以前已经认为,磺酸酯的水解反应是通过协同机制发生的。现在,我们报告对芳基苯磺酸盐进行碱水解的布朗斯台德相关性破裂的观察结果。在断点的任一侧,测得的β离开基团值为-0.27(p K a <8.5)和-0.97(p K a > 8.5)。这些数据与涉及五价中间体的两步机制相一致,QM / MM计算也支持该机制。新兴的情况可以通过强亲核试剂与离去基团较弱的组合效应来解释,该组合基团迫使通常协调一致的反应有利于逐步进行。
1-Phenylsulfonylbenzotriazole: A Novel and Convenient Reagent for the Preparation of Benzenesulfonamides and Aryl Benzenesulfonates
作者:Alan R. Katritzky、Guifen Zhang、Jing Wu
DOI:10.1080/00397919408013820
日期:1994.1
Readily available 1-phenylsulfonylbenzotriazole smoothly converts various aliphatic and aromatic amines and phenols into the corresponding benzenesulfonamides and benzenesulfonates in good yields.
Georgescu, vol. 8, p. 668
作者:Georgescu
DOI:——
日期:——
Katritzky Alan R., Zhang Guifen, Wu Jing, Synth. Commun, 24 (1994) N 2, S 205-216
作者:Katritzky Alan R., Zhang Guifen, Wu Jing
DOI:——
日期:——
Kinetic and computational evidence for an intermediate in the hydrolysis of sulfonate esters
作者:Ann C. Babtie、Marcelo F. Lima、Anthony J. Kirby、Florian Hollfelder
DOI:10.1039/c2ob25699a
日期:——
occur by concerted mechanisms. We now report the observation of a break in a Brønsted correlation for the alkaline hydrolysis of aryl benzenesulfonates. On either side of a break-point, βleaving group values of −0.27 (pKa < 8.5) and −0.97 (pKa > 8.5) are measured. These data are consistent with a two-step mechanism involving a pentavalent intermediate that is also supported by QM/MM calculations. The
以前已经认为,磺酸酯的水解反应是通过协同机制发生的。现在,我们报告对芳基苯磺酸盐进行碱水解的布朗斯台德相关性破裂的观察结果。在断点的任一侧,测得的β离开基团值为-0.27(p K a <8.5)和-0.97(p K a > 8.5)。这些数据与涉及五价中间体的两步机制相一致,QM / MM计算也支持该机制。新兴的情况可以通过强亲核试剂与离去基团较弱的组合效应来解释,该组合基团迫使通常协调一致的反应有利于逐步进行。
Baliah,V.; Uma,M., Recueil des Travaux Chimiques des Pays-Bas, 1961, vol. 80, p. 139 - 148