7-methyl-3-(p-tolyl)-1H-isochromen-1-one | 1314961-46-0

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 异香豆素及其衍生物
• 英文名称: 7-methyl-3-(p-tolyl)-1H-isochromen-1-one
• 英文别名: 7-Methyl-3-(4-methylphenyl)isochromen-1-one
• CAS: 1314961-46-0
• 化学式: C₁₇H₁₄O₂
• 分子量: 250.297
• InChiKey: XFDBUOQSHJPCNK-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.3
• 重原子数：
  19
• 可旋转键数：
  1
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.12
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为产物：
  描述：

  methyl 5-methyl-2-(p-tolylethynyl)benzoate 在 iron(III) chloride 作用下， 以 二氯甲烷 为溶剂， 以81%的产率得到7-methyl-3-(p-tolyl)-1H-isochromen-1-one
  参考文献：
  名称：

  Regioselective Synthesis of Isochromenones by Iron(III)/PhSeSePh-Mediated Cyclization of 2-Alkynylaryl Esters

  摘要：

  A series of 4-Se-(Te, S)-isochromenones and 3-substituted isochromenones were synthesized in good yields via FeCl3-mediated cyclization of alkynylaryl esters with different diorganyl dichalcogenides. This methodology was carried out at room temperature, using inexpensive and environmentally friendly iron salts as metallic source and under air atmosphere. The reaction showed to be tolerant to a range of substituents bonded into the aromatic ring of the diorganyl dichalcogenides as well as to alkyl groups directly bonded to the chalcogen atom. Alternatively, the cyclization reaction of 2-alkynylaryl esters with FeCl3, in the absence of diorganyl dichalcogenide, gave the isochromenones without the chalcogen moiety in the structure. This approach proved to be highly regioselective, providing only six-membered ring products, once the possible five-membered products were not observed in any experiments.

  DOI：

  10.1021/jo201211s

文献信息

• One-Step Synthesis of Isocoumarins and 3-Benzylidenephthalides via Ligandless Pd-Catalyzed Oxidative Coupling of Benzoic Acids and Vinylarenes
  作者：Debkumar Nandi、Debalina Ghosh、Shih-Ji Chen、Bing-Chiuan Kuo、Nancy M. Wang、Hon Man Lee

  DOI：10.1021/jo400174w

  日期：2013.4.5

  A straightforward synthetic method for the preparation of isocoumarins and 3-benzylidenephthalides via C–H olefination and oxidative coupling of readily available benzoic acids and vinylarenes was developed. The directing effect of the substituents on the benzoic acid allows for the synthesis of both types of lactone in pure form.

  已开发出一种简单的合成方法，可通过C–H烯化反应和易得的苯甲酸与乙烯基芳烃的氧化偶联来制备异香豆素和3-亚苄基苯。取代基对苯甲酸的直接作用允许以纯净形式合成两种类型的内酯。
• 10.1021/acs.orglett.4c01553
  作者：Lv, Yuhan、Wu, Min、Lu, Weiwei、Cui, Meiying、Liu, Jiaxiang、Yi, Wei、Wang, Xuan、Lu, Xiaojie

  DOI：10.1021/acs.orglett.4c01553

  日期：——

  Inspired by previous selection outcomes, we investigated and developed a rhodium-promoted C–H activation/annulation reaction of DNA-linked terminal alkynes and aromatic acids. This reaction exhibits excellent efficiency with high conversions and a broad substrate scope. Most importantly, the unique DEL-compatible conditions provide a better scenario for yielding an isocoumarin scaffold compared to

  受先前选择结果的启发，我们研究并开发了一种铑促进的 DNA 连接末端炔烃和芳香酸的 C-H 活化/成环反应。该反应表现出优异的效率、高转化率和广泛的底物范围。最重要的是，与传统的有机反应条件相比，独特的 DEL 兼容条件为产生异香豆素支架提供了更好的方案，并且这种新开发的 DNA 方法已证实其在制备 DNA 编码文库中的可行性。
• Regioselective Synthesis of Isochromenones by Iron(III)/PhSeSePh-Mediated Cyclization of 2-Alkynylaryl Esters
  作者：Adriane Sperança、Benhur Godoi、Simone Pinton、Davi F. Back、Paulo H. Menezes、Gilson Zeni

  DOI：10.1021/jo201211s

  日期：2011.8.19

  A series of 4-Se-(Te, S)-isochromenones and 3-substituted isochromenones were synthesized in good yields via FeCl3-mediated cyclization of alkynylaryl esters with different diorganyl dichalcogenides. This methodology was carried out at room temperature, using inexpensive and environmentally friendly iron salts as metallic source and under air atmosphere. The reaction showed to be tolerant to a range of substituents bonded into the aromatic ring of the diorganyl dichalcogenides as well as to alkyl groups directly bonded to the chalcogen atom. Alternatively, the cyclization reaction of 2-alkynylaryl esters with FeCl3, in the absence of diorganyl dichalcogenide, gave the isochromenones without the chalcogen moiety in the structure. This approach proved to be highly regioselective, providing only six-membered ring products, once the possible five-membered products were not observed in any experiments.