4-ethynylbenzyl acetate | 863560-90-1

• 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: 4-ethynylbenzyl acetate
• 英文别名: (4-Ethynylphenyl)methyl acetate
• CAS: 863560-90-1
• 化学式: C₁₁H₁₀O₂
• 分子量: 174.199
• InChiKey: HAUXWZLAKTUASL-UHFFFAOYSA-N

物化性质

• 沸点：
  244.8±23.0 °C(Predicted)
• 密度：
  1.08±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.3
• 重原子数：
  13
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.18
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  4-ethynylbenzyl acetate 在 四(三苯基膦)钯 、 potassium carbonate 、 三乙胺 作用下， 以 四氢呋喃 、 甲醇 、 二氯甲烷 、 氯仿 、 N,N-二甲基甲酰胺 为溶剂， 反应 26.0h， 生成
  参考文献：
  名称：

  Hierarchical Self-Assembly of Supramolecular Muscle-Like Fibers

  摘要：

  AbstractAn acid–base switchable [c2]daisy chain rotaxane terminated with two 2,6‐diacetylamino pyridine units has been self‐assembled with a bis(uracil) linker. The complementary hydrogen‐bond recognition patterns, together with lateral van der Waals aggregations, result in the hierarchical formation of unidimensional supramolecular polymers associated in bundles of muscle‐like fibers. Microscopic and scattering techniques reveal that the mesoscopic structure of these bundles depends on the extended or contracted states that the rotaxanes show within individual polymer chains. The observed local dynamics span over several length scales because of a combination of supramolecular and mechanical bonds. This work illustrates the possibility to modify the hierarchical mesoscopic structuring of large polymeric systems by the integrated actuation of individual molecular machines.

  DOI：

  10.1002/anie.201509813
• 作为产物：
  描述：

  4-溴苄基乙酸酯 在 bis-triphenylphosphine-palladium(II) chloride 、 copper(l) iodide 、 四丁基氟化铵 、 三乙胺 、 三苯基膦 作用下， 以 四氢呋喃 为溶剂， 反应 36.5h， 生成 4-ethynylbenzyl acetate
  参考文献：
  名称：

  类似于肌肉的超分子聚合物：成千上万个分子机器的整合运动

  摘要：

  泵送铁：双螺纹轮烷可以与配位单元连接并在铁或锌离子存在下聚合。pH调节触发单个轮烷的协同收缩（或延伸），从而导致肌肉状超分子链的运动放大，其轮廓长度改变了几微米（见图）。

  DOI：

  10.1002/anie.201206571

文献信息

• Iron‐Catalyzed Tertiary Alkylation of Terminal Alkynes with 1,3‐Diesters via a Functionalized Alkyl Radical
  作者：Ming‐Qing Tian、Zhen‐Yao Shen、Xuefei Zhao、Patrick J. Walsh、Xu‐Hong Hu

  DOI：10.1002/anie.202100641

  日期：2021.4.19

  Direct oxidative C(sp)−H/C(sp3)−H cross‐coupling offers an ideal and environmentally benign protocol for C(sp)−C(sp3) bond formations. As such, reactivity and site‐selectivity with respect to C(sp3)−H bond cleavage have remained a persistent challenge. Herein is reported a simple method for iron‐catalyzed/silver‐mediated tertiary alkylation of terminal alkynes with readily available and versatile 1

  直接氧化的C（sp）-H / C（sp 3）-H交叉偶联为C（sp）-C（sp 3）键的形成提供了理想的环境友好方案。因此，相对于C（sp 3）-H键裂解的反应性和位点选择性仍然是一个持续的挑战。本文报道了一种简便易行的方法，可利用易于获得的通用1,3-二羰基化合物对末端炔烃进行铁催化/银介导的叔烷基化。该反应适用于多种底物，即使使用含有其他叔，苄基和C（sp 3）-H将α键合至杂原子。对产品的精心设计使得可以合成一系列通用的构建基块。对照实验暗示了以碳为中心的第三级自由基物种的原位生成。
• Design and synthesis of multi-component 18π annulenic fluorofullerene ensembles suitable for donor–acceptor applications
  作者：Glenn A. Burley、Anthony G. Avent、Ilya V. Gol’dt、Peter B. Hitchcock、Hamad Al-Matar、Demis Paolucci、Francesco Paolucci、Patrick W. Fowler、Alessandro Soncini、Joan M. Street、Roger Taylor

  DOI：10.1039/b309959h

  日期：——

  A series of trannulene (all-trans annulene) derivatives of [60]fullerene have been prepared by reacting C60F18 with methanetricarboxylate esters that incorporate a range of photoactive functions. All the compounds have the intense emerald-green colour of fullerene trannulenes, characterised by strong bands at ca. 612 and 667 nm. Single crystal X-ray studies show that the packing varies with the nature of the addend, attributable to differing steric effects. UV/vis absorption spectra display transitions of the respective fullerene and addend models, indicating absence of electronic interactions between them in the ground state. These now provide an extensive series for testing photoactive (light-harvesting) properties, with the exceptional properties of having strong visible light absorption. Their exceptional stability is attributed to the 18π aromatic circuit, inability to undergo nucleophilic substitution without disrupting this circuit, and a curved cage region that is shielded to reagents by the three bulky addends.

