2,3,4,5-tetrahydrothiophene-2-carboxamide | 219532-31-7

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 硫杂环戊烷
• 英文名称: 2,3,4,5-tetrahydrothiophene-2-carboxamide
• 英文别名: tetrahydro-thiophene-2-carboxylic acid amide；Tetrahydro-thiophen-2-carbonsaeure-amid；Tetrahydrothiophene-2-carboxamide；thiolane-2-carboxamide
• CAS: 219532-31-7
• 化学式: C₅H₉NOS
• 分子量: 131.199
• InChiKey: UEGCMRZBANKAMD-UHFFFAOYSA-N

物化性质

• 熔点：
  145-147 °C
• 沸点：
  342.2±31.0 °C(Predicted)
• 密度：
  1.230±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  0.3
• 重原子数：
  8
• 可旋转键数：
  1
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.8
• 拓扑面积：
  68.4
• 氢给体数：
  1
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  2,3,4,5-tetrahydrothiophene-2-carboxamide 在 Oxone 作用下， 以 四氢呋喃 、 甲醇 、 水 、 溶剂黄146 为溶剂， 反应 18.0h， 生成 1-<(2,3,4,5-tetrahydro-2-thienyl)carbonyl>-1H-pyrrole S-oxide
  参考文献：
  名称：

  A Sulfoxide-Based Ring Annelation Approach to Fused, Many-Membered Ring N,S-Heterocycles¹

  摘要：

  An approach to many-membered ring N,S-heterocycles involving sulfoxide electrophilic sulfenylation (SES followed by ring expansion of the derived sulfonium salt intermediate tin situ) is illustrated for 9- and 10-membered-ring compounds. Treatment of readily prepared sulfoxides 10a, 10b, 18a, 18b, 23a, and 23b with triflic anhydride (pyridine, CH2Cl2, 0 degrees C) provides heterocycles 13a (65%), 13b (60%), 19a (67%), 19b (67%), 24a (42%), and 24b (80%), respectively. Sulfoxides 5a and 5b, under several different conditions, give only the Pummerer dehydration products 6a and 6b, respectively. Diastereomeric sulfoxides 18a' and 18b', upon treatment with triflic anhydride, do not produce clean product mixtures or any of the desired heterocyclic products but, upon heating in toluene, are converted to the more stable isomers 18a and 18b, respectively. Conducting this isomerization in the presence of 2-mercaptobenzothiazole produces a disulfide indicative of the intermediacy of a sulfenic acid. However, the importance of sulfenic acid derivatives in the SES process leading to many-membered ring heterocycles remains to be determined.

  DOI：

  10.1021/jo9805044
• 作为产物：
  描述：

  tetrahydrothiophene-2-carbonyl chloride 在 ammonium hydroxide 作用下， 以95%的产率得到2,3,4,5-tetrahydrothiophene-2-carboxamide
  参考文献：
  名称：

  A Sulfoxide-Based Ring Annelation Approach to Fused, Many-Membered Ring N,S-Heterocycles¹

  摘要：

  An approach to many-membered ring N,S-heterocycles involving sulfoxide electrophilic sulfenylation (SES followed by ring expansion of the derived sulfonium salt intermediate tin situ) is illustrated for 9- and 10-membered-ring compounds. Treatment of readily prepared sulfoxides 10a, 10b, 18a, 18b, 23a, and 23b with triflic anhydride (pyridine, CH2Cl2, 0 degrees C) provides heterocycles 13a (65%), 13b (60%), 19a (67%), 19b (67%), 24a (42%), and 24b (80%), respectively. Sulfoxides 5a and 5b, under several different conditions, give only the Pummerer dehydration products 6a and 6b, respectively. Diastereomeric sulfoxides 18a' and 18b', upon treatment with triflic anhydride, do not produce clean product mixtures or any of the desired heterocyclic products but, upon heating in toluene, are converted to the more stable isomers 18a and 18b, respectively. Conducting this isomerization in the presence of 2-mercaptobenzothiazole produces a disulfide indicative of the intermediacy of a sulfenic acid. However, the importance of sulfenic acid derivatives in the SES process leading to many-membered ring heterocycles remains to be determined.

  DOI：

  10.1021/jo9805044

文献信息

• Putochin; Egorowa, Zhurnal Obshchei Khimii, 1948, vol. 18, p. 1866,1867
  作者：Putochin、Egorowa

  DOI：——

  日期：——
• A Sulfoxide-Based Ring Annelation Approach to Fused, Many-Membered Ring <b><i>N</i></b>,<b><i>S</i></b>-Heterocycles¹
  作者：Dallas K. Bates、Mingde Xia

  DOI：10.1021/jo9805044

  日期：1998.12.1

  An approach to many-membered ring N,S-heterocycles involving sulfoxide electrophilic sulfenylation (SES followed by ring expansion of the derived sulfonium salt intermediate tin situ) is illustrated for 9- and 10-membered-ring compounds. Treatment of readily prepared sulfoxides 10a, 10b, 18a, 18b, 23a, and 23b with triflic anhydride (pyridine, CH2Cl2, 0 degrees C) provides heterocycles 13a (65%), 13b (60%), 19a (67%), 19b (67%), 24a (42%), and 24b (80%), respectively. Sulfoxides 5a and 5b, under several different conditions, give only the Pummerer dehydration products 6a and 6b, respectively. Diastereomeric sulfoxides 18a' and 18b', upon treatment with triflic anhydride, do not produce clean product mixtures or any of the desired heterocyclic products but, upon heating in toluene, are converted to the more stable isomers 18a and 18b, respectively. Conducting this isomerization in the presence of 2-mercaptobenzothiazole produces a disulfide indicative of the intermediacy of a sulfenic acid. However, the importance of sulfenic acid derivatives in the SES process leading to many-membered ring heterocycles remains to be determined.