5-Cyclohex-1-enyl-1-methoxy-pentan-2-one

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 5-Cyclohex-1-enyl-1-methoxy-pentan-2-one
• 英文别名: 5-(Cyclohexen-1-yl)-1-methoxypentan-2-one
• 化学式: C₁₂H₂₀O₂
• 分子量: 196.29
• InChiKey: XROYDJSAUCPAPB-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.2
• 重原子数：
  14
• 可旋转键数：
  6
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.75
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为产物：
  描述：

  1-甲氧基丁-3-烯-2-酮 、 亚甲基环己烷 在 titanium(IV) isopropylate 、 四氯化钛 作用下， 以 二氯甲烷 为溶剂， 以11%的产率得到5-(1-Chloro-cyclohexyl)-1-methoxy-pentan-2-one
  参考文献：
  名称：

  Studies on the Synthesis of Acanthodoral and Nanaimoal:  Evaluation of Cationic Cyclization Routes

  摘要：

  Intramolecular Lewis acid-promoted reactions of alpha,beta-unsaturated ketone 6 and aldehydes 7 and 8 were examined as potential routes to acanthodoral (1), a structurally interesting natural product. Ketone 6 afforded ene product 22 exclusively, and both 7 and 8 gave mixtures of bicyclic aldehydes 3 and 26 and tricyclic aldehyde 25. The latter most likely results from 7 by intramolecular cyclization of the alkene onto the Lewis acid-activated carbonyl moiety affording carbocation 31 followed by a 1,2-hydride shift and ring closure. Starting from 8, tricyclic aldehyde 25 apparently forms by cyclization to cation 35 and ring closure to cyclobutane 36, followed by ring opening to 31, the same cation as formed in reactions of 7. Nanaimoal (3) results from loss of H+ from 31, and bicyclic aldehyde 26 may be formed in a similar manner or by a concerted ene reaction. The configuration of 25 establishes that the stereochemistry of the initial cyclization to 31 precludes the possible use of this strategy for the synthesis of acanthodoral. However, acid-promoted cyclization of allylic alcohol 23 efficiently gives diene 29 which undergoes selective hydroboration/oxidation to afford nanaimoal.

  DOI：

  10.1021/jo9610568