2-p-tolylethynylpyridine-3-carbaldehyde | 1398567-32-2

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡啶及其衍生物
• 英文名称: 2-p-tolylethynylpyridine-3-carbaldehyde
• 英文别名: 2-(p-tolylethynyl)nicotinaldehyde
• CAS: 1398567-32-2
• 化学式: C₁₅H₁₁NO
• 分子量: 221.258
• InChiKey: WHWGEEPMTMJDPU-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.6
• 重原子数：
  17.0
• 可旋转键数：
  1.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.07
• 拓扑面积：
  29.96
• 氢给体数：
  0.0
• 氢受体数：
  2.0

反应信息

• 作为反应物：
  描述：

  2-p-tolylethynylpyridine-3-carbaldehyde 在 5%-palladium/activated carbon 、 氢气 作用下， 以 乙酸乙酯 为溶剂， 反应 2.0h， 生成
  参考文献：
  名称：

  Cyclizations of phenylethyl-substituted pyridinecarboxaldehydes

  摘要：

  Several phenylethyl-substituted pyridinecarboxaldehydes were prepared from 2-bromo-3-pyridinecarboxaldehyde and these substances are found to undergo cyclization reactions in acidic media. In the absence of added nucleophile, acid-promoted cyclization and oxidation (MnO2) provide an efficient route to 10,11-dihydro-5H-benzo[4,5]cyclohepta[1,2-b]pyridin-5-ones. Arene nucleophiles may also be added to the acidic mixture to provide good yields of triarylmethane products. Mechanisms are proposed involving dicationic superelectrophilic intermediates. (c) 2013 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2013.01.004
• 作为产物：
  描述：

  4-甲苯基乙炔 在 bis-triphenylphosphine-palladium(II) chloride 、 三乙胺 作用下， 以68%的产率得到2-p-tolylethynylpyridine-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

• Site-Selective Electrophilic Cyclization and Subsequent Ring-Opening: A Synthetic Route to Pyrrolo[1,2-<i>a</i>]quinolines and Indolizines
  作者：Trapti Aggarwal、Sonu Kumar、Devendra K. Dhaked、Rakesh K. Tiwari、Prasad V. Bharatam、Akhilesh K. Verma

  DOI：10.1021/jo3015374

  日期：2012.10.5

  An efficient strategy for the synthesis of pyrrolo[1,2-a]quinolines and indolizines from pyranoquinolines via site-selective electrophilic cyclization and subsequent opening of pyran ring using silver/iodine under mild reaction conditions is described. This approach involves the preferential attack of the pyridyl nitrogen over aryl ring and leads to the formation of 5-endo-dig cyclized products. Quantum

  描述了一种通过位点选择性亲电环化从吡喃并喹啉合成吡咯并[1,2- a ]喹啉和吲哚嗪的有效策略，随后在温和的反应条件下使用银/碘打开吡喃环。这种方法涉及的吡啶基的氮的优先攻击过的芳环，并导致5-地层内切-挖环化产物。C–N（ΔE a = 9.01 kcal / mol）和C–C（ΔE a为了使观察到的位点选择性合理化，进行＝ 31.31kcal / mol）的键形成。通过X射线晶体学研究证实了产物的结构。通过Pd催化的交叉偶联反应，通过亲电碘化反应生成的碘取代的化合物进一步多样化。
• 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。
• Metal-Free Decarboxylative Cyclization/Ring Expansion: Construction of Five-, Six-, and Seven-Membered Heterocycles from 2-Alkynyl Benzaldehydes and Cyclic Amino Acids
  作者：Srinivas Samala、Gajendra Singh、Ravi Kumar、Ravi Sankar Ampapathi、Bijoy Kundu

  DOI：10.1002/anie.201504429

  日期：2015.8.10

  A one pot synthesis of 1H‐benzo[g]indoles, tetrahydrobenzo[h]quinolines, and naphtho[1,2‐b]azepines from 2‐alkynyl benzaldehydes and cyclic amino acids is reported. The salient feature of the strategy involves formation of three new bonds (one CN and two CC bonds) by a metal‐free decarboxylation/cyclization/one‐carbon ring expansion sequence in one pot.

  据报道，由2-炔基苯甲醛和环状氨基酸一锅合成1 H-苯并[g]吲哚，四氢苯并[h]喹啉和萘并[1,2-b]氮杂。该策略的显着特征是通过在一个罐中进行无金属脱羧/环化/一碳环扩环来形成三个新键（一个CN和两个CC键）。