1-methyl-4H-<1>benzothiopyrano<2,3-b>pyrrol-4-one | 82511-57-7

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 硫色烯
• 英文名称: 1-methyl-4H-<1>benzothiopyrano<2,3-b>pyrrol-4-one
• 英文别名: 1-methyl-4H-[1]benzothiopyrano[2,3-b]pyrrol-4-one；1-methylthiochromeno[2,3-b]pyrrol-4-one
• CAS: 82511-57-7
• 化学式: C₁₂H₉NOS
• 分子量: 215.276
• InChiKey: GGUQCFOIGYBNTC-UHFFFAOYSA-N

物化性质

• 沸点：
  385.1±21.0 °C(Predicted)
• 密度：
  1.32±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.75
• 重原子数：
  15.0
• 可旋转键数：
  0.0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.08
• 拓扑面积：
  22.0
• 氢给体数：
  0.0
• 氢受体数：
  3.0

反应信息

• 作为产物：
  描述：

  2-ethylsulfanyl benzoic acid chloride 在 sodium hydroxide 、 sodium periodate 、 三氯化铝 、 四丁基氟化铵 、 四丁基硫酸氢铵 作用下， 以 四氢呋喃 、 甲醇 、 二氯甲烷 、 xylene 、 苯 为溶剂， 反应 13.75h， 生成 1-methyl-4H-<1>benzothiopyrano<2,3-b>pyrrol-4-one
  参考文献：
  名称：

  Sulfenylation Using Sulfoxides. Intramolecular Cyclization of 2- and 3-Acylpyrroles

  摘要：

  AlCl3-catalyzed acylation of N-(phenylsulfonyl)pyrrole with 2-(ethylthio)benzoyl chloride followed by hydrolysis provided 2-(2-(ethylthio)benzoyl)pyrrole (3). Compound 3 was also available from ethyl 2-(ethylthio)benzoate and pyrrolylmagnesium chloride (Scheme 2). Oxidation(NaIO4) gave the corresponding sulfoxide 4 which when refluxed 6 h inp-xylene (bp 138 degrees C) gave predominately the C-3 cyclization product 11 (51%) along with the rearrangement product 12 (17%). Conducting the thermal reaction in the presence of DMAP in refluxing toluene gave mainly the N-1 cyclization product 13 (46%) also accompanied by the rearrangement product 12 (20%). Formation of a 2H-pyrrole spirocyclic intermediate from thermally promoted intramolecular ipso-sulfenylation in 4 is suggested to account for the formation of 12. The N-methyl derivative of 4 (i.e. 6) produced 9 and 10 after 9 h at 138 degrees C; in the presence of DMAP only 9 is produced after 18 h at 138 degrees C. The 3-acyl sulfoxide 8 cyclized to 17 during 6.5 h at 138 degrees C. These results indicate that although sulfoxides are useful for intramolecular sulfenylation reactions, care must be taken in assigning structures to the product(s) because rearrangement may take place during and/or after the initial cyclization reaction. Addition of a basic amine to the reaction mixture may prevent acid-catalyzed rearrangements of the initially formed products.

  DOI：

  10.1021/jo00105a026

文献信息

• Palladium(II)-catalyzed direct annulation of 2-chloronicotinaldehyde with 2-bromothiophenol via novel C(formyl)-C(aryl) coupling strategy
  作者：Mayur I. Morja、Prakashsingh M. Chauhan、Kishor H. Chikhalia

  DOI：10.1007/s11164-021-04536-1

  日期：2021.11

  unprecedented method to the synthesis of 1-azathioxanthone derivatives has been developed by means of palladium-catalyzed C(formyl)-C(aryl) coupling followed by SNAr reaction. Optimization study was carried out through different catalyst, ligand, base and solvent. This approach displays various exclusive characteristics such as operational convenience, moderate to good isolated yields and decent functional

  通过钯催化的 C(甲酰基)-C(芳基)偶联，然后进行 SNAr 反应，开发了一种有效且前所未有的合成 1-硫杂蒽酮衍生物的方法。通过不同的催化剂、配体、碱和溶剂进行优化研究。这种方法显示了各种独特的特性，例如操作方便、中等至良好的分离产率和良好的官能团耐受性。 图形摘要
• Synthesis and rearrangement of pyrrolyl sulfides and sulfones
  作者：Javier DeSales、Robert Greenhouse、Joseph M. Muchowski

  DOI：10.1021/jo00140a016

  日期：1982.9
• Sulfenylation Using Sulfoxides. Intramolecular Cyclization of 2- and 3-Acylpyrroles
  作者：Dallas K. Bates、Kelley A. Tafel

  DOI：10.1021/jo00105a026

  日期：1994.12

  AlCl3-catalyzed acylation of N-(phenylsulfonyl)pyrrole with 2-(ethylthio)benzoyl chloride followed by hydrolysis provided 2-(2-(ethylthio)benzoyl)pyrrole (3). Compound 3 was also available from ethyl 2-(ethylthio)benzoate and pyrrolylmagnesium chloride (Scheme 2). Oxidation(NaIO4) gave the corresponding sulfoxide 4 which when refluxed 6 h inp-xylene (bp 138 degrees C) gave predominately the C-3 cyclization product 11 (51%) along with the rearrangement product 12 (17%). Conducting the thermal reaction in the presence of DMAP in refluxing toluene gave mainly the N-1 cyclization product 13 (46%) also accompanied by the rearrangement product 12 (20%). Formation of a 2H-pyrrole spirocyclic intermediate from thermally promoted intramolecular ipso-sulfenylation in 4 is suggested to account for the formation of 12. The N-methyl derivative of 4 (i.e. 6) produced 9 and 10 after 9 h at 138 degrees C; in the presence of DMAP only 9 is produced after 18 h at 138 degrees C. The 3-acyl sulfoxide 8 cyclized to 17 during 6.5 h at 138 degrees C. These results indicate that although sulfoxides are useful for intramolecular sulfenylation reactions, care must be taken in assigning structures to the product(s) because rearrangement may take place during and/or after the initial cyclization reaction. Addition of a basic amine to the reaction mixture may prevent acid-catalyzed rearrangements of the initially formed products.