2-((2-bromophenyl)ethynyl)tetrahydrofuran | 1519058-78-6

• 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: 2-((2-bromophenyl)ethynyl)tetrahydrofuran
• 英文别名: 2-[2-(2-Bromophenyl)ethynyl]oxolane；2-[2-(2-bromophenyl)ethynyl]oxolane
• CAS: 1519058-78-6
• 化学式: C₁₂H₁₁BrO
• 分子量: 251.123
• InChiKey: HRCNNAVZROKDKV-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.2
• 重原子数：
  14
• 可旋转键数：
  1
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.33
• 拓扑面积：
  9.2
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为产物：
  描述：

  四氢呋喃 、 1-bromo-2-(bromoethynyl)benzene 在 sodium fluoride 作用下， 反应 35.0h， 以74%的产率得到2-((2-bromophenyl)ethynyl)tetrahydrofuran
  参考文献：
  名称：

  Synthesis of 2-Alkynyltetrahydrofuran Derivatives from Tetrahydrofuran and Alkynyl Bromides

  摘要：

  An efficient and general method for the synthesis of 2-alkynyltetrahydrofuran was developed. The regioselective functionalization of the C(sp(3))-H bond adjacent to an oxygen atom with various alkynyl bromides has been achieved under transition-metal-free reaction conditions. Sodium fluoride was found, for the first time, to promote the efficient functionalization process remarkably. Moreover, 1,2-dibromostyrenes were also found to be effective in this method forming 2-alkenyltetrahydrofurans.

  DOI：

  10.1055/s-0033-1338534

文献信息

• Photochemical Functionalization of Heterocycles with EBX Reagents: C−H Alkynylation versus Deconstructive Ring Cleavage**
  作者：Errika Voutyritsa、Marion Garreau、Maroula G. Kokotou、Ierasia Triandafillidi、Jérôme Waser、Christoforos G. Kokotos

  DOI：10.1002/chem.202002868

  日期：2020.11.11

  The development of novel methodologies for the functionalization of saturated heterocycles is highly desirable. Herein, we report a cheap and efficient photochemical method for the C−H functionalization of saturated O‐heterocycles, as well as the deconstructive ring‐cleavage of S‐heterocycles, employing hypervalent iodine alkynylation reagents (ethynylbenziodoxolones, EBX). This photochemical alkynylation

  非常需要开发用于饱和杂环官能化的新方法。本文中，我们报告了一种便宜且有效的光化学方法，用于使用饱和的O-炔基化试剂（乙炔基苯并zio恶唑，EBX）对饱和O-杂环的C-H功能化以及S-杂环的解构环裂解。该光化学炔化反应是利用苯基乙醛酸作为光引发剂，在家用荧光灯的照射下以高至高收率得到相应的产物。当使用O-杂环时，发生了预期的α-C-H炔基化反应。相反，在S-杂环上观察到氧化性开环形成硫代炔烃和醛。
• Visible Light-Induced Direct S₀ → T_<i>n</i> Transition of Benzophenone Promotes C(sp³)–H Alkynylation of Ethers and Amides
  作者：Koki Matsumoto、Masaya Nakajima、Tetsuhiro Nemoto

  DOI：10.1021/acs.joc.0c01573

  日期：2020.9.18

  Benzophenone has an S-0 -> S-1 absorption band at 365 nm. However, the rarely reported S-0 -> T-n transition occurs upon irradiation at longer wavelengths. Herein, we employed benzophenone as a catalyst and exploited its S-0 -> T-n transition in C(sp(3))-H alkynylations with hypervalent iodine reagents. The selective benzophenone excitation prevented alkynylating reagent decomposition, enabling the reaction to proceed under mild conditions. The reaction mechanism was investigated by spectroscopic and computational studies.
• Synthesis of 2-Alkynyltetrahydrofuran Derivatives from Tetrahydrofuran and Alkynyl Bromides
  作者：Yun Liang、Yuan Yang、Hui Huang、Xiaoyun Zhang、Weilan Zeng

  DOI：10.1055/s-0033-1338534

  日期：——

  An efficient and general method for the synthesis of 2-alkynyltetrahydrofuran was developed. The regioselective functionalization of the C(sp(3))-H bond adjacent to an oxygen atom with various alkynyl bromides has been achieved under transition-metal-free reaction conditions. Sodium fluoride was found, for the first time, to promote the efficient functionalization process remarkably. Moreover, 1,2-dibromostyrenes were also found to be effective in this method forming 2-alkenyltetrahydrofurans.