(+/-)-2,2-dimethyl-[1,3]dioxolan-4-ylmethyl heptanoate | 20620-20-6

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 英文名称: (+/-)-2,2-dimethyl-[1,3]dioxolan-4-ylmethyl heptanoate
• 英文别名: (2,2-dimethyl-1,3-dioxolane-4-yl)methyl heptanoate；(RS)-1,2-O-isopropylidene glycerol heptanoate；(2,2-Dimethyl-1,3-dioxolan-4-yl)methyl heptanoate；(2,2-dimethyl-1,3-dioxolan-4-yl)methyl heptanoate
• CAS: 20620-20-6
• 化学式: C₁₃H₂₄O₄
• 分子量: 244.331
• InChiKey: WXVNSIYHSSNMHW-UHFFFAOYSA-N

物化性质

• 沸点：
  301.5±22.0 °C(Predicted)
• 密度：
  0.980±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.8
• 重原子数：
  17
• 可旋转键数：
  8
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.92
• 拓扑面积：
  44.8
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  (+/-)-2,2-dimethyl-[1,3]dioxolan-4-ylmethyl heptanoate 在 phosphate buffer 、 Genzyme Diagnostics Pseudomonas cepacia lipase 作用下， 以 丙醇 为溶剂， 生成 (R)-2,2-dimethyl-[1,3]dioxolan-4-ylmethyl heptanoate 、 (S)-(+)-1,2-异亚丙基甘油 、 (R)-(-)-甘油醇缩丙酮 、 (S)-2,2-dimethyl-[1,3]dioxolan-4-ylmethyl heptanoate
  参考文献：
  名称：

  Highly enantioselective kinetic resolution of primary alcohols of the type Ph-X-CH(CH3)-CH2OH by Pseudomonas cepacia lipase: effect of acyl chain length and solvent

  摘要：

  Although lipase from Pseudomonas cepacia (PCL) shows high enantioselectivity towards many secondary alcohols, it usually exhibits only low to moderate enantioselectivity towards primary alcohols. To increase this enantioselectivity, we optimised the reaction conditions for the PCL-catalysed hydrolysis of esters of three chiral primary alcohols: 2-methyl-3-phenyl-1-propanol 1, 2-phenoxy-1-propanol 2 and solketal 3. The enantioselectivity towards 1-acetate increased from E=16 to 38 upon changing the solvent from ethyl ether/phosphate buffer to 30% n-propanol in phosphate buffer and increased again to E greater than or equal to 190 upon changing the substrate from 1-acetate to 1-heptanoate. The same changes increased the enantioselectivity towards alcohol 2 from E=17 to 70, but did not significantly increase the enantioselectivity towards alcohol 3. The best solvent was similar to the solvent used to crystallise the open form of PCL and likely stabilises the open form of PCL. This stabilisation may increase the enantioselectivity by removing kinetic contributions from a non-enantioselective lid-opening step. We determined the kinetic contribution of the lid-opening step by measuring the interfacial activation of PCL. The activation energy for the PCL-catalysed hydrolysis of ethyl acetate was at least 2.6 kcal/mol lower in the presence of a water-organic solvent interface. (C) 2003 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2003.09.049
• 作为产物：
  描述：

  庚酰氯 、 丙酮缩甘油 在 吡啶 作用下， 以 乙醚 为溶剂， 反应 2.0h， 以92%的产率得到(+/-)-2,2-dimethyl-[1,3]dioxolan-4-ylmethyl heptanoate
  参考文献：
  名称：

  Highly enantioselective kinetic resolution of primary alcohols of the type Ph-X-CH(CH3)-CH2OH by Pseudomonas cepacia lipase: effect of acyl chain length and solvent

  摘要：

  Although lipase from Pseudomonas cepacia (PCL) shows high enantioselectivity towards many secondary alcohols, it usually exhibits only low to moderate enantioselectivity towards primary alcohols. To increase this enantioselectivity, we optimised the reaction conditions for the PCL-catalysed hydrolysis of esters of three chiral primary alcohols: 2-methyl-3-phenyl-1-propanol 1, 2-phenoxy-1-propanol 2 and solketal 3. The enantioselectivity towards 1-acetate increased from E=16 to 38 upon changing the solvent from ethyl ether/phosphate buffer to 30% n-propanol in phosphate buffer and increased again to E greater than or equal to 190 upon changing the substrate from 1-acetate to 1-heptanoate. The same changes increased the enantioselectivity towards alcohol 2 from E=17 to 70, but did not significantly increase the enantioselectivity towards alcohol 3. The best solvent was similar to the solvent used to crystallise the open form of PCL and likely stabilises the open form of PCL. This stabilisation may increase the enantioselectivity by removing kinetic contributions from a non-enantioselective lid-opening step. We determined the kinetic contribution of the lid-opening step by measuring the interfacial activation of PCL. The activation energy for the PCL-catalysed hydrolysis of ethyl acetate was at least 2.6 kcal/mol lower in the presence of a water-organic solvent interface. (C) 2003 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2003.09.049

