bis(1-methylethyl) (4R)-trans-2-methyl-2-(2-oxocyclohexyl)-1,3-dioxolan-4,5-dicarboxylate | 140631-16-9

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: bis(1-methylethyl) (4R)-trans-2-methyl-2-(2-oxocyclohexyl)-1,3-dioxolan-4,5-dicarboxylate
• 英文别名: dipropan-2-yl (4R,5R)-2-methyl-2-(2-oxocyclohexyl)-1,3-dioxolane-4,5-dicarboxylate
• CAS: 140631-16-9
• 化学式: C₁₈H₂₈O₇
• 分子量: 356.416
• InChiKey: XLMXTGZJNBKUAQ-JENMUQSASA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.15
• 重原子数：
  25.0
• 可旋转键数：
  5.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.83
• 拓扑面积：
  88.13
• 氢给体数：
  0.0
• 氢受体数：
  7.0

反应信息

• 作为产物：
  描述：

  L-(+)-酒石酸二异丙酯 在 硫酸 、 三氟化硼乙醚 作用下， 以 二氯甲烷 、 苯 为溶剂， 反应 4.0h， 生成 bis(1-methylethyl) (4R)-trans-2-methyl-2-(2-oxocyclohexyl)-1,3-dioxolan-4,5-dicarboxylate
  参考文献：
  名称：

  Chiral orthoesters in organic synthesis: Novel reagents for the enantioselective acylation of silylenolethers

  摘要：

  Dialkyl trans-2-alkoxy-2-alkyl-1,3-dioxolan-4,5-dicarboxylates and the corresponding N,N,N,N-tetramethyl-4,5-diamides have been prepared respectively from dialkyl tartrates or tartaric acid diamides. They smoothly reacted with silylenolethers in the presence of Lewis acids to give enantiomerically enriched (up to 90% d.e.) monoprotected 1,3-diketones. A dramatic dependence of the stereochemical outcome from the configuration of the enolic double bond of 4 has been observed. The products can be stereoselectively reduced to give configurationally defined monoprotected 3-ketols.

  DOI：

  10.1016/s0040-4020(01)90792-6

文献信息

• Novel enantioselective acylating agents. The reactions of chiral ortho esters and silylenol ethers as a route to optically active monoprotected 1,3-dicarbonyl compounds
  作者：Tiziana Basile、Luigi Longobardo、Emilio Tagliavini、Claudio Trombini、Achille Umani-Ronchi

  DOI：10.1039/c39900000759

  日期：——

  A novel enantioselective route to monoprotected 2-substituted-1,3-dicarbonyl compounds has been developed via acylation of silylenol ethers with chiral ortho esters derived from diethyl or di-isopropyl (R,R)-tartrates; good yields and stereoselectivity can be achieved starting from cyclic enolsilanes.

  通过将甲硅烷基醚与衍生自二乙基或二异丙基（R，R）-酒石酸酯的手性原酸酯酰化，开发了一种新的对映选择性路线，用于单保护的2-取代-1,3-二羰基化合物。从环状烯醇硅烷开始，可以获得良好的产率和立体选择性。