but-2-enyl 2-thioxo-3H-benzoxazole-3-carboxylate

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并恶唑类
• 英文名称: but-2-enyl 2-thioxo-3H-benzoxazole-3-carboxylate
• 英文别名: But-3-enyl 2-sulfanylidene-1,3-benzoxazole-3-carboxylate
• 化学式: C₁₂H₁₁NO₃S
• 分子量: 249.29
• InChiKey: LGKFPAIOOAUQQG-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.2
• 重原子数：
  17
• 可旋转键数：
  4
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.17
• 拓扑面积：
  70.9
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  甲基丙烯腈 、 but-2-enyl 2-thioxo-3H-benzoxazole-3-carboxylate 以 苯 为溶剂， 以61%的产率得到but-3-enyl 3'-cyano-3'-methylspiro[3H-benzoxazole-2,2'-thietane]-3-carboxylate
  参考文献：
  名称：

  Photocycloaddition Reactions of Alkyl and Aryl 2-Thioxo-3H-benzoxazole- 3-carboxylates to Alkenes

  摘要：

  The photochemical reactions of alkyl and aryl 2-thioxo-3H-benzoxazole-3-carboxylates 1 have been examined. Irradiation of 1 in the presence of tetra- and trisubstituted alkenes 2a and 2b, 2-methylprop-2-ene nitrile 2e, and dienes 2f and 2g gave [2+2] cycloadducts of the C=S bond of 2-thioxobenzoxazoles and the C=C bond of alkenes, spiro[benzoxazole-thietanes] 3, 4, 8-13, 15, 18, 20, 23-26 in moderate-to-good yields. The photoaddition reactions proceed in a regiospecific manner. The spirocyclic compounds obtained are indefinitely stable at room temperature. Irradiation of la in the presence of 1,1- and 1,2-disubstituted alkenes 2c and 2d yielded the products 5-7 of oxazole-ring cleavage. Compound 1d also underwent photoaddition with alkenes to yield spiro[benzoxazole-thietanes] and/or 2-substituted benzoxazoles and/or iminothietanes, depending on the nature of the substituents present in the alkenes. On intramolecular [2 + 2] photoadduct, tetracyclic 27, was obtained, when ethenyl 2-thioxobenzoxazole-3-carboxylate 1e was irradiated.

  DOI：

  10.1002/1522-2675(200208)85:8<2383::aid-hlca2383>3.0.co;2-e