1,2-bis(3,5-bis(trifluoromethyl)phenyl)ethyne

• 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: 1,2-bis(3,5-bis(trifluoromethyl)phenyl)ethyne
• 英文别名: 1,2-Bis[3,5-bis(trifluoromethyl)phenyl]ethyne；1-[2-[3,5-bis(trifluoromethyl)phenyl]ethynyl]-3,5-bis(trifluoromethyl)benzene
• 化学式: C₁₈H₆F₁₂
• 分子量: 450.226
• InChiKey: UOIKFKIMHPBEQF-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  7.5
• 重原子数：
  30
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.22
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  12

反应信息

• 作为反应物：
  描述：

  1,2-bis(3,5-bis(trifluoromethyl)phenyl)ethyne 、 1-吡啶-2-基吡啶-2-酮 在 dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer 、 silver(I) acetate 、 copper diacetate 作用下， 以 甲醇 为溶剂， 以72%的产率得到5,6,7,8-tetrakis(3,5-bis(trifluoromethyl)phenyl)-1-(pyridin-2-yl)-quinolin-2(1H)-one
  参考文献：
  名称：

  轻度铑催化从吡啶酮直接合成喹诺酮类化合物：在硝基芳香烃检测中的应用

  摘要：

  铑通过双重C–H活化催化的直接区域选择性氧化环化反应可从吡啶酮合成高度取代的喹诺酮。反应在温和条件下进行，范围宽广，官能团耐受性强。探索了这些新颖的喹诺酮类化合物以识别硝基芳族化合物。

  DOI：

  10.1021/acs.joc.7b01932
• 作为产物：
  描述：

  3,5-双(三氟甲基)碘苯 、 calcium carbide 在 copper(l) iodide 、 palladium diacetate 、 三乙胺 、 三苯基膦 作用下， 以 乙腈 为溶剂， 生成 1,2-bis(3,5-bis(trifluoromethyl)phenyl)ethyne
  参考文献：
  名称：

  轻度铑催化从吡啶酮直接合成喹诺酮类化合物：在硝基芳香烃检测中的应用

  摘要：

  铑通过双重C–H活化催化的直接区域选择性氧化环化反应可从吡啶酮合成高度取代的喹诺酮。反应在温和条件下进行，范围宽广，官能团耐受性强。探索了这些新颖的喹诺酮类化合物以识别硝基芳族化合物。

  DOI：

  10.1021/acs.joc.7b01932

文献信息

• Pd-Catalyzed Oxidative Annulation of Aryl Ethers with Alkynes: Synthesis of Functionalized Spirocycles and Naphthalenes
  作者：Shiyong Peng、Zhonghao Sun、Huijuan Zhu、Nuan Chen、Xiaobo Sun、Xiaojie Gong、Jian Wang、Lei Wang

  DOI：10.1021/acs.orglett.0c00970

  日期：2020.4.17

  dearomative [2+2+1] annulations of aryl ethers with alkynes are reported via para-selective C-H functionalization, providing highly functionalized spirocyclohexadienones in moderate to excellent yields under mild reaction conditions. Importantly, mechanistic investigation indicated an unusual C-O bond cleavage was involved. Moreover, polyarylated naphthalenes could be obtained via oxidative [2+2+2] annulation

  通过对位选择性CH官能化报道了钯催化的芳基醚与炔烃的脱芳香[2 + 2 + 1]环化反应，在温和的反应条件下，以中等至极好的收率提供了高度官能化的螺环己二酮。重要的是，机械研究表明涉及异常的CO键裂解。此外，在相同的催化体系下，通过将芳基醚从单甲氧基苯转变为聚甲氧基苯，可以通过氧化[2 + 2 + 2]环氧化反应制得聚芳基萘。
• Palladium‐Catalyzed Cycloisomerizations of Diarylacetylenes: Synthesis, Structures, and Physical Properties of Highly Substituted Naphthalenes and 8,8 a‐Dihydrocyclopenta[<i>a</i>]indenes
  作者：Tsun‐Cheng Wu、Chia‐Cheng Tai、Hsin‐Chieh Tiao、Yu‐Ting Chang、Chia‐Chun Liu、Ching‐Hsiu Li、Cheng‐Hao Huang、Ming‐Yu Kuo、Yao‐Ting Wu

  DOI：10.1002/chem.201100437

  日期：2011.6.20

  Depending on the electronic properties of their substituents, the major products generated by palladium‐catalyzed cycloisomerizations of diarylalkynes are either highly substituted 8,8a‐dihydrocyclopenta[a]indenes 3 or naphthalenes 4. The structures of these compounds were verified by X‐ray crystallographic analysis. Many functional groups tolerated the reaction conditions evaluated in this study.

  根据其取代基的电子特性，二芳基炔烃的钯催化环异构化反应生成的主要产物是高度取代的8,8a-二氢环戊[ a ]茚3或萘4。这些化合物的结构通过X射线晶体学分析进行了验证。许多官能团耐受本研究中评估的反应条件。同位素标记的实验表明，加水在形成这两类化合物中都起着至关重要的作用。系统研究了环加合物3及其类似物的光物理和电化学性质，并将其与基于密度泛函理论的计算预测进行了比较。二氢环戊[一个]茚3在为固体或液体形式显示强发光，而环戊二烯并[一个]茚11j中实际上是无荧光。直接连接到化合物3的主链上的官能团会显着影响物理性能。芳基取代基引起的空间效应引起不同的发光现象，包括聚集诱导和增强的发射。
• One‐Step Annulative π‐Extension of Alkynes with Dibenzosiloles or Dibenzogermoles by Palladium/ <i>o</i> ‐chloranil Catalysis
  作者：Kyohei Ozaki、Keiichiro Murai、Wataru Matsuoka、Katsuaki Kawasumi、Hideto Ito、Kenichiro Itami

