2-phenyl-3,3-dimethylisoindoline-1-thione | 141636-29-5

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 异吲哚及其衍生物
• 英文名称: 2-phenyl-3,3-dimethylisoindoline-1-thione
• 英文别名: 3,3-Dimethyl-2-phenyl-2,3-dihydro-1H-isoindole-1-thione；3,3-dimethyl-2-phenylisoindole-1-thione
• CAS: 141636-29-5
• 化学式: C₁₆H₁₅NS
• 分子量: 253.368
• InChiKey: PUPQCZUMRZDZDW-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.7
• 重原子数：
  18
• 可旋转键数：
  1
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.19
• 拓扑面积：
  35.3
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  2-phenyl-3,3-dimethylisoindoline-1-thione 在 2,3-二甲基-2-丁烯 、 氧气 作用下， 以 苯 为溶剂， 以18%的产率得到3,3-二甲基-2-苯基异吲哚-1-酮
  参考文献：
  名称：

  Photoreactions of isoindoline-1-thiones with alkenes: unusual formation of tricyclic isoindolines

  摘要：

  Photochemical cycloaddition reactions of cyclic thioamides and alkenes have been examined. Irradiation of 2-arylisoindoline-1-thiones 1 in the presence of alkenes 2 gave the unexpected tricyclic isoindolines 3-18. The formation of tricyclic isoindolines can best be explained in terms of the intermediacy of aminospirothietane 27, formed by [2 + 2] photocycloaddition of the C=S double bond of 1 to the C=C double bond of 2. Ring cleavage of the resultant amino thietane, assisted by the participation of the nitrogen lone-pair electrons, produced zwitterions 28 and 29 or 1-mercaptoethylisoindole (30). Subsequent nucleophilic attack of the thiol anion on the iminium carbon of 29 or attack of the thiol group on C-3 of 30 gave the final products. Irradiation of isobenzofuran-1-thione (22) and isobenzothiophene-l-thione (23) in the presence of tetramethylethylene (2a) gave the corresponding spirothietanes 24 and 25.

  DOI：

  10.1021/jo00040a049
• 作为产物：
  描述：

  3,3-二甲基-2-苯基异吲哚-1-酮 在 劳森试剂 作用下， 以 甲苯 为溶剂， 生成 2-phenyl-3,3-dimethylisoindoline-1-thione
  参考文献：
  名称：

  Photoreactions of isoindoline-1-thiones with alkenes: unusual formation of tricyclic isoindolines

  摘要：

  Photochemical cycloaddition reactions of cyclic thioamides and alkenes have been examined. Irradiation of 2-arylisoindoline-1-thiones 1 in the presence of alkenes 2 gave the unexpected tricyclic isoindolines 3-18. The formation of tricyclic isoindolines can best be explained in terms of the intermediacy of aminospirothietane 27, formed by [2 + 2] photocycloaddition of the C=S double bond of 1 to the C=C double bond of 2. Ring cleavage of the resultant amino thietane, assisted by the participation of the nitrogen lone-pair electrons, produced zwitterions 28 and 29 or 1-mercaptoethylisoindole (30). Subsequent nucleophilic attack of the thiol anion on the iminium carbon of 29 or attack of the thiol group on C-3 of 30 gave the final products. Irradiation of isobenzofuran-1-thione (22) and isobenzothiophene-l-thione (23) in the presence of tetramethylethylene (2a) gave the corresponding spirothietanes 24 and 25.

  DOI：

  10.1021/jo00040a049

文献信息

• Photoreactions of isoindoline-1-thiones with alkenes: unusual formation of tricyclic isoindolines
  作者：Takehiko Nishio、Norikazu Okuda

  DOI：10.1021/jo00040a049

  日期：1992.7

  Photochemical cycloaddition reactions of cyclic thioamides and alkenes have been examined. Irradiation of 2-arylisoindoline-1-thiones 1 in the presence of alkenes 2 gave the unexpected tricyclic isoindolines 3-18. The formation of tricyclic isoindolines can best be explained in terms of the intermediacy of aminospirothietane 27, formed by [2 + 2] photocycloaddition of the C=S double bond of 1 to the C=C double bond of 2. Ring cleavage of the resultant amino thietane, assisted by the participation of the nitrogen lone-pair electrons, produced zwitterions 28 and 29 or 1-mercaptoethylisoindole (30). Subsequent nucleophilic attack of the thiol anion on the iminium carbon of 29 or attack of the thiol group on C-3 of 30 gave the final products. Irradiation of isobenzofuran-1-thione (22) and isobenzothiophene-l-thione (23) in the presence of tetramethylethylene (2a) gave the corresponding spirothietanes 24 and 25.