3-hexanoylsulfanyl-propionic acid | 97916-45-5

• 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: 3-hexanoylsulfanyl-propionic acid
• 英文别名: 3-(Hexanoylsulfanyl)propanoic acid；3-hexanoylsulfanylpropanoic acid
• CAS: 97916-45-5
• 化学式: C₉H₁₆O₃S
• 分子量: 204.29
• InChiKey: DCUFSSICUHXGEA-UHFFFAOYSA-N

物化性质

• 沸点：
  326.7±25.0 °C(Predicted)
• 密度：
  1.117±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.1
• 重原子数：
  13
• 可旋转键数：
  8
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.78
• 拓扑面积：
  79.7
• 氢给体数：
  1
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  己酰氯 、 3-巯基丙酸 在 溶剂黄146 作用下， 以 二氯甲烷 为溶剂， 反应 30.0h， 以67.5%的产率得到3-hexanoylsulfanyl-propionic acid
  参考文献：
  名称：

  从动态组合硫酯文库对胆碱酯酶底物进行催化自筛选。

  摘要：

  DOI：

  10.1002/anie.200454165

文献信息

• Transition state stabilization by micelles: thiolysis of <i>p</i>-nitrophenyl alkanoates in cetyltrimethylammonium bromide micelles
  作者：Oswald S Tee、Ogaritte J Yazbeck

  DOI：10.1139/v00-113

  日期：2000.8.1

  Thiolysis of p-nitrophenyl esters (acetate to decanoate) by the anion of 2-mercaptoethanol (ME) is catalyzed by micelles of cetyltrimethylammonium bromide (CTAB) in aqueous solution. At fixed [ME], the observed rate constants (k_obs) show saturation with respect to added [CTAB], consistent with ester binding in the micelles. Plots of k_obs vs. [ME] are linear in the absence and in the presence of the CTAB, and analysis of the slopes of the plots afford rates constants for thiolate ion attack on the esters in the aqueous phase (k_N) and in the micellar phase (k_cN). The strengths of substrate binding and transition state binding to the micelles are strongly correlated, with a slope of unity, because they have the same dependence on the ester chain. Consequently, the catalytic ratios (k_cN/k_N) are independent of the length of the ester. Similar behaviour is found for thiolysis by the dianions of mercaptoacetic acid, 3-mercaptopropionic acid, and cysteine, and also for ester cleavage by the anions of glycine and 2,2,2-trifluoroethanol, as earlier for cleavage by hydroxide ion. The results are consistent with Kirby's dissection of transition state binding into "passive" and "dynamic" components. The passive component involves hydrophobic binding of the ester chain which is more or less the same as in the substrate binding. The dynamic component is associated with reaction in the Stern layer of the micelle, and its magnitude varies with the nucleophiles because of differences in their ease of exchange between the aqueous medium and the Stern layer.Key words: catalysis, esters, thiolysis, micelles.

  对2-巯基乙醇（ME）的阴离子在十溴化十六烷基三甲基铵（CTAB）的胶团催化下，在水溶液中催化对硝基苯酚酯（乙酸至癸酸）的硫醇解。在固定的[ME]下，观察到的速率常数（k_obs）随着添加的[CTAB]呈饱和状态，与酯在胶团中的结合一致。k_obs vs. [ME]的图表在没有CTAB和有CTAB的情况下是线性的，分析图表的斜率可得到水相中对酯的硫醇离子攻击速率常数（k_N）和胶团相中的速率常数（k_cNcN/k_N）与酯的长度无关。对巯基乙酸、3-巯基丙酸和半胱氨酸的二阴离子进行硫醇解，以及甘氨酸和2,2,2-三氟乙醇的阴离子进行酯裂解，与氢氧根离子裂解相似。结果与柯比对过渡态结合的解剖“被动”和“动态”成分一致。被动成分涉及酯链的疏水结合，与底物结合几乎相同。动态成分与胶团的Stern层中的反应相关，并且其大小随着亲核试剂的不同而变化，因为它们在水介质和Stern层之间的交换难易程度不同。关键词：催化，酯，硫醇解，胶团。