3-methoxyphenyl thiochloroformate | 10506-28-2

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯酚醚
• 英文名称: 3-methoxyphenyl thiochloroformate
• 英文别名: Thiokohlensaeure-O-3-methoxyphenylester-chlorid；Chlorthionameisensaeure-m-methoxyphenylester；O-(3-methoxyphenyl) chloromethanethioate
• CAS: 10506-28-2
• 化学式: C₈H₇ClO₂S
• 分子量: 202.661
• InChiKey: BRRMOTRNUYLETL-UHFFFAOYSA-N

物化性质

• 沸点：
  90-91 °C(Press: 1 Torr)
• 密度：
  1.317±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.3
• 重原子数：
  12
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.12
• 拓扑面积：
  50.6
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  对硝基苯酚 、 3-methoxyphenyl thiochloroformate 生成 3-methoxyphenyl 4-nitrophenyl thionocarbonate
  参考文献：
  名称：

  Kinetics and Mechanisms of the Reactions of 3-Methoxyphenyl, 3-Chlorophenyl, and 4-Cyanophenyl 4-Nitrophenyl Thionocarbonates with Alicyclic Amines

  摘要：

  The reactions of 3-methoxyphenyl, 3-chlorophenyl, and 4-cyanophenyl 4-nitrophenyl thionocarbonates (1, 2, and 3, respectively) with a series of secondary alicyclic amines are studied kinetically in 44 wt % ethanol-water at 25.0 degreesC and an ionic strength of 0.2 M (KCl). Pseudo-first-order rate coefficients (k(obsd)) are obtained for all reactions (amine excess was used). The reactions of compound 1 with piperidine, piperazine, and 1-(2-hydroxyethyl)piperazine and of compounds 2 and 3 with these amines and morpholine exhibit linear k(obsd) versus amine concentration plots with slopes (k(1)) independent of pH. In contrast, the plots are nonlinear upward for the reactions of substrate I with morpholine, 1-formylpiperazine, and piperazinium ion and of substrates 2 and 3 with the two latter amines. For all these reactions, a reaction scheme is proposed with a zwitterionic tetrahedral intermediate (T +/-), which can be deprotonated by an amine to yield an anionic intermediate (T-). When the nonlinear plots are fit through an equation derived from the scheme, rate and equilibrium microcoefficients are obtained. The Bronsted-type plots for k(1) are linear with slopes of beta (1) = 0.22, 0.20, and 0.24 for the aminolysis of 1, 2, and 3, respectively, indicating that the formation of T+/- (k(1) step) is rate-determining. The k(1) values for these reactions follow the sequence 3 > 2 > 1, which can be explained by the sequence of the electron-withdrawing effects from the substituents on the nonleaving group of the substrates.

  DOI：

  10.1021/jo0157371

文献信息

• Kinetics and Mechanisms of the Reactions of 3-Methoxyphenyl, 3-Chlorophenyl, and 4-Cyanophenyl 4-Nitrophenyl Thionocarbonates with Alicyclic Amines
  作者：Enrique A. Castro、Leonardo Leandro、Nicolas Quesieh、José G. Santos

  DOI：10.1021/jo0157371

  日期：2001.9.1

  The reactions of 3-methoxyphenyl, 3-chlorophenyl, and 4-cyanophenyl 4-nitrophenyl thionocarbonates (1, 2, and 3, respectively) with a series of secondary alicyclic amines are studied kinetically in 44 wt % ethanol-water at 25.0 degreesC and an ionic strength of 0.2 M (KCl). Pseudo-first-order rate coefficients (k(obsd)) are obtained for all reactions (amine excess was used). The reactions of compound 1 with piperidine, piperazine, and 1-(2-hydroxyethyl)piperazine and of compounds 2 and 3 with these amines and morpholine exhibit linear k(obsd) versus amine concentration plots with slopes (k(1)) independent of pH. In contrast, the plots are nonlinear upward for the reactions of substrate I with morpholine, 1-formylpiperazine, and piperazinium ion and of substrates 2 and 3 with the two latter amines. For all these reactions, a reaction scheme is proposed with a zwitterionic tetrahedral intermediate (T +/-), which can be deprotonated by an amine to yield an anionic intermediate (T-). When the nonlinear plots are fit through an equation derived from the scheme, rate and equilibrium microcoefficients are obtained. The Bronsted-type plots for k(1) are linear with slopes of beta (1) = 0.22, 0.20, and 0.24 for the aminolysis of 1, 2, and 3, respectively, indicating that the formation of T+/- (k(1) step) is rate-determining. The k(1) values for these reactions follow the sequence 3 > 2 > 1, which can be explained by the sequence of the electron-withdrawing effects from the substituents on the nonleaving group of the substrates.