1-Cyclopropyl-2-(m-methylphenyl)acetylene

• 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-Cyclopropyl-2-(m-methylphenyl)acetylene
• 英文别名: 1-(cyclopropylethynyl)-3-methylbenzene；1-(2-cyclopropylethynyl)-3-methylbenzene；1-(2-Cyclopropylethynyl)-3-methylbenzene
• 化学式: C₁₂H₁₂
• 分子量: 156.227
• InChiKey: FEMUCQAXRXKJMR-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.6
• 重原子数：
  12
• 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：
  0
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为反应物：
  描述：

  1-Cyclopropyl-2-(m-methylphenyl)acetylene 在 正丁基锂 、 戴斯-马丁氧化剂 、 palladium dichloride 作用下， 以 四氢呋喃 、 正己烷 、 二氯甲烷 为溶剂， 反应 9.17h， 生成 (Z)-2-(2-oxo-2-phenyl-1-(m-tolyl)ethylidene)cyclobutanone
  参考文献：
  名称：

  PdCl 2催化3-环亚丙基丙-2--2--1-酮的氧化环化

  摘要：

  报道了新颖的PdCl 2催化的3-环亚丙基丙-2-烯-1-酮的氧化环异构化，其通过呋喃稠合的环丁烯中间体容易地合成高应变的官能化的2-亚烷基环丁酮。还实现了一种有趣的路线，该路线通过环收缩重排反应从所获得的2-亚烷基亚环丁酮中得到具有螺-环丙烷单元的2（3 H）-呋喃酮。

  DOI：

  10.1021/ol300927n
• 作为产物：
  描述：

  β-Chloro-α-cyclopropyl-m-methylstyrene 在 正丁基锂 作用下， 以 四氢呋喃 、 正己烷 为溶剂， 反应 3.0h， 以44%的产率得到1-Cyclopropyl-2-(m-methylphenyl)acetylene
  参考文献：
  名称：

  Precise control of the formation of a covalent and an ionic bond in carbocation-carbanion combination reactions

  摘要：

  The electronic effect on the selectivity of covalent or ionic bond formation was examined for the reaction of Kuhn's anion 1- (C67H39-; tris(7H-dibenzo[c,g]fluorenylidenemethyl)methide ion) and 1-aryl-2,3-dicyclopropylcyclopropenylium ions. The carbocation stability was progressively changed by varying the substituent on the phenyl ring, while the steric effect was kept essentially unchanged. The cations having the p-chlorophenyl (2a+), phenyl (2b+), m-methylphenyl (2c+), or m,m'-dimethylphenyl (2d+) group gave a covalent product, whereas a carbocation-carbanion salt was obtained from the cations having the p-methylphenyl (2e+) or p-methoxyphenyl (2f+) group. The reduction potentials E(red) of the cations, as determined by cyclic voltammetry, showed that the formation of the covalent or ionic product is switched by a small difference in stability (less-than-or-equal-to 0.4 kcal/mol) between 2d+ and 2e+. In chloroform, the salts 1-2e+ and 1-2f+ were transformed into covalent forms 1-2e and 1-2f, which can exist only in solution. When 1-(2a-d) and 1-2e,f+ were dissolved in DMSO, equilibrium between a covalent compound and ions was established. A plot of the free energy of heterolysis DELTAG(het)-degrees for 1-(2a-f) against the E(red) of the corresponding cations 2a-f+ showed that DELTAG(het)-degrees decreases as the cation is more stabilized. The heterolysis in DMSO was shown to be enhanced by ca. 13 kcal/mol both by the steric congestion in the covalent molecules and the stabilization of the cyclopropenylium ions by solvation.

  DOI：

  10.1021/jo00073a047

文献信息

• Trisulfur Radical Anion (S₃^•–) Involved [1 + 2 + 2] and [1 + 3 + 1] Cycloaddition with Aromatic Alkynes: Synthesis of Tetraphenylthiophene and 2-Benzylidenetetrahydrothiophene Derivatives
  作者：Jing-Hao Li、Qi Huang、Shun-Yi Wang、Shun-Jun Ji

  DOI：10.1021/acs.orglett.8b02066

  日期：2018.8.3

  S3•–-mediated [1 + 2 + 2] and [1 + 3 + 1] cycloaddition reactions of aromatic alkynes to give tetraphenylthiophene and 2-benzylidenetetrahydrothiophene derivatives via two C–S bond formations are developed. These two protocols provide new, simple, and straightforward strategies to construct tetraphenylthiophene and 2-benzylidenetetrahydrothiophene derivatives under transition-metal-free conditions

