2-methyl-2-phenyl-1,3-dioxepane

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二氧环庚烷
• 英文名称: 2-methyl-2-phenyl-1,3-dioxepane
• 英文别名: 2-methyI-2-phenyl-1,3-dioxepan
• 化学式: C₁₂H₁₆O₂
• 分子量: 192.258
• InChiKey: CPFRGQXSZHFHPU-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.2
• 重原子数：
  14
• 可旋转键数：
  1
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  18.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为产物：
  描述：

  苯基三氟甲烷磺酸酯 在 palladium diacetate 、 1,3-双(二苯基膦)丙烷 、 四丁基氟化铵 、 三乙胺 作用下， 以 四氢呋喃 、 N,N-二甲基甲酰胺 为溶剂， 反应 22.5h， 生成 2-methyl-2-phenyl-1,3-dioxepane
  参考文献：
  名称：

  Direct Synthesis of Cyclic Ketals of Acetophenones by Palladium-Catalyzed Arylation of Hydroxyalkyl Vinyl Ethers

  摘要：

  Reaction of 2-hydroxyethyl vinyl ether, 4-hydroxybutyl vinyl ether, or di(ethylene glycol) vinyl ether with aryl triflates, aryl bromides, or iodobenzene in presence of a catalytical amount of palladium acetate and the bidentate ligand DPPP provides a direct entry to cyclic ketals of acetophenones. It is postulated that the reaction proceeds via an initial alpha-arylation of the vinyl ethers to give labile aryl vinyl ether intermediates, which undergo subsequent ketalization in presence of protons in the reaction media. The method merits attention due to the simplicity of the experimental procedure and the possibility of selective ketal formation in the presence of an additional carbonyl group.

  DOI：

  10.1021/jo971454q

文献信息

• Palladium-Catalysed Direct Regioselective Synthesis of Cyclic Ketals from Electron-Rich Olefins and Aryl Bromides in Ionic Liquids
  作者：Zeynab Hyder、Jun Mo、Jianliang Xiao

  DOI：10.1002/adsc.200606151

  日期：2006.8

  wide variety of functional groups. Reported herein is a direct method for the highly regioselective preparation of 5-membered and 7-membered cyclic ketals in respectable to good yields from aryl bromides (1a–k) and electron-rich olefins (2a and b). The reaction is performed with palladium catalysis using ionic liquid as solvent with no need for any halide scavengers, providing an alternative to the

  Heck反应包括有机合成中最重要的碳-碳偶联反应之一。该反应的普及归因于芳基卤化物的广泛可获得性以及该反应对多种官能团的耐受性。本文报道的是一种高区域选择性制备5元和7元环状缩酮的直接方法，可从芳基溴化物（1a-k）和富含电子的烯烃（2a和b）中获得良好的产率。该反应通过使用离子液体作为溶剂的钯催化进行，不需要任何卤化物清除剂，为使用芳基三氟甲磺酸酯提供了另一种选择。发现离子液体可通过以下途径将反应路径引向专有的α-芳基化 阳离子路线。
• An Efficient Procedure for the Preparation of Cyclic Ketals and Thioketals Catalyzed by Zirconium Sulfophenyl Phosphonate
  作者：Massimo Curini、Francesco Epifano、Maria Carla Marcotullio、Ornelio Rosati

  DOI：10.1055/s-2001-15155

  日期：——

  A convenient method for the preparation of cyclic ketals and thioketals using zirconium sulfophenyl phosphonate as catalyst is described.

  描述了一种使用磺基酚磷酸锆作为催化剂制备环酮和硫酮的便利方法。
• Regioselective transformation of alkynes into cyclic acetals and thioacetals with a gold(I) catalyst: comparison with Brønsted acid catalysts
  作者：Laura L. Santos、Violeta R. Ruiz、Maria J. Sabater、Avelino Corma

  DOI：10.1016/j.tet.2008.06.032

  日期：2008.8

  Au(I) catalyzes the transformation of alkynes into cyclic acetals and thioacetals at much higher rate than Brønsted acids. The reaction appears to be general for a range of alkynes and diols or dithiols, which are efficiently transformed with high selectivities. One of the salient features of this reaction process is the high reactivity of the enol ether or enol thioether intermediates, which undergo

  Au（I）以比布朗斯台德酸高得多的速率催化炔烃向环状缩醛和硫缩醛的转化。对于一系列炔烃和二醇或二硫醇，该反应似乎是普遍的，这些炔烃和二醇或二硫醇以高选择性被有效地转化。该反应过程的显着特征之一是烯醇醚或烯醇硫醚中间体的高反应性，它们进行快速异构化反应以提供环状缩醛或硫缩醛，因此不需要分离或随后的活化过程。这种类型的反应使我们能够合成一系列香料。
• The Heck Reaction of Electron-Rich Olefins with Regiocontrol by Hydrogen-Bond Donors
  作者：Jun Mo、Jianliang Xiao

  DOI：10.1002/anie.200600799

  日期：2006.6.19
• Application of Functional Ionic Liquids Possessing Two Adjacent Acid Sites for Acetalization of Aldehydes
  作者：Dongmei Li、Feng Shi、Jiajian Peng、Shu Guo、Youquan Deng

  DOI：10.1021/jo034859l

  日期：2004.5.1

  Several acid functional ionic liquids, in which cations possess two adjacent acid sites, were synthesized and used for the acetalization of aldehydes with good catalytic performance under mild reaction conditions.