  一系列由[60]富勒烯构成的全反式环烯（trannulene）衍生物已通过C60F18与含有多种光活性功能团的甲烷三羧酸酯反应制备而成。所有化合物都呈现出富勒烯环烯特有的深祖母绿色，其特征在于约612和667纳米处的强吸收带。单晶X射线研究表明，由于空间效应的差异，包合物随附加基团性质的不同而变化。UV/可见光吸收光谱显示了各自富勒烯模型和附加基团的跃迁，表明在基态时它们之间不存在电子相互作用。这些化合物如今提供了一大批用于测试光活性（光捕获）性能的系列，其独特之处在于具有强烈的可见光吸收。它们异常的稳定性归因于18π芳香环路，无法在不破坏此环路的情况下进行亲核取代反应，以及由三个庞大的附加基团保护的弯曲笼状区域。
• Design and synthesis of a new series of 3,5-disubstituted isoxazoles active against Trypanosoma cruzi and Leishmania amazonensis
  作者：Rafael da Rosa、Milene Höehr de Moraes、Lara Almida Zimmermann、Eloir Paulo Schenkel、Mario Steindel、Lílian Sibelle Campos Bernardes

  DOI：10.1016/j.ejmech.2017.01.029

  日期：2017.3

  trypomastigote T. cruzi and their scaffold has been used as inspiration to design new derivatives with improved potency and chemical properties. We describe here the planning and microwave-irradiated synthesis of 26 isoxazole derivatives based on the structure of the lignans 1 and 2. In addition, the in vitro evaluation against culture trypomastigotes and intracellular amastigotes of T. cruzi and intracellular

  恰加斯病和利什曼病是发展中国家中被忽视的热带病（NTD）。尽管有可用于治疗的药物，但是寻找新的有效疗法的努力仍在继续。天然木脂素Grandisin（1）和veraguensin（2）表现出对抗锥虫T. cruzi的活性，其脚手架已被启发用于设计具有更高效价和化学性质的新衍生物。我们在这里基于木脂素1和2的结构描述26种异恶唑衍生物的计划和微波辐射合成。此外，体外评估培养的锥虫和胞内变形虫的抗性。据报道，亚马逊乳杆菌和婴儿乳杆菌的克鲁氏锥虫和胞内变形虫。中合成的衍生物，化合物17（IC 50  = 5.26μM为克氏锥虫），29（IC 50  = 1.74μM为锥虫）和31（IC 50  = 1.13μM为锥虫和IC 50  = 5.08μM为亚马逊乳杆菌（L. amazonensis）是最活跃的，并且在其作用机理的初步研究中还针对抗克鲁斯氏锥虫的重组锥虫硫醚还原酶进行了评估。
• Cooperative Melting in Caged Dimers of Rigid Small Molecule-DNA Hybrids
  作者：Brian R. Stepp、Julianne M. Gibbs-Davis、Dorothea L. F. Koh、SonBinh T. Nguyen

  DOI：10.1021/ja801572n

  日期：2008.7.1

  Rigid small-molecule DNA hybrids (rSMDHs) have been synthesized with three DNA strands attached to a rigid tris(phenylacetylene) core. When combined under dilute conditions, complementary rSMDHs form cage dimers that melt at >10 degrees C higher and much sharper than either unmodified DNA duplexes or rSMDH aggregates formed at higher concentrations. With a 2.97 average number of cooperative duplexes

  已经合成了刚性小分子 DNA 杂交体 (rSMDH)，其中三个 DNA 链连接到刚性三（苯乙炔）核心。当在稀释条件下结合时，互补的 rSMDH 形成笼二聚体，其熔化温度高于 10 摄氏度，比未修饰的 DNA 双链体或在更高浓度下形成的 rSMDH 聚合体更锐利。这些笼状二聚体的平均合作双链数为 2.97，构成了明确定义的 DNA 小分子结构中合作熔解的第一个例子，证明了局部几何形状和离子浓度在基于 DNA 的杂交/去杂交中的重要作用。材料。
• Ethyl acetate as an acetyl source and solvent for acetylation of alcohols by KOH
  作者：Xiaodan Wang、Huilin Sun、Yao Cheng、Wenfei Yang、Xinmei Wang、Liting Xiong、Yiying Li、Jinhui Wang、Chunli Gan、Chunguang Lin、Huanjun Xu

  DOI：10.1039/d3ra08717d

  日期：——

  efficient, convenient and gram-scalable protocol for the acetylation of alcohols with EtOAc as acetyl source and solvent. Various types of alcohols were successfully transformed into according acetylated products. Good to excellent yields were offered by primary alcohols and low to moderate yields were offered by secondary alcohols.

  KOH 介导的温和、高效、方便且克级规模的醇乙酰化方案，以 EtOAc 作为乙酰基源和溶剂。各类醇已成功转化为相应的乙酰化产品。伯醇提供良好到优异的产率，仲醇提供低到中等的产率。