(3S,4R)-4-Hydroxy-3,4-dimethyl-dihydro-furan-2-one

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 内酯类
• 英文名称: (3S,4R)-4-Hydroxy-3,4-dimethyl-dihydro-furan-2-one
• 英文别名: (3S,4R)-4-hydroxy-3,4-dimethyloxolan-2-one
• 化学式: C₆H₁₀O₃
• 分子量: 130.144
• InChiKey: RKKZKDPLEWBYIY-XINAWCOVSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0
• 重原子数：
  9
• 可旋转键数：
  0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.83
• 拓扑面积：
  46.5
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  2,3-Dimethyl-but-3-enoic acid diisopropylamide 在 四氧化锇 、 四甲基乙二胺 、 硫酸 、 sodium hydrogensulfite 作用下， 以 1,4-二氧六环 为溶剂， 反应 4.0h， 生成 (3S,4R)-4-Hydroxy-3,4-dimethyl-dihydro-furan-2-one
  参考文献：
  名称：

  Diastereoselective Osmylation and Hydroboration of β,γ-Unsaturated N,N-Diisopropylamides and Acid-Catalyzed Conversion to δ-Lactones

  摘要：

  The title reactions of beta,gamma-unsaturated N,N-diisopropylamides occur with useful diastereofacial selectivity. The major diol isomer from osmylation of alkenes 1, 10, 11, and 12 in the presence of TMEDA at -78 degrees C corresponds to the facial preference shown in transition state model 41 (R-z = H), while the opposite preference for 42 is observed with the Z-alkene 13. (Table 1). Hydroboration with g-BBN does not show this inversion of diastereofacial selectivity for the Z-alkene. All of the results in Table 2 correspond to the usual preference for a transition state such as 45. Acid-catalyzed lactonization of the alcohols obtained in Tables 1 and 2 can be carried out with overall retention of configuration to afford delta-lactones. Butenolide 5 was prepared with 90% se from alcohol 2a via osmylation followed by acid-catalyzed lactonization to 3 and elimination using SOCl2/pyridine.

  DOI：

  10.1021/jo990119u

文献信息

• Diastereoselective Osmylation and Hydroboration of β,γ-Unsaturated <i>N,N</i>-Diisopropylamides and Acid-Catalyzed Conversion to δ-Lactones
  作者：E. Vedejs、A. W. Kruger

  DOI：10.1021/jo990119u

  日期：1999.6.1

  The title reactions of beta,gamma-unsaturated N,N-diisopropylamides occur with useful diastereofacial selectivity. The major diol isomer from osmylation of alkenes 1, 10, 11, and 12 in the presence of TMEDA at -78 degrees C corresponds to the facial preference shown in transition state model 41 (R-z = H), while the opposite preference for 42 is observed with the Z-alkene 13. (Table 1). Hydroboration with g-BBN does not show this inversion of diastereofacial selectivity for the Z-alkene. All of the results in Table 2 correspond to the usual preference for a transition state such as 45. Acid-catalyzed lactonization of the alcohols obtained in Tables 1 and 2 can be carried out with overall retention of configuration to afford delta-lactones. Butenolide 5 was prepared with 90% se from alcohol 2a via osmylation followed by acid-catalyzed lactonization to 3 and elimination using SOCl2/pyridine.