3,3-bis{4-[(tert-butyl)dimethylsilyloxy]-3,5-dimethylphenyl}pentane-1,5-diyl bis(methanesulfonate) | 247941-91-9

• 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: 3,3-bis{4-[(tert-butyl)dimethylsilyloxy]-3,5-dimethylphenyl}pentane-1,5-diyl bis(methanesulfonate)
• CAS: 247941-91-9
• 化学式: C₃₅H₆₀O₈S₂Si₂
• 分子量: 729.16
• InChiKey: KTGFLDLOLQPLKX-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  8.71
• 重原子数：
  47.0
• 可旋转键数：
  14.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.66
• 拓扑面积：
  105.2
• 氢给体数：
  0.0
• 氢受体数：
  8.0

反应信息

• 作为反应物：
  描述：

  3,3-bis{4-[(tert-butyl)dimethylsilyloxy]-3,5-dimethylphenyl}pentane-1,5-diyl bis(methanesulfonate) 在 硫酸 、 potassium iodide 作用下， 以 二甲基亚砜 为溶剂， 反应 80.0h， 生成 diethyl 4,4-bis(4-hydroxy-3,5-dimethylphenyl)heptanedioate
  参考文献：
  名称：

  Catalytic Dendrophanes as Enzyme Mimics: Synthesis, Binding Properties, Micropolarity Effect, and Catalytic Activity of Dendritic Thiazolio-cyclophanes

  摘要：

  Catalytic dendrophanes 9 and 10 were prepared as functional mimics of the thiamine-diphosphate-dependent enzyme pyruvate oxidase, and studied as catalysts in the oxidation of naphthalene-2-carbaldehyde (4) to methyl naphthalene-2-carboxylate (8) (Scheme 1). They are composed of a thiazolio-cyclophane initiator core with four generation-2 (G-2) poly(etheramide) dendrons attached. The two dendrophanes were synthesized by a convergent growth strategy by coupling dendrons 11 and 12, respectively (Scheme 2), with (chloromethyl)-cyclophane 42 (Scheme 5) and subsequent conversion with 4-methylthiaaole (Scheme 7). The X-ray crystal structures of cyclophane precursors 30 (Scheme 3), 37 and 38 (Scheme 5) on the way to dendrophanes were determined (Fig. I). The crystal-structure analysis of the benzene clathrate of 37 revealed the formation of channel-like stacks by the cyclophane which incorporate its morpholinomethyl side chain and the enclathrated benzene molecule (Fig. 2). The interactions of the enclathrated benzene molecule with the phenyl rings of the two adjacent cyclophane molecules in the stack closely resemble those between neighboring benzene molecules in crystalline benzene (Fig. 3). The characterization by MALDI-TOF-MS (Fig. 4) and H-1- and C-13-NMR spectroscopy (Fig. 5) proved the monodispersity of the G-2 dendrophanes 9 and 10 with molecular weights up to 11500 Da (Eor 10). H-1-NMR and fluorescence binding titrations in H2O and aqueous MeOH showed that 9 and 10 form stable 1:1 complexes with naphthalene-2-carbaldehyde (4) and 6-(p-toluidino)naphthalene-2-sulfonate (48, TNS) (Tables 1 and 2). The evaluation of the fluorescence-emission maxima of bound TNS revealed that the dendritic branching creates a microenvironment of distinctly reduced polarity at the cyclophane core by limiting its exposure to bulk solvent. Initial rate studies for the oxidation of naphthalene-2-carbaldehyde to methyl naphthalene-2-carboxylate in basic aqueous MeOH in the presence of flavin derivative 6 revealed only a weak catalytic activity of dendrophanes 9 and 10 (Table 3), despite the favorable micropolarity at the cyclophane active site. The low catalytic activity in the interior of the macromolecules was explained by steric hindrance of reaction transition states by the dendritic branches.

  DOI：

  10.1002/(sici)1522-2675(19990707)82:7<1066::aid-hlca1066>3.0.co;2-o
• 作为产物：
  描述：

  diethyl 3,3-bis{4-[(tert-butyl)dimethylsilyloxy]-3,5-dimethylphenyl}pentanedioate 在 lithium aluminium tetrahydride 、 三乙胺 作用下， 以 乙醚 、 二氯甲烷 为溶剂， 反应 8.0h， 生成 3,3-bis{4-[(tert-butyl)dimethylsilyloxy]-3,5-dimethylphenyl}pentane-1,5-diyl bis(methanesulfonate)
  参考文献：
  名称：

  Catalytic Dendrophanes as Enzyme Mimics: Synthesis, Binding Properties, Micropolarity Effect, and Catalytic Activity of Dendritic Thiazolio-cyclophanes

  摘要：

  Catalytic dendrophanes 9 and 10 were prepared as functional mimics of the thiamine-diphosphate-dependent enzyme pyruvate oxidase, and studied as catalysts in the oxidation of naphthalene-2-carbaldehyde (4) to methyl naphthalene-2-carboxylate (8) (Scheme 1). They are composed of a thiazolio-cyclophane initiator core with four generation-2 (G-2) poly(etheramide) dendrons attached. The two dendrophanes were synthesized by a convergent growth strategy by coupling dendrons 11 and 12, respectively (Scheme 2), with (chloromethyl)-cyclophane 42 (Scheme 5) and subsequent conversion with 4-methylthiaaole (Scheme 7). The X-ray crystal structures of cyclophane precursors 30 (Scheme 3), 37 and 38 (Scheme 5) on the way to dendrophanes were determined (Fig. I). The crystal-structure analysis of the benzene clathrate of 37 revealed the formation of channel-like stacks by the cyclophane which incorporate its morpholinomethyl side chain and the enclathrated benzene molecule (Fig. 2). The interactions of the enclathrated benzene molecule with the phenyl rings of the two adjacent cyclophane molecules in the stack closely resemble those between neighboring benzene molecules in crystalline benzene (Fig. 3). The characterization by MALDI-TOF-MS (Fig. 4) and H-1- and C-13-NMR spectroscopy (Fig. 5) proved the monodispersity of the G-2 dendrophanes 9 and 10 with molecular weights up to 11500 Da (Eor 10). H-1-NMR and fluorescence binding titrations in H2O and aqueous MeOH showed that 9 and 10 form stable 1:1 complexes with naphthalene-2-carbaldehyde (4) and 6-(p-toluidino)naphthalene-2-sulfonate (48, TNS) (Tables 1 and 2). The evaluation of the fluorescence-emission maxima of bound TNS revealed that the dendritic branching creates a microenvironment of distinctly reduced polarity at the cyclophane core by limiting its exposure to bulk solvent. Initial rate studies for the oxidation of naphthalene-2-carbaldehyde to methyl naphthalene-2-carboxylate in basic aqueous MeOH in the presence of flavin derivative 6 revealed only a weak catalytic activity of dendrophanes 9 and 10 (Table 3), despite the favorable micropolarity at the cyclophane active site. The low catalytic activity in the interior of the macromolecules was explained by steric hindrance of reaction transition states by the dendritic branches.

  DOI：

  10.1002/(sici)1522-2675(19990707)82:7<1066::aid-hlca1066>3.0.co;2-o