3-iodo-2-methoxy-6-methylenespiro[4.4]non-2-en-1-one | 220485-24-5

• 分子结构分类: 有机化合物 - 有机卤素化合物 - 乙烯基卤化物
• 英文名称: 3-iodo-2-methoxy-6-methylenespiro[4.4]non-2-en-1-one
• CAS: 220485-24-5
• 化学式: C₁₁H₁₃IO₂
• 分子量: 304.128
• InChiKey: IZMGAOWZURZILB-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.98
• 重原子数：
  14.0
• 可旋转键数：
  1.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.55
• 拓扑面积：
  26.3
• 氢给体数：
  0.0
• 氢受体数：
  2.0

反应信息

• 作为反应物：
  描述：

  3-iodo-2-methoxy-6-methylenespiro[4.4]non-2-en-1-one 在 四氧化锇 、 selenium(IV) oxide 、 N-甲基吲哚酮 、 水 、 sodium methylate 、 potassium carbonate 作用下， 以 四氢呋喃 、 1,4-二氧六环 、 叔丁醇 为溶剂， 生成 Dimethyl gloiosiphone A
  参考文献：
  名称：

  α-Carbonyl radical cyclization approach toward spiro[4.4]nonene: total synthesis of dimethyl gloiosiphone A

  摘要：

  通过δ-羰基自由基螺环化反应，实现了二甲基球形酮 A 2 的全合成。

  DOI：

  10.1039/a808455f
• 作为产物：
  描述：

  5-碘-1-戊炔 在 六正丁基二锡 、 sodium hydride 、 二甲基亚砜 、 间氯过氧苯甲酸 、 六甲基二硅氮烷 、 sodium iodide 、 lithium iodide 作用下， 以 四氢呋喃 、 二氯甲烷 、 N,N-二甲基甲酰胺 、 苯 为溶剂， 反应 50.34h， 生成 3-iodo-2-methoxy-6-methylenespiro[4.4]non-2-en-1-one
  参考文献：
  名称：

  Total Synthesis of Dimethyl Glolosiphone Aviaα-Carbonyl Radical Spiro-Cyclization

  摘要：

  AbstractA general approach toward spiro[4.4]nonane structure based on the α‐carbonyl radical cyclization has been developed. Efficient total synthesis of dimethyl gloiosiphone A (2) was achieved. Thus, alkylation of the anion of dimethylhydrazone of cyclopentanone with 5‐iodopent‐1‐yne followed by hydrolysis gave ketone 4. Iodination of 4 via its TMS‐enol ether yielded iodo ketone 7. Radical spiro‐cyclization of 7 gave spiro ketone 10. Iodination of 10 afford iodo spiro ketone 23. Oxidation and iodination of 23 gave compound 24. Methylation of 24 furnished methoxy iodo enone 25. Substitution of iodide in 25 with methoxide produced dimethoxy enone 26. Allylic oxidation of 26 gave diketone 27. Treatment of 27 with OsO4 and N‐methylmorpholine N‐oxide gave dihydroxy ketone 28. Methylation of the primary alcohol group in 28 afforded dimethyl gloiosiphone A (2).

  DOI：

  10.1002/jccs.199900064

文献信息

• α-Carbonyl radical cyclization approach toward spiro[4.4]nonene: total synthesis of dimethyl gloiosiphone A
  作者：Chin-Kang Sha、Wen-Yueh Ho

  DOI：10.1039/a808455f

  日期：——

  The total synthesis of dimethyl gloiosiphone A 2 was achieved via an α-carbonyl radical spirocyclization.

  通过δ-羰基自由基螺环化反应，实现了二甲基球形酮 A 2 的全合成。
• Total Synthesis of Dimethyl Glolosiphone A<i>via</i>α-Carbonyl Radical Spiro-Cyclization
  作者：Chin-Kang Sha、Wen-Yueh Ho

  DOI：10.1002/jccs.199900064

  日期：1999.6

  AbstractA general approach toward spiro[4.4]nonane structure based on the α‐carbonyl radical cyclization has been developed. Efficient total synthesis of dimethyl gloiosiphone A (2) was achieved. Thus, alkylation of the anion of dimethylhydrazone of cyclopentanone with 5‐iodopent‐1‐yne followed by hydrolysis gave ketone 4. Iodination of 4 via its TMS‐enol ether yielded iodo ketone 7. Radical spiro‐cyclization of 7 gave spiro ketone 10. Iodination of 10 afford iodo spiro ketone 23. Oxidation and iodination of 23 gave compound 24. Methylation of 24 furnished methoxy iodo enone 25. Substitution of iodide in 25 with methoxide produced dimethoxy enone 26. Allylic oxidation of 26 gave diketone 27. Treatment of 27 with OsO4 and N‐methylmorpholine N‐oxide gave dihydroxy ketone 28. Methylation of the primary alcohol group in 28 afforded dimethyl gloiosiphone A (2).