1-(3,5-dimethylphenyl)ethane-1,2-diol | 880498-12-4

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 1-(3,5-dimethylphenyl)ethane-1,2-diol
• 英文别名: 1-(3,5-Dimethylphenyl)ethane-1,2-diol
• CAS: 880498-12-4
• 化学式: C₁₀H₁₄O₂
• 分子量: 166.22
• InChiKey: ADLFAFRZFUHITB-UHFFFAOYSA-N

物化性质

• 熔点：
  49-51 °C(Solv: hexane (110-54-3); ethyl acetate (141-78-6))
• 沸点：
  318.3±37.0 °C(Predicted)
• 密度：
  1.104±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.1
• 重原子数：
  12
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.4
• 拓扑面积：
  40.5
• 氢给体数：
  2
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  1-(3,5-dimethylphenyl)ethane-1,2-diol 在 Lipase QL ammonium cerium(IV) nitrate 、 sodium hydride 、 对甲苯磺酸 、 乙硫醇 作用下， 以 四氢呋喃 、 甲醇 、 环己烷 、 N,N-二甲基甲酰胺 、 乙腈 为溶剂， 反应 95.0h， 生成 (5S,13S)-(+)-5,13-bis(3,5-dimethylphenyl)-3,6,9,12,15-pentaoxabicyclo[15.3.1]heneicosa-17,20(1)-diene-19,21-dione
  参考文献：
  名称：

  Remarkable Effect of Subtle Structural Change of Chiral Pseudo-18-Crown-6 on Enantiomer-Selectivity in Complexation with Chiral Amino Alcohols

  摘要：

  Chiral receptors [(S,S)-1] and [(S,S,S,S)-2] having 1,2-dialkoxy-1-(3,5-dimethylphenyl)ethane and 1,2-dialkoxy-1-(3,5-dimethyl phenyl)cyclohexane as chiral building blocks, respectively, were prepared. Thermodynamic parameters of complexations of these and structurally related receptors [(S,S)-3] and [(S,S,S,S)-4] with 2-amino-1-propanol (5), 2-amino-2-phenylethanol (6), and 3-methylbutan-1-ol (7) in chloroform were determined. It was found that the host-guest systems that have same enantiomer-selectivity at 25 degrees C showed opposite selectivity in the enthalpy term. For example, complexations of both (SS)-1 and (SS)-3 with 5 are R-selective at 25 degrees C (Delta Delta G = 2.2 and 3.8 kJ mol(-1), respectively), whereas In terms of the enthalpy of complexation the former is S-selective (Delta Delta H = 22 kJ mol(-1)) but the latter is R-selective (Delta Delta H = 10 kJ mol(-1)).

  DOI：

  10.3987/com-05-s(k)42
• 作为产物：
  描述：

  1-乙烯基-3,5-二甲基-苯 在 四氧化锇 、 N-甲基吗啉氧化物 作用下， 以 水 、 叔丁醇 为溶剂， 反应 3.0h， 以90%的产率得到1-(3,5-dimethylphenyl)ethane-1,2-diol
  参考文献：
  名称：

  Remarkable Effect of Subtle Structural Change of Chiral Pseudo-18-Crown-6 on Enantiomer-Selectivity in Complexation with Chiral Amino Alcohols

  摘要：

  Chiral receptors [(S,S)-1] and [(S,S,S,S)-2] having 1,2-dialkoxy-1-(3,5-dimethylphenyl)ethane and 1,2-dialkoxy-1-(3,5-dimethyl phenyl)cyclohexane as chiral building blocks, respectively, were prepared. Thermodynamic parameters of complexations of these and structurally related receptors [(S,S)-3] and [(S,S,S,S)-4] with 2-amino-1-propanol (5), 2-amino-2-phenylethanol (6), and 3-methylbutan-1-ol (7) in chloroform were determined. It was found that the host-guest systems that have same enantiomer-selectivity at 25 degrees C showed opposite selectivity in the enthalpy term. For example, complexations of both (SS)-1 and (SS)-3 with 5 are R-selective at 25 degrees C (Delta Delta G = 2.2 and 3.8 kJ mol(-1), respectively), whereas In terms of the enthalpy of complexation the former is S-selective (Delta Delta H = 22 kJ mol(-1)) but the latter is R-selective (Delta Delta H = 10 kJ mol(-1)).

  DOI：

  10.3987/com-05-s(k)42

文献信息

• Ru-MACHO-Catalyzed Highly Chemoselective Hydrogenation of α-Keto Esters to 1,2-Diols or α-Hydroxy Esters
  作者：Weijun Tang、Jianliang Xiao、Shaochan Gao、Minghui Zhang、Chao Wang

  DOI：10.1055/s-0035-1561971

  日期：——

  catalyst has been shown to be highly effective for the hydrogenation of a wide range of α-keto esters, affording either diols or hydroxy esters depending on the choice of reaction conditions. Strong base, high temperature, and pressure favor the formation of diols whilst the opposite is true for the hydroxy esters.

  钌钳状催化剂已被证明对广泛范围的α-酮酯的氢化非常有效，根据反应条件的选择提供二醇或羟基酯。强碱、高温和压力有利于二醇的形成，而羟基酯则相反。
• 10.1039/d4cc01695e
  作者：Tao, Li、Wang, He、Liu, Xiao-Fei、Ren, Wei-Min、Lu, Xiao-Bing、Zhang, Wen-Zhen

  DOI：10.1039/d4cc01695e

  日期：——

  ring-opening carboxylation of styrene carbonates with CO2 to achieve dicarboxylic acids and/or β-hydroxy acids has been developed via the selective cleavage of the C(sp3)–O bond in cyclic carbonates. The product selectivity is probably determined by the stability and reactivity of the key benzylic radical and carbanion intermediate.

  通过选择性裂解环状碳酸酯中的 C(sp 3 )–O 键，开发了苯乙烯碳酸酯与 CO 2的电还原开环羧化以获得二羧酸和/或β-羟基酸。产物选择性可能由关键的苄基和碳负离子中间体的稳定性和反应性决定。
• Remarkable Effect of Subtle Structural Change of Chiral Pseudo-18-Crown-6 on Enantiomer-Selectivity in Complexation with Chiral Amino Alcohols
  作者：Keiji Hirose、Yoshito Tobe、Pakatip Aksharanandana、Michiko Suzuki、Kiyoshi Wada、Koichiro Naemura

  DOI：10.3987/com-05-s(k)42

  日期：——

  Chiral receptors [(S,S)-1] and [(S,S,S,S)-2] having 1,2-dialkoxy-1-(3,5-dimethylphenyl)ethane and 1,2-dialkoxy-1-(3,5-dimethyl phenyl)cyclohexane as chiral building blocks, respectively, were prepared. Thermodynamic parameters of complexations of these and structurally related receptors [(S,S)-3] and [(S,S,S,S)-4] with 2-amino-1-propanol (5), 2-amino-2-phenylethanol (6), and 3-methylbutan-1-ol (7) in chloroform were determined. It was found that the host-guest systems that have same enantiomer-selectivity at 25 degrees C showed opposite selectivity in the enthalpy term. For example, complexations of both (SS)-1 and (SS)-3 with 5 are R-selective at 25 degrees C (Delta Delta G = 2.2 and 3.8 kJ mol(-1), respectively), whereas In terms of the enthalpy of complexation the former is S-selective (Delta Delta H = 22 kJ mol(-1)) but the latter is R-selective (Delta Delta H = 10 kJ mol(-1)).