3,5-二甲基-4-羟基苯磺酸的芳基酯在中度至强碱性水溶液中的水解遵循磺化醌(二氧化硫醌)中间体的分解途径。log k app和p K LG之间的布朗斯台德类型相关性以及反应中涉及的有效电荷变化的检查进一步支持了ElcB机制。从该研究和先前的研究看来,羟基芳烃磺酸的芳基酯似乎比相应的羟基芳烃羧酸酯更倾向于通过解离途径水解。
Structure−Reactivity Correlations in the Dissociative Hydrolysis of 2‘,4‘-Dinitrophenyl 4-Hydroxy-X-benzenesulfonates
作者:Giorgio Cevasco、Sergio Thea
DOI:10.1021/jo961024k
日期:1996.1.1
The hydrolysis reactions of several title esters in water at 60 degrees C follow the rate law k(obs) = (k(a) + k(b)[OH(-)])/(1 + a(H)/K(a)), where K(a) is the ionization constant of the hydroxy group of the ester and k(b) is the second-order rate constant for the S(N)2(S) attack of hydroxide ion on the ionized ester. Hammett and Brønsted correlations are consistent with a previous proposal that the
On the intermediacy of phenyl hydrogen sulfates in the sulfonation of phenols. Sulfonation of phenol, anisole, methyl phenyl sulfate, the 2-halogenophenols, a series of phenyl methanesulfonates together with 2,6-dimethylaniline and its N-methylsulfonyl de
作者:Peter de Wit、Alex F. Woldhuis、Hans Cerfontain
DOI:10.1002/recl.19881071204
日期:——
The sulfonation of methylphenylsulfate (4) with concentrated aqueous sulfuric acid at 25°C yields the 4-sulfonic acid. This initial product then decomposes to give phenol-4-sulfonic acid, which is subsequently sulfonated to phenol-2,4-disulfonic acid. From the first-order-rate coefficients obtained for sulfonation of phenylmethanesulfonate (3) and (4) in 93.2% H2SO4, for which acid concentration
在25℃下用浓硫酸水溶液磺化甲基苯基硫酸酯(4),得到4-磺酸。然后该初始产物分解得到苯酚-4-磺酸,随后将其磺化为苯酚-2,4-二磺酸。从在93.2%H 2 SO 4中将甲磺酸苯基酯(3)和(4)磺化所获得的一级系数,对于磺酸浓度为H 2 S 2 O 7的酸浓度,其σp +值OSO 2 Me和OSO 2已确定OMe取代基分别为0.40和0.46。2-氯苯基(10)和2-甲基苯基甲磺酸盐(14)在2.0 °C下在硝基甲烷中用2.0当量的SO 3磺化产生4-磺酸作为排他的产物,而2-甲氧基苯基甲烷磺酸盐(13),在相同条件下,仅形成5-磺酸。
Lambrechts, Hans J. A.; Schaasberg-Nienhuis, Zwaan R. H.; Cerfontain, Hans, Journal of the Chemical Society. Perkin transactions II, 1985, p. 669 - 676
作者:Lambrechts, Hans J. A.、Schaasberg-Nienhuis, Zwaan R. H.、Cerfontain, Hans
DOI:——
日期:——
Sterically Hindered Phenolic Buffers. Application to Determination of Rates of Amidation of Ethyl Chloroformate<sup>1</sup>
作者:H. K. Hall
DOI:10.1021/ja01577a029
日期:1957.10
Aromatic sulfonation. 90. Sulfonation of three symmetrical 2,6-dialkylphenols, 2,6-dimethylanisole. Sulfation and sulfonation product distributions and mechanisms
作者:Hans Cerfontain、Ankie Koeberg-Telder、Hans J. A. Lambrechts、Peter De Wit