(4aS,5S)-5-Methoxy-4a-methyl-4,4a,5,6,7,8-hexahydro-3H-naphthalen-2-one | 135878-03-4

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: (4aS,5S)-5-Methoxy-4a-methyl-4,4a,5,6,7,8-hexahydro-3H-naphthalen-2-one
• 英文别名: (4aS,5S)-5-methoxy-4a-methyl-3,4,5,6,7,8-hexahydronaphthalen-2-one
• CAS: 135878-03-4
• 化学式: C₁₂H₁₈O₂
• 分子量: 194.274
• InChiKey: HQVHVCPUAGSRRZ-RYUDHWBXSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.5
• 重原子数：
  14
• 可旋转键数：
  1
• 环数：
  2.0
• 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

• 作为反应物：
  描述：

  (4aS,5S)-5-Methoxy-4a-methyl-4,4a,5,6,7,8-hexahydro-3H-naphthalen-2-one 在 双氧水 、 lithium diisopropyl amide 作用下， 以 水 、 乙酸乙酯 为溶剂， 反应 5.25h， 生成 4-(2-methyl-5-hydroxyphenyl)butanal
  参考文献：
  名称：

  Synthesis and photochemical rearrangements of bicyclic cross-conjugated cyclohexadienones containing .delta.-oxy substituents

  摘要：

  Several 6/5-fused cross-conjugated cyclohexadienones containing delta-oxy substituents on the B ring including the benzoyl, SEM, and TBDPS hydroxyl-protected systems 12b, 12f, and 12g were prepared from the corresponding enones by the phenylselenenylation-selenoxide elimination procedure. Attempted preparation of dienones 12a, 12c, and 12d containing tert-butyl, methyl, and trimethylsilyl hydroxyl-protecting groups failed. Instead, the phenolic aldehyde 13 was obtained after workup or column chromatography on silica gel. The THP-protected dienone 12e could be purified and characterized, but it gave aldehyde 13 on standing in acetic acid at room temperature. Irradiations of dienones 12b, 12f, and 12g in glacial acetic acid using a high-pressure mercury lamp housed in a Pyrex probe gave mixtures containing several photoproducts. The corresponding 5/6-fused acetoxy ketones 22a, 22c, and 22b were the major products in each case. The 5/6-fused hydroxy ketone 23 was also obtained from dienone 22a. Mixtures of tricyclic ketones of the type 27 and 28 resulting from rare examples of trapping of Zimmerman-Schuster cyclopropyl carbocation intermediates, i.e., 26, by the solvent were also obtained from all three dienones. Dienones 12g and 12f also gave tricyclic acetoxy ketones 31a and 31b, which presumably arose via a 1,4-sigmatropic rearrangement of an excited-state precursor of 26.

  DOI：

  10.1021/jo00022a018

文献信息

• Steric and complexation effects on the 1,4-addition reaction of lithium dimethylcuprate with rigid α,β-unsaturated ketones
  作者：A.Samuel Vellekoop、Robin A.J. Smith

  DOI：10.1016/s0040-4020(98)83052-4

  日期：1998.9

  Reaction of lithium dimethylcuprate with a series of substituted 10-methyl-1(9)-octal-2-ones in diethyl ether give 1,4-addition products with the same ring junction stereochemistry as the parent, unsubstituted α,β-unsaturated ketone. The reactivity of the system is modified by groups positioned axially and 1,3 with respect to the β-carbon of the enone. Alkoxy substituents are generally activating,

  甲基二甲基碳酸锂与一系列取代的10-甲基-1（9）-辛-2-酮在乙醚中的反应生成1,4-加成产物，其环结立体化学与母体相同，未取代的α，β-不饱和酮。相对于烯酮的β-碳，通过轴向定位的基团和1,3修饰了系统的反应性。烷氧基取代基通常是活化的，特别是如果它们相对于引入的甲基是顺式的。