i>via</i> superbase-promoted C–N, C–O and C–C bond formation
  作者：Kapil Mohan Saini、Rakesh K. Saunthwal、Sushmita、Akhilesh K. Verma

  DOI：10.1039/d0ob01281e

  日期：——

  and cyclopentapyridinones via C–N, C–C, and CO bond formation. Contrary to the traditional approaches of ring closures, a different mode of annulation is disclosed. The protocol involves the in situ generations of imine intermediate followed by potassium hydroxide-promoted intramolecular cyclization and subsequent dimethyl sulfoxide induced dehydrogenation leads to the formation of N-heterocycles. X-ray

  邻炔基醛与伯胺的无环环境友好，无过渡金属，超碱介导的分子内环化反应会通过C–N，C–C和C O键的形成形成高度官能化的氨基取代的环戊喹啉酮和环戊二吡啶酮。与传统的环闭合方法相反，公开了一种不同的环行方式。该方案涉及原位生成亚胺中间体，然后进行氢氧化钾促进的分子内环化反应，随后由二甲基亚砜诱导的脱氢作用导致N杂环的形成。X射线晶体学研究支持氨基稠合的N-杂环的指定结构。
• Triple‐Bond Directed Csp ² −N Bond Formation with <i>N</i> ‐Fluorobenzenesulfonimide as Aminating Source: One‐Step Transformation of Aldehydes into Amines
  作者：Sushmita、Trapti Aggarwal、Norio Shibata、Akhilesh K. Verma

  DOI：10.1002/chem.201903495

  日期：2019.12.13

  amination of ortho‐alkynyl quinoline/pyridine aldehydes using N‐fluorobenzenesulfonimide as nitrogen source under mild reaction conditions has been described. The designed reaction strategy was triggered by trapping of fluorine by base with subsequent attack of bis(phenylsulfonyl)‐λ2‐azane on the carbonyl carbon of a heterocycle, which was gradually converted into the corresponding amine through a Curtius

  本文描述了一种无金属，多功能的三键定向方法，该方法在温和的反应条件下，使用N-氟苯磺酰亚胺作为氮源，对邻炔基喹啉/吡啶醛进行脱羰CH-氨基化。所设计的反应策略通过用碱与双（苯基磺酰基）随后攻击-λ捕集氟的触发2 -azane上的杂环，其逐渐通过库尔提斯重排型转化成相应的胺的羰基碳。该方案提供了一步一步的方法，可将醛以高收率转化为胺。合成的胺已成功转化为生物学上重要的吡咯并喹啉/吡啶。
• Stereoselective tandem synthesis of thiazolo fused naphthyridines and thienopyridines from o-alkynylaldehydes via Au(<scp>iii</scp>)-catalyzed regioselective 6-endo-dig ring closure
  作者：Rajeev R. Jha、Rakesh K. Saunthwal、Akhilesh K. Verma

  DOI：10.1039/c3ob42035c

  日期：——

  An operationally simple approach for the stereoselective tandem synthesis of novel thiazolo fused naphthyridines 5a–o and thienopyridines 8a–e by the reaction of o-alkynylaldehydes with L-cystine methyl ester hydrochloride via Au(III)-catalyzed regioselective 6-endo-dig ring closure under mild reaction conditions is described. It is noteworthy that alkynes bearing an alkyl and a strong electron-withdrawing nitro group successfully afforded the desired products in good yields.

  本研究介绍了一种操作简单的方法，即在温和的反应条件下，通过 Au(III) 催化的区域选择性 6-endo-dig 封环反应，使邻炔醛与 L-胱氨酸甲酯盐酸盐发生反应，从而立体选择性地串联合成新型噻唑并萘啶 5a-o 和噻吩并吡啶 8a-e。值得注意的是，带有一个烷基和一个强夺电子硝基的炔烃成功地以良好的收率得到了所需的产物。