文献信息

• Lipase-mediated desymmetrization of glycerol with aromatic and aliphatic anhydrides
  作者：Daniela I. Batovska、Shuichirou Tsubota、Yasuo Kato、Yasuhisa Asano、Makoto Ubukata

  DOI：10.1016/j.tetasy.2004.09.033

  日期：2004.11

  Chirazyme L-2 (Candida antarctica) catalyzed esterification of glycerol with aromatic and aliphatic anhydrides in 1,4-dioxane is described. All the aromatic monoacylglycerols (MAGs) were produced as (R)-enantiomers, while aliphatic MAGs were obtained either as racemic mixtures or the (S)-enantiomers. The influence of substituted aromatic rings, chain length, and presence of a conjugated double bond in the acyl donor moiety on the enantiotopic selectivity as well as the efficiency of the enzyme was studied. (C) 2004 Elsevier Ltd. All rights reserved.
• Enhanced enantioselectivity of Bacillus coagulans in the hydrolysis of 1,2-O-isopropylidene glycerol esters by thermal knock-out of undesired enzymes
  作者：Diego Romano、Francesco Falcioni、Diego Mora、Francesco Molinari、Andreas Buthe、Marion Ansorge-Schumacher

  DOI：10.1016/j.tetasy.2004.12.021

  日期：2005.2

  The enantioselective hydrolysis of different (RS)-1,2-O-isopropylidene glycerol esters has been achieved with whole cells of Bacillus coagulans NCIMB 9365 furnishing the (S)-alcohol as the major enantiomer. The reaction is catalysed by a thermostable cell-bound carboxylesterase and improvement of the enantioselectivity has been achieved by heat treatment of the whole cells, which causes the knock-outs a non-enantioselective competing enzyme. Thermally-treated cells hydrolysed (RS)-1,2-O-isopropylidene glycerol esters with high enantioselectivity, the highest enantiomeric ratio (80-100) being observed for the benzoate. The biocatalyst displayed good stability and could be re-used after filtration for 12 cycles before showing significant loss of activity; repeated biotransformation batches allowed the recovery of 9.55 g/L of enantiomerically pure (S)-isopropylideneglycerol benzoate starting from 24.0 g/L of the racemic mixture. (C) 2005 Elsevier Ltd. All rights reserved.
• Highly enantioselective kinetic resolution of primary alcohols of the type Ph-X-CH(CH3)-CH2OH by Pseudomonas cepacia lipase: effect of acyl chain length and solvent
  作者：Alessandra Mezzetti、Curtis Keith、Romas J. Kazlauskas

  DOI：10.1016/j.tetasy.2003.09.049

  日期：2003.12

  Although lipase from Pseudomonas cepacia (PCL) shows high enantioselectivity towards many secondary alcohols, it usually exhibits only low to moderate enantioselectivity towards primary alcohols. To increase this enantioselectivity, we optimised the reaction conditions for the PCL-catalysed hydrolysis of esters of three chiral primary alcohols: 2-methyl-3-phenyl-1-propanol 1, 2-phenoxy-1-propanol 2 and solketal 3. The enantioselectivity towards 1-acetate increased from E=16 to 38 upon changing the solvent from ethyl ether/phosphate buffer to 30% n-propanol in phosphate buffer and increased again to E greater than or equal to 190 upon changing the substrate from 1-acetate to 1-heptanoate. The same changes increased the enantioselectivity towards alcohol 2 from E=17 to 70, but did not significantly increase the enantioselectivity towards alcohol 3. The best solvent was similar to the solvent used to crystallise the open form of PCL and likely stabilises the open form of PCL. This stabilisation may increase the enantioselectivity by removing kinetic contributions from a non-enantioselective lid-opening step. We determined the kinetic contribution of the lid-opening step by measuring the interfacial activation of PCL. The activation energy for the PCL-catalysed hydrolysis of ethyl acetate was at least 2.6 kcal/mol lower in the presence of a water-organic solvent interface. (C) 2003 Elsevier Ltd. All rights reserved.