(E)-1-(1,3-dithiolan-2-ylidene)-5,5-dimethylhex-3-en-2-one | 133286-34-7

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 乙烯基硫酯
• 英文名称: (E)-1-(1,3-dithiolan-2-ylidene)-5,5-dimethylhex-3-en-2-one
• CAS: 133286-34-7
• 化学式: C₁₁H₁₆OS₂
• 分子量: 228.379
• InChiKey: SZSWKFZNQFZZNF-SNAWJCMRSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.3
• 重原子数：
  14
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.55
• 拓扑面积：
  67.7
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  聚合甲醛 、 (E)-1-(1,3-dithiolan-2-ylidene)-5,5-dimethylhex-3-en-2-one 、 5,5-二甲基-1,3-环己二酮 在 溶剂黄146 作用下， 以 四氢呋喃 、 水 为溶剂， 反应 1.5h， 以66%的产率得到(E)-2-(2-(1,3-dithiolan-2-ylidene)-6,6-dimethyl-3-oxohept-4-enyl)-5,5-dimethylcyclohexane-1,3-dione
  参考文献：
  名称：

  α-Alkenoyl Ketene S,S-Acetal-Based Multicomponent Reaction: An Efficient Approach for the Selective Construction of Polyfunctionalized Cyclohexanones

  摘要：

  A versatile multicomponent reaction based on the new four-carbon synthons alpha-alkenoyl ketene S,S-acetals 1 has been developed. This three-component reaction of readily available alpha-alkenoyl ketene S,S-acetals 1 with aldehydes 2 and active methylene compounds 3 proceeds smoothly in acidic medium (glacial acetic acid in tetrahydrofuran) to give various polyfunctionalized cyclohexanones 4, 5, and 6 in a highly regio- and diastereoselective manner with good to excellent yields. The reaction can tolerate a broad range of substituents in the three components involved and is proposed to proceed via a tandem Knoevenagel-intermolecular Michael-intramolecular Michael sequence. As an extension of the synthetic application of polyfunctionalized cyclohexanones obtained, unsymmetrical biaryls 7 were synthesized in almost quantitative yields by simple transformations of the corresponding cycloadducts 6.

  DOI：

  10.1021/jo900217g
• 作为产物：
  描述：

  6-tert-butyl-3-(1,3-dithiolan-2-ylidene)oxane-2,4-dione 在 乙醇 、 sodium hydride 作用下， 以 四氢呋喃 为溶剂， 反应 0.25h， 生成 (E)-1-(1,3-dithiolan-2-ylidene)-5,5-dimethylhex-3-en-2-one
  参考文献：
  名称：

  A Novel Route to Alkenoyl- and Cinnamoylketene Dithioacetals

  摘要：

  2-乙酰基(乙氧羰基)亚甲基-1,3-二硫杂环戊烷和-二硫杂环己烷（1）与各种醛或酮缩合，以高产率得到相应的取代的2-(1-羧基-2-氧代-3-丁烯亚基)-1,3-二硫杂环戊烷和-二硫杂环己烷4，这些化合物在加热下顺利脱羧，以高产率得到标题化合物。

  DOI：

  10.1055/s-1991-26366

文献信息

• A Novel Route to Alkenoyl- and Cinnamoylketene Dithioacetals
  作者：Eun Bok Choi、In Kwon Youn、Chwang Siek Pak

  DOI：10.1055/s-1991-26366

  日期：——

  2-Acetyl(ethoxycarbonyl)methylene-1,3-dithietane and -dithiane (1) were condensed with various aldehydes or ketones to afford high yields of the corresponding substituted 2-(1-carboxy-2-oxo-3-butenylidene)-1,3-dithietanes and -dithianes 4, which upon heating decarboxylated smoothly to give the title compounds in high yield.

  2-乙酰基(乙氧羰基)亚甲基-1,3-二硫杂环戊烷和-二硫杂环己烷（1）与各种醛或酮缩合，以高产率得到相应的取代的2-(1-羧基-2-氧代-3-丁烯亚基)-1,3-二硫杂环戊烷和-二硫杂环己烷4，这些化合物在加热下顺利脱羧，以高产率得到标题化合物。
• α-Alkenoyl Ketene <i>S</i>,<i>S</i>-Acetal-Based Multicomponent Reaction: An Efficient Approach for the Selective Construction of Polyfunctionalized Cyclohexanones
  作者：Yuhui Ma、Mang Wang、Dan Li、Bahargul Bekturhun、Jun Liu、Qun Liu

  DOI：10.1021/jo900217g

  日期：2009.4.17

  A versatile multicomponent reaction based on the new four-carbon synthons alpha-alkenoyl ketene S,S-acetals 1 has been developed. This three-component reaction of readily available alpha-alkenoyl ketene S,S-acetals 1 with aldehydes 2 and active methylene compounds 3 proceeds smoothly in acidic medium (glacial acetic acid in tetrahydrofuran) to give various polyfunctionalized cyclohexanones 4, 5, and 6 in a highly regio- and diastereoselective manner with good to excellent yields. The reaction can tolerate a broad range of substituents in the three components involved and is proposed to proceed via a tandem Knoevenagel-intermolecular Michael-intramolecular Michael sequence. As an extension of the synthetic application of polyfunctionalized cyclohexanones obtained, unsymmetrical biaryls 7 were synthesized in almost quantitative yields by simple transformations of the corresponding cycloadducts 6.