Aromatic Sulfonation, 131. Formation of Sulfonic Acids and Sulfonic Anhydrides in the Sulfur Trioxide Sulfonation of Some Dialkylbenzenes and 1,ω-Diarylalkanes
作者:Hans Cerfontain、Ankie Koeberg-Telder、Helen C. A. van Lindert、Bert H. Bakker
DOI:10.1002/jlac.199719971109
日期:1997.11
An exploratory study has been made on the SO3 sulfonation of a number of alkylarenes in [D2]dichloromethane as an aprotic solvent, mostly in the presence of [D8]1,4-dioxane as a reactivity moderator, in order to obtain information on sulfonic acid and sulfonic anhydride formation. 1,2-Dimethylbenzene (1) with 1.0 mol-equiv. of SO3 yields predominantly the 4-sulfonic acid (1-4-S), whereas with 4.0 mol-equiv
为了获得质子惰性的[D 8 ],4-二恶烷,在[D 2 ]二氯甲烷中作为非质子传递溶剂,对许多烷基芳烃进行SO 3磺化的探索性研究,有关磺酸和磺酸酐形成的信息。具有1.0摩尔当量的1,2-二甲基苯(1)。SO 3的产率主要为4-磺酸(1 -4-S),而当量为4.0 mol-当量。的SO 3,的相应的(分子间)磺酸酐(18%(摩尔)1 -4-SO 2)2 O的额外形成。1,4-二甲苯(2),当量为0.8摩尔当量。SO 3的产率主要为2 -2-S,而当量为4.0 mol-当量。通过SO 3形成磺酸酐(2 -2-SO 2)2 O及其6-S和6,6'-S 2衍生物,最终的主要产物为(6-S- 2 -2-SO 2)2 O. 1-乙基-4-甲基苯(3)与2.0 mol当量的反应。的SO 3- [D 8在-78 -40°C下,]二恶烷导致2-和3-S衍生物以26:74的摩尔比主要形成,并带有少量的三种相应的分子间酸酐。在0