2-methoxymethoxyhexanal | 872352-36-8

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 2-methoxymethoxyhexanal
• 英文别名: 2-(methoxymethoxy)hexanal
• CAS: 872352-36-8
• 化学式: C₈H₁₆O₃
• 分子量: 160.213
• InChiKey: WKRIAGOKGHUVCQ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.36
• 重原子数：
  11.0
• 可旋转键数：
  7.0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.88
• 拓扑面积：
  35.53
• 氢给体数：
  0.0
• 氢受体数：
  3.0

反应信息

• 作为反应物：
  描述：

  2-methoxymethoxyhexanal 在 对甲苯磺酸 作用下， 反应 1.0h， 生成 4-(1-bromoethenyl)-5-butyl-2,2-dimethyl-1,3-dioxolane
  参考文献：
  名称：

  1-Bromo-1-lithioethene:  A Practical Reagent in Organic Synthesis

  摘要：

  A reliable preparative scale synthesis of 1-bromo-1-lithioethene is reported. This reagent undergoes clean 1,2-addition with a range of aldehydes and ketones at -110 degrees C to afford the corresponding 2-bromo-1-alken-3-ols in moderate to excellent yield. Trapping with other electrophiles (acylsilanes, chlorosilanes, tributyltin chloride, iodine) cleanly provides practically useful yields of various 1-substituted 1-bromoethene products. Unexpectedly high diastereoselectivities were observed during the addition of 1-bromo-1-lithioethene to alpha-siloxy aldehydes (typically 10:1, Felkin-Ahn control) and protected ketopyranose and ketofuranose sugars (>= 10:1, addition from the less-hindered face). The title organolithium reagent possesses relatively low basicity at low temperature, and is compatible with a variety of common protecting groups. We believe that these unusual properties of 1-bronio-1-lithioethene may originate from the specific crystalline structure of the reagent in which lithium is coordinatively saturated and thus unavailable for chelation.

  DOI：

  10.1021/jo051125v
• 作为产物：
  描述：

  1-庚烯-3-醇 在 臭氧 、 N,N-二异丙基乙胺 作用下， 以 二氯甲烷 为溶剂， 反应 4.0h， 生成 2-methoxymethoxyhexanal
  参考文献：
  名称：

  1-Bromo-1-lithioethene:  A Practical Reagent in Organic Synthesis

  摘要：

  A reliable preparative scale synthesis of 1-bromo-1-lithioethene is reported. This reagent undergoes clean 1,2-addition with a range of aldehydes and ketones at -110 degrees C to afford the corresponding 2-bromo-1-alken-3-ols in moderate to excellent yield. Trapping with other electrophiles (acylsilanes, chlorosilanes, tributyltin chloride, iodine) cleanly provides practically useful yields of various 1-substituted 1-bromoethene products. Unexpectedly high diastereoselectivities were observed during the addition of 1-bromo-1-lithioethene to alpha-siloxy aldehydes (typically 10:1, Felkin-Ahn control) and protected ketopyranose and ketofuranose sugars (>= 10:1, addition from the less-hindered face). The title organolithium reagent possesses relatively low basicity at low temperature, and is compatible with a variety of common protecting groups. We believe that these unusual properties of 1-bronio-1-lithioethene may originate from the specific crystalline structure of the reagent in which lithium is coordinatively saturated and thus unavailable for chelation.

  DOI：

  10.1021/jo051125v