4b,7,8,9a-Tetrahydro-6H-9-oxa-10-thiaindeno<1,2-a>inden-5-one

• 分子结构分类: 有机化合物 - 有机硫化合物 - 硫醚类
• 英文名称: 4b,7,8,9a-Tetrahydro-6H-9-oxa-10-thiaindeno<1,2-a>inden-5-one
• 英文别名: 3,4,5a,10b-tetrahydrobenzo[4,5]thieno[2,3-b]benzofuran-1(2H)-one；(5aS,10bR)-3,4,5a,10b-tetrahydro-2H-[1]benzothiolo[2,3-b][1]benzofuran-1-one
• 化学式: C₁₄H₁₂O₂S
• 分子量: 244.314
• InChiKey: XJDCNSKWXQEQFI-JSGCOSHPSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.5
• 重原子数：
  17
• 可旋转键数：
  0
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.36
• 拓扑面积：
  51.6
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  2-nitrobenzothiophene 、 1,3-环己二酮 在 1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下， 以 丙酮 为溶剂， 反应 1.5h， 以56%的产率得到4b,7,8,9a-Tetrahydro-6H-9-oxa-10-thiaindeno<1,2-a>inden-5-one
  参考文献：
  名称：

  从2-硝基苯并呋喃和1,3-二羰基化合物到二氢呋喃[2,3-b]苯并呋喃的碱介导方法

  摘要：

  通过碱介导的1，3-二羰基向2-硝基苯并呋喃的迈克尔加成反应，然后分子内环化，已经实现了合成二氢呋喃[2,3- b ]苯并呋喃衍生物的简单方法。各种1,3-二羰基化合物，包括环状的以及三氟甲基化的，都已在最佳条件下与2-硝基苯并呋喃进行了反应，相应的二氢呋喃[2,3- b ]苯并呋喃的回收率中等至优异。 。

  DOI：

  10.1002/asia.202100184

文献信息

• Reactions of a Cyclic Rhodium Carbenoid with Aromatic Compounds and Vinyl Ethers
  作者：Michael C. Pirrung、Jiancun Zhang、Karen Lackey、Daniel D. Sternbach、Frank Brown

  DOI：10.1021/jo00112a036

  日期：1995.4

  Further investigation has been made of the reactions between the cyclic diazo compound 2-diazo-1,3-cyclohexanedione and aromatic heterocycles or vinyl ethers, catalyzed by rhodium carboxylates. The extraordinary reactivity of the carbenoid derived from this diazo compound is shown by its ready reaction with solvents such as dichloromethane, dichloroethane, and fluorobenzene. Detailed investigation of its reactions with furans have shown that steric interactions dominate, both in terms of regioselectivity with unsymmetrical substrates and yield. This reaction provides a useful entry to the furo[2,3-b]furan ring system found in a number of naturally-occurring compounds and is formally a 1,3-dipolar cycloaddition. Products of net C-H insertion and with reverse regiochemistry (furo[3,2-b]furan ring system) were also detected. With pyrroles and thiophenes, cycloadducts were seen in a few cases, but were generally the exception; C-H insertion products dominate these reactions. Vinyl ethers proved reliable reactants in providing dipolar cycloadducts. The results of this study have been interpreted in terms of four pathways: an initial cyclopropanation would produce a spirocyclic dicarbonyl system that on heterolytic cleavage of one of the two cyclopropane bonds would give a zwitterion. The partitioning of such a zwitterion between ring closure and proton transfer would define the ratio of C-H insertion and dipolar cycloaddition products. Both thermodynamic and stereoelectronic arguments have been advanced to explain the observations and were supported by calculations.
• A Base‐Mediated Approach Towards Dihydrofuro[2,3‐ <i>b</i> ]Benzofurans from 2‐Nitrobenzofurans and 1,3‐Dicarbonyls
  作者：Gurdeep Singh、Rajat Pandey、Adarsh S. Kurup、Ramasamy Vijaya Anand

  DOI：10.1002/asia.202100184

  日期：2021.5.17

  A straight‐forward approach for the synthesis of a dihydrofuro[2,3‐b]benzofuran derivatives has been achieved through a base‐mediated Michael addition of 1,3‐dicarbonyls to 2‐nitrobenzofurans followed by intramolecular cyclization. A variety of 1,3‐dicarbonyls, including cyclic as well as trifluoromethylated ones, have been subjected to react with 2‐nitrobenzofurans under optimal conditions, and the

  通过碱介导的1，3-二羰基向2-硝基苯并呋喃的迈克尔加成反应，然后分子内环化，已经实现了合成二氢呋喃[2,3- b ]苯并呋喃衍生物的简单方法。各种1,3-二羰基化合物，包括环状的以及三氟甲基化的，都已在最佳条件下与2-硝基苯并呋喃进行了反应，相应的二氢呋喃[2,3- b ]苯并呋喃的回收率中等至优异。 。