  S 3 •-介导的芳香炔烃的[1 + 2 + 2]和[1 + 3 + 1]环加成反应通过两个CS键形成四苯基噻吩和2-亚苄基四氢噻吩衍生物。这两种方案提供了在无过渡金属条件下构建四苯基噻吩和2-亚苄基四氢噻吩衍生物的新颖，简单和直接的策略。这项研究还扩大了S 3 •在有机反应中的应用。
• Asymmetric α-Pentadienylation of Aldehydes with Cyclopropylacetylenes
  作者：Min-Song Wu、Zhi-Yong Han、Liu-Zhu Gong

  DOI：10.1021/acs.orglett.0c03466

  日期：2021.2.5

  cyclopropylacetylene and its derivatives as the pentadienylation reagent, an asymmetric regioselective asymmetric α-pentadienylation reaction of aldehydes is developed by cooperative catalysis of a chiral Pd(0) catalyst and a chiral Brønsted acid in the presence of a subschoichmetric amount of an achiral amine. α-Pentadienylated aldehydes are afforded with high yields and enantioselectivities as well as excellent

  通过使用现成的环丙基乙炔及其衍生物作为戊二烯基化试剂，通过亚催化量的手性Pd（0）催化剂和手性布朗斯台德酸的协同催化，开发了醛类的不对称区域选择性不对称α-戊二烯基化反应。非手性胺。以高收率和对映选择性以及出色的E / Z比提供α-戊二烯基化醛。
• 2-亚苄基四氢噻吩衍生物的合成方法
  申请人：苏州大学

  公开号：CN108395423B

  公开（公告）日：2020-05-15

  本发明涉及一种2‑亚苄基四氢噻吩衍生物的合成方法，包括以下步骤：式(I)所示的(环丙基乙炔基)芳环类化合物和硫源以有机溶剂为反应介质，在空气氛围下于100‑200℃下进行反应，得到式(III)所示的2‑亚苄基四氢噻吩衍生物，反应路线如下：其中，Ar选自苯环、取代苯环、联苯基、噻吩环或萘环；取代苯环上的取代基选自卤素、三氟甲基、氰基和C1‑C20烷基中的一种或几种；R1选自氢或C1‑C20烷基。本发明的方法反应条件简单，后处理方便，环境友好，无需过渡金属催化。
• Ruthenium-catalyzed C–H/O–H and C–H/N–H bond functionalizations: oxidative annulations of cyclopropyl-substituted alkynes
  作者：Monica Deponti、Sergei I. Kozhushkov、Dmitry S. Yufit、Lutz Ackermann

  DOI：10.1039/c2ob26250a

  日期：——

  The chemical behavior of cyclopropyl-substituted alkynes has been probed using the reaction conditions of ruthenium-catalyzed oxidative C–H/O–H and C–H/N–H bond functionalizations. The oxidative annulations proceeded with complete conservation of all cyclopropane fragments and allowed for the one-step preparation of synthetically useful cyclopropyl-substituted isocoumarins and isoquinolones with high regioselectivities and chemical yields. The connectivities of the key heterocyclic products were unambiguously established by X-ray diffraction analysis.

  使用钌催化的氧化 C–H/O–H 和 C–H/N–H 键功能化反应条件，对环丙基取代的炔烃的化学行为进行了探讨。氧化环化反应在完全保留所有环丙烷片段的情况下进行，并允许一步法合成具有高区域选择性和化学产率的合成有用的环丙基取代异香豆酸和异喹啉。关键杂环产物的连接方式通过 X 射线衍射分析得到了明确的确定。
• Palladium-catalyzed dearomative allylation of indoles with cyclopropyl acetylenes: access to indolenine derivatives
  作者：Chuan-Jun Lu、Yu-Ting Chen、Hong Wang、Yu-Jin Li

  DOI：10.1039/d0ob02103b

  日期：——

  A palladium-catalyzed redox-neutral allylic alkylation of indoles with cyclopropyl acetylenes has been disclosed. Various 1,3-diene indolenine framework bearing a quaternary stereocenter at the C3 position were synthesized straightforwardly in good to excellent yields with high regio- and stereoselectivities. The reaction could be further expanded to the dearomatization of naphthols to synthesize functionalized

  已经公开了用环丙基乙炔进行的钯催化的吲哚的氧化还原-中性烯丙基烷基化。直接合成了在C3位置带有一个四级立体中心的各种1,3-二烯吲哚烯骨架，并具有良好的产率和良好的选择性，并具有较高的区域选择性和立体选择性。该反应可以进一步扩展至萘酚的脱芳香化以合成具有1，3-二烯基序的官能化环己二酮。该反应表现出高原子经济性和良好的官能团耐受性。