Sulfonation and sulfation in reactions of <i>C</i>
-methylated phenols and anisoles with sulfur trioxide. 4-Substituted phenyl hydrogen sulfates: Effective reagents for transsulfonation
作者:Hans D. Goossens、Hans J. A. Lambrechts、Hans Cerfontain、Peter de Wit
DOI:10.1002/recl.19881070606
日期:——
The sulfation and sulfonation of the methyl- and dimethylphenols with 0.9 and 4.0 equiv. of SO3 in nitromethane at 0°C have been studied. On using 0.9 equiv. of SO3, the sulfonic acid product distributions are determined by the ortho- and para-directing effect of the activating hydroxy substituent. In the reactions with 4.0 equiv. of SO3, the sulfonic acid product distributions are affected by the
甲基苯酚和二甲基苯酚的当量和当量为0.9和4.0的硫酸化和磺化。已经研究了0°C下硝基甲烷中的SO 3含量。在使用0.9当量时 对于SO 3而言,磺酸产物的分布取决于活化羟基取代基的邻位和对位作用。在与4.0当量的反应中。在SO 3中,磺酸产物的分布受相应的苯基硫酸氢盐的主要初始形成和随后的磺化作用的影响,其中大部分的OSO 3 H取代基被电子钝化,并且(主要)对位-指挥。为了进行比较,还研究了甲基茴香醚,甲磺酸苯基酯和2,3-二氢苯并呋喃的磺化作用。