(R)-S-t-butyl (4-chlorophenyl)-hydroxythioacetate

• 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: (R)-S-t-butyl (4-chlorophenyl)-hydroxythioacetate
• 英文别名: S-tert-butyl (2R)-2-(4-chlorophenyl)-2-hydroxyethanethioate
• 化学式: C₁₂H₁₅ClO₂S
• 分子量: 258.769
• InChiKey: DNPIWXVOPTUKCB-SNVBAGLBSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.3
• 重原子数：
  16
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.42
• 拓扑面积：
  62.6
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  (4-氯苯基)乙醛酸 在 chiral vanadium(V) sodium tetrahydroborate 、 草酰氯 、 氧气 、 三乙胺 作用下， 以 四氢呋喃 、 二氯甲烷 、 甲苯 为溶剂， 反应 80.5h， 生成 (R)-S-t-butyl (4-chlorophenyl)-hydroxythioacetate
  参考文献：
  名称：

  Asymmetric Aerobic Oxidation of α-Hydroxy Acid Derivatives by C₄-Symmetric, Vanadate-Centered, Tetrakisvanadyl(V) Clusters Derived from N-Salicylidene-α-aminocarboxylates

  摘要：

  A series of chiral vanadyl(V) methoxides bearing 3-t-butyl-5-substituted N-salicylene-L-valinate and L-t-leucinate as chiral auxiliaries has been prepared. In all cases except the 3,5-di-t-butyl analogue, they exist as monomers both in solution and in the single crystal state. In the case of the 3,5-di-t-butyl analogue, the architectural nature of the vanadyl(V) complex highly depends on the base used during the complex formation event. A pentanuclear C-4-symmetric complex was formed when potassium salts were employed instead of the corresponding sodium salts. A central vanadate(V) unit serves to grip four identical chiral monomeric vanadyl(V) units together, by which a potassium ion sits on top of the four flanking units through carbonyl coordinations and serves to hold the whole cluster by cooperation with the central vanadate(V) unit. In comparison with the corresponding monomeric vanadyl(V) methoxide complex, the cluster complex was utilized to facilitate the asymmetric aerobic oxidations of various racemic alpha-hydroxyesters, -amides, and -thioesters with excellent selectivity factors (k(rel) 40 to >500).

  DOI：

  10.1021/jo070575f

文献信息

• Bio-inspired Water-Driven Catalytic Enantioselective Protonation
  作者：Si Joon Park、In-Soo Hwang、Young Jun Chang、Choong Eui Song

  DOI：10.1021/jacs.0c11815

  日期：2021.2.17

  hemithioacetals which proceeds via enantioselective protonation of an ene-diol intermediate. The use of on-water condition turns on this otherwise extremely unreactive catalytic reaction as a result of the strengthened hydrogen bonds of water molecules near the hydrophobic reaction mixture. Furthermore, under on-water conditions, especially under biphasic microfluidic on-water conditions, access of bulk water into

  水中前手性碳负离子的催化对映选择性质子化是生物系统中的一种常见转化，但由于质子在水中异常快速的运动会导致不受控制的外消旋质子化，因此这超出了合成化学家的能力。在这里，我们展示了水的关键作用，它能够通过烯二醇中间体的对映选择性质子化进行半硫缩醛的高度对映选择性乙二醛酶 I 模拟催化异构化。由于疏水反应混合物附近的水分子的氢键增强，因此水上条件的使用开启了这种原本极其不活泼的催化反应。此外，在水上条件下，特别是在双相微流体水上条件下，
• Asymmetric Aerobic Oxidation of α-Hydroxy Acid Derivatives by <i>C</i>₄-Symmetric, Vanadate-Centered, Tetrakisvanadyl(V) Clusters Derived from <i>N</i>-Salicylidene-α-aminocarboxylates
  作者：Chien-Tien Chen、Sampada Bettigeri、Shiue-Shien Weng、Vijay D. Pawar、Ya-Hui Lin、Cheng-Yuan Liu、Way-Zen Lee

  DOI：10.1021/jo070575f

  日期：2007.10.1

  A series of chiral vanadyl(V) methoxides bearing 3-t-butyl-5-substituted N-salicylene-L-valinate and L-t-leucinate as chiral auxiliaries has been prepared. In all cases except the 3,5-di-t-butyl analogue, they exist as monomers both in solution and in the single crystal state. In the case of the 3,5-di-t-butyl analogue, the architectural nature of the vanadyl(V) complex highly depends on the base used during the complex formation event. A pentanuclear C-4-symmetric complex was formed when potassium salts were employed instead of the corresponding sodium salts. A central vanadate(V) unit serves to grip four identical chiral monomeric vanadyl(V) units together, by which a potassium ion sits on top of the four flanking units through carbonyl coordinations and serves to hold the whole cluster by cooperation with the central vanadate(V) unit. In comparison with the corresponding monomeric vanadyl(V) methoxide complex, the cluster complex was utilized to facilitate the asymmetric aerobic oxidations of various racemic alpha-hydroxyesters, -amides, and -thioesters with excellent selectivity factors (k(rel) 40 to >500).