2-methyl-2-(phenylethynyl)-1,3-dioxolane | 181419-79-4

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 2-methyl-2-(phenylethynyl)-1,3-dioxolane
• 英文别名: 2-Methyl-2-(2-phenylethynyl)-1,3-dioxolane；2-methyl-2-(2-phenylethynyl)-1,3-dioxolane
• CAS: 181419-79-4
• 化学式: C₁₂H₁₂O₂
• 分子量: 188.226
• InChiKey: OLESYVABRDJYSL-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.9
• 重原子数：
  14
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.33
• 拓扑面积：
  18.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  2-methyl-2-(phenylethynyl)-1,3-dioxolane 、 3,4,5,6-tetrahydro-[1,1'-biphenyl]-2-yl trifluoromethanesulfonate 在 palladium diacetate 、 四丁基氯化铵 、 sodium acetate 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 48.0h， 以52%的产率得到9-[2-methyl-2-(1,3-dioxolanyl)]-10-phenyl-1,2,3,4-tetrahydrophenanthrene
  参考文献：
  名称：

  Palladium-Catalyzed Annulation of Internal Alkynes by Arene-Containing Vinylic Iodides and Triflates

  摘要：

  In the presence of a palladium catalyst, internal alkynes undergo carboannulation by cyclic and acyclic vinylic iodides and triflates bearing a neighboring aromatic ring to produce a variety of carbocycles. For example, a number of 9,10-disubstituted-1,2,3,4-tetrahydrophenanthrenes have been prepared in good yields through the palladium-catalyzed annulation of internal alkynes by 2-phenyl-1-cyclohexenyl triflate (1) or 1-iodo-2-phenylcyclohexene (2). This annulation process is fairly general and highly regioselective. The process appears to involve oxidative addition of the vinylic substrate to Pd(0) to produce a vinylic palladium intermediate, which adds the carbon moiety to the less hindered end and the palladium to the more hindered end of the alkyne, followed by intramolecular ring closure onto the neighboring aryl group. The scope and limitations of this methodology are discussed.

  DOI：

  10.1021/jo972154b
• 作为产物：
  描述：

  ((Z)-1-Iodo-2-methanesulfonyl-vinyl)-benzene 在 tetrakis(tetrabutylammonium)decatungstate(VI) 、 potassium carbonate 作用下， 以 丙酮 、 乙腈 为溶剂， 反应 12.0h， 生成 2-methyl-4-(phenylethynyl)-1,3-dioxolane 、 2-methyl-2-(phenylethynyl)-1,3-dioxolane
  参考文献：
  名称：

  十碳酸盐作为直接氢原子转移光催化剂用于亲硫性炔基化反应

  摘要：

  报道了一种用于多种脂肪族氢供体，包括烷烃的炔基化的通用方法。我们使用四丁基癸酸铵作为光催化剂，通过氢原子转移从C–H / Si–H键生成有机基团。后者中间体通过甲磺酰基炔烃进行亲硫性炔基化反应，从而在丢失磺酰基基团后得到内部炔烃。通过组合的实验和计算方法，评估并合理化了不同放射性核苷基团对反应结果的影响。

  DOI：

  10.1021/acs.orglett.1c00381

文献信息

• Palladium-catalysed hydroarylation and hydrovinylation of 3,3-dialkoxy-1-aryl-1-propynes. An approach to 3-aryl- and 3-vinylquinolines
  作者：Sandro Cacchi、Giancarlo Fabrizi、Fabio Marinelli、Leonardo Moro、Paola Pace

  DOI：10.1016/0040-4020(96)00557-1

  日期：1996.7

  Acetylenic acetals and ketals have been reacted with aryl and vinyl halides to generate hydroarylation and hydrovinylation products. The reaction proceeds with high regioselectivity. The carbopalladation step appears to be mainly controlled by steric effects and the new carbon-carbon bond is generated preferentially on the carbon bearing the acetal group. The reaction has been employed to develop a

  乙缩醛和缩酮已与芳基和乙烯基卤化物反应生成氢化芳基化和氢化乙烯基化产物。反应以高区域选择性进行。碳纤维化步骤似乎主要受空间效应控制，并且新的碳-碳键优先在带有缩醛基团的碳上生成。该反应已被用于开发3-芳基和3-乙烯基喹啉的区域选择性合成。
• Palladium-Catalyzed Annulation of Internal Alkynes by Arene-Containing Vinylic Iodides and Triflates
  作者：Richard C. Larock、Qingping Tian

  DOI：10.1021/jo972154b

  日期：1998.3.1

  In the presence of a palladium catalyst, internal alkynes undergo carboannulation by cyclic and acyclic vinylic iodides and triflates bearing a neighboring aromatic ring to produce a variety of carbocycles. For example, a number of 9,10-disubstituted-1,2,3,4-tetrahydrophenanthrenes have been prepared in good yields through the palladium-catalyzed annulation of internal alkynes by 2-phenyl-1-cyclohexenyl triflate (1) or 1-iodo-2-phenylcyclohexene (2). This annulation process is fairly general and highly regioselective. The process appears to involve oxidative addition of the vinylic substrate to Pd(0) to produce a vinylic palladium intermediate, which adds the carbon moiety to the less hindered end and the palladium to the more hindered end of the alkyne, followed by intramolecular ring closure onto the neighboring aryl group. The scope and limitations of this methodology are discussed.
• Decatungstate as Direct Hydrogen Atom Transfer Photocatalyst for SOMOphilic Alkynylation
  作者：Luca Capaldo、Davide Ravelli

  DOI：10.1021/acs.orglett.1c00381

  日期：2021.3.19

  A versatile approach for the alkynylation of a variety of aliphatic hydrogen donors, including alkanes, is reported. We used tetrabutylammonium decatungstate as photocatalyst to generate organoradicals from C–H/Si–H bonds via hydrogen atom transfer. The latter intermediates underwent SOMOphilic alkynylation by methanesulfonyl alkynes to afford internal alkynes upon loss of a sulfonyl radical. The effect

  报道了一种用于多种脂肪族氢供体，包括烷烃的炔基化的通用方法。我们使用四丁基癸酸铵作为光催化剂，通过氢原子转移从C–H / Si–H键生成有机基团。后者中间体通过甲磺酰基炔烃进行亲硫性炔基化反应，从而在丢失磺酰基基团后得到内部炔烃。通过组合的实验和计算方法，评估并合理化了不同放射性核苷基团对反应结果的影响。