1-Ethoxy-2-ethoxymethyl-3-methyl-hept-2-en-5-yn-4-ol | 162292-85-5

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 1-Ethoxy-2-ethoxymethyl-3-methyl-hept-2-en-5-yn-4-ol
• CAS: 162292-85-5
• 化学式: C₁₃H₂₂O₃
• 分子量: 226.316
• InChiKey: FEBMCXHKXWAHFM-UHFFFAOYSA-N

物化性质

• 沸点：
  331.2±42.0 °C(predicted)
• 密度：
  0.982±0.06 g/cm3(Temp: 20 °C; Press: 760 Torr)(predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.76
• 重原子数：
  16.0
• 可旋转键数：
  7.0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.69
• 拓扑面积：
  38.69
• 氢给体数：
  1.0
• 氢受体数：
  3.0

反应信息

• 作为反应物：
  描述：

  1-Ethoxy-2-ethoxymethyl-3-methyl-hept-2-en-5-yn-4-ol 在 manganese(IV) oxide 作用下， 以 二氯甲烷 为溶剂， 反应 24.0h， 生成 1-Ethoxy-2-(ethoxymethyl)-3-methyl-2-hepten-5-yn-4-one
  参考文献：
  名称：

  Enynones in Organic Synthesis. 7. Substituent Effects on the .alpha.-Tocopherol-Catalyzed Cyclization of Enynones to Methylenecyclopentenones. Convenient Syntheses of Members of the Methylenomycin Class of Antibiotics

  摘要：

  Substituent effects on the a-tocopherol (vitamin E, 3b) catalyzed cyclization of a wide variety of enynones 1a-z to methylenecyclopentenones 7a-z have been examined, with particular emphasis given to electron-withdrawing and -donating groups at positions 2-4 and 6. In general, electron-withdrawing groups at positions 4 and 6 dramatically accelerate the cyclization process, while strong electron-donating groups at positions 3 and 4 completely inhibit reaction. Relatively little effect is exerted by groups at C-2, except for the methyl ester derivative 1i, which is totally unreactive. This methodology was employed in the syntheses of the methylenecyclopentenone antibiotics methylenomycin B (7a) and desepoxy-4,5-didehydromethylenomycin A (7z) and in formal syntheses of methylenomycin A (8) and xanthocidin (9).

  DOI：

  10.1021/jo00097a036
• 作为产物：
  描述：

  1,3-二乙氧基丙烷-2-酮 在 manganese(IV) oxide 、 lithium aluminium tetrahydride 、 正丁基锂 、 三苯基甲烷 作用下， 以 四氢呋喃 、 乙醚 、 正己烷 、 二氯甲烷 为溶剂， 反应 40.5h， 生成 1-Ethoxy-2-ethoxymethyl-3-methyl-hept-2-en-5-yn-4-ol
  参考文献：
  名称：

  Enynones in Organic Synthesis. 7. Substituent Effects on the .alpha.-Tocopherol-Catalyzed Cyclization of Enynones to Methylenecyclopentenones. Convenient Syntheses of Members of the Methylenomycin Class of Antibiotics

  摘要：

  Substituent effects on the a-tocopherol (vitamin E, 3b) catalyzed cyclization of a wide variety of enynones 1a-z to methylenecyclopentenones 7a-z have been examined, with particular emphasis given to electron-withdrawing and -donating groups at positions 2-4 and 6. In general, electron-withdrawing groups at positions 4 and 6 dramatically accelerate the cyclization process, while strong electron-donating groups at positions 3 and 4 completely inhibit reaction. Relatively little effect is exerted by groups at C-2, except for the methyl ester derivative 1i, which is totally unreactive. This methodology was employed in the syntheses of the methylenecyclopentenone antibiotics methylenomycin B (7a) and desepoxy-4,5-didehydromethylenomycin A (7z) and in formal syntheses of methylenomycin A (8) and xanthocidin (9).

  DOI：

  10.1021/jo00097a036