  DOI：10.1002/anie.201610374

  日期：2017.1.24

  report an efficient one‐step annulative π‐extension reaction of alkynes that provides access to diarylphenanthrenes and related nanographene precursors. In the presence of a cationic palladium/o‐chloranil catalyst system and dibenzosiloles or dibenzogermoles as π‐extending agents, a variety of diarylacetylenes are transformed successfully into 9,10‐diarylphenanthrenes in a single step with good functional‐group

  在材料科学中，可靠而短的合成多环芳烃和纳米石墨烯的合成路线很重要。在本文中，我们报告了炔烃的高效一步式环扩反应，可接触二芳基菲和相关的纳米石墨烯前体。在阳离子钯/ o存在下氯苯胺催化剂体系和二苯甲酚或二苯并germoles作为π扩展剂，各种二芳基乙炔可在一个步骤中成功转化为具有良好官能团耐受性的9,10-二芳基菲。此外，还证明了1,4-双（苯基乙炔基）苯与二苯基-1,3-丁二炔的π延伸反应，提供了低聚亚芳基产物，这些产物在合成较大的多环芳烃和纳米石墨烯方面具有潜力。
• Palladium-Catalyzed [5 + 2] Rollover Annulation of 1-Benzylpyrazoles with Alkynes: A Direct Entry to Tricyclic 2-Benzazepines
  作者：Alejandro Suárez-Lustres、Nuria Martínez-Yáñez、Álvaro Velasco-Rubio、Jesús A. Varela、Carlos Saá

  DOI：10.1021/acs.orglett.2c04300

  日期：2023.2.10

  first Pd-catalyzed [5 + 2] rollover annulation of 1-benzylpyrazoles with alkynes to assemble 10H-benzo[e]pyrazolo[1,5-a]azepines (tricyclic 2-benzazepines) has been developed. The rollover annulation implies a twofold C–H activation of aryl and heteroaryl Csp2–H bonds (C–H/C–H) of 1-benzylpyrazoles (five-atom partners) and alkynes to give the [5 + 2] annulated compounds.

  已开发出第一个 Pd 催化的 [5 + 2] 翻转环化 1-苄基吡唑与炔烃以组装 10 H-苯并 [ e ] 吡唑并 [1,5- a ] 氮杂（三环 2-苯并氮杂）。翻转环化意味着 1-苄基吡唑（五原子伙伴）和炔烃的芳基和杂芳基 C sp 2 -H 键 (C-H/C-H)的双重 C-H 活化，得到 [5 + 2] 环化化合物。
• Synthetic, Mechanistic, and Computational Investigations of Nitrile-Alkyne Cross-Metathesis
  作者：Andrea M. Geyer、Eric S. Wiedner、J. Brannon Gary、Robyn L. Gdula、Nicola C. Kuhlmann、Marc J. A. Johnson、Barry D. Dunietz、Jeff W. Kampf

  DOI：10.1021/ja800020w

  日期：2008.7.1

  The terminal nitride complexes NW(OC(CF3)(2)Me)(3)(DME) (1-DME), [Li(DME)(2)][NW(OC(CF3)(2)Me)(4)] (2), and [NW(OCMe2CF3)(3)](3) (3) were prepared in good yield by salt elimination from [NWCl3](4). X-ray structures revealed that 1-DME and 2 are monomeric in the solid state. All three complexes catalyze the cross-metathesis of 3-hexyne with assorted nitriles to form propionitrile and the corresponding alkyne. Propylidyne and substituted benzylidyne complexes RCW(OC(CF3)(2)Me)(3) were isolated in good yield upon reaction of 1-DME with 3-hexyne or 1-aryl-1-butyne. The corresponding reactions failed for 3. Instead, EtCW(OC(CF3)Me-2)(3) (6) was prepared via the reaction of W-2(OC(CF3)Me-2)(6) with 3-hexyne at 95 degrees C. Benzylidyne complexes of the form ArCW(OC(CF3)Me-2)(3) (Ar = aryl) then were prepared by treatment of 6 with the appropriate symmetrical alkyne ArCCAr. Three coupled cycles for the interconversion of 1-DME with the corresponding propylidyne and benzylidyne complexes via [2 + 2] cycloaddition-cycloreversion were examined for reversibility. Stoichiometric reactions revealed that both nitrile-alkyne cross-metathesis (NACM) cycles as well as the alkyne cross-metathesis (ACM) cycle operated reversibly in this system. With catalyst 3, depending on the aryl group used, at least one step in one of the NACM cycles was irreversible. In general, catalyst 1-DME afforded more rapid reaction than did 3 under comparable conditions. However, 3 displayed a slightly improved tolerance of polar functional groups than did 1-DME. For both 11-DME and 3, ACM is more rapid than NACM under typical conditions. Alkyne polymerization (AP) is a competing reaction with both 1-DME and 3. It can be suppressed but not entirely eliminated via manipulation of the catalyst concentration. As AP selectively removes 3-hexyne from the system, tandem NACM-ACM-AP can be used to prepare symmetrically substituted alkynes with good selectivity, including an arylene-ethynylene macrocycle. Alternatively, unsymmetrical alkynes of the form EtCCR (R variable) can be prepared with good selectivity via the reaction of RCN with excess 3-hexyne under conditions that suppress AP. DFT calculations support a [2 + 2) cycloaddition-cycloreversion mechanism analogous to that of alkyne metathesis. The barrier to azametalacyciobutadiene ring formation/breakup is greater than that for the corresponding metalacyclobutadiene. Two distinct high-energy azametalacyclobutadiene intermediates were found. These adopted a distorted square pyramidal geometry with significant bond localization.