3-<2-(Ethylsulfinyl)benzoyl>pyrrole | 160205-68-5

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 3-<2-(Ethylsulfinyl)benzoyl>pyrrole
• 英文别名: (2-ethylsulfinylphenyl)-(1H-pyrrol-3-yl)methanone
• CAS: 160205-68-5
• 化学式: C₁₃H₁₃NO₂S
• 分子量: 247.318
• InChiKey: MFWLMPZPAGQOOV-UHFFFAOYSA-N

物化性质

• 沸点：
  521.6±30.0 °C(Predicted)
• 密度：
  1.32±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.5
• 重原子数：
  17
• 可旋转键数：
  4
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.15
• 拓扑面积：
  69.1
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  3-<2-(Ethylsulfinyl)benzoyl>pyrrole 以 xylene 为溶剂， 反应 5.5h， 生成 1H,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
• 作为产物：
  描述：

  2-ethylsulfanyl benzoic acid chloride 在 sodium periodate 、 三氯化铝 、 四丁基氟化铵 作用下， 以 四氢呋喃 、 甲醇 、 二氯甲烷 为溶剂， 反应 7.5h， 生成 3-<2-(Ethylsulfinyl)benzoyl>pyrrole
  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

• 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.