The First Unequivocal Evidence of the Reacting Electrophile in Aromatic Acylation Reactions<sup>1</sup>
作者:Franz Effenberger、Joachim K. Eberhard、Andreas H. Maier
DOI:10.1021/ja9624331
日期:1996.1.1
The acylation of aromatic compounds with aroyl triflates can be performed in organic solvents (1,2-dichloroethane) without Friedel−Crafts catalysts. These reaction conditions allow kinetic investigations of the reaction in homogeneous solution. From rate measurements evidence is given that in all cases the aroyl triflates 1, 6, and 11 dissociate primarily into the corresponding acylium ions which subsequently
芳香族化合物与芳酰基三氟甲磺酸酯的酰化反应可以在有机溶剂(1,2-二氯乙烷)中进行,无需使用 Friedel-Crafts 催化剂。这些反应条件允许对均匀溶液中的反应进行动力学研究。速率测量表明,在所有情况下,芳酰基三氟甲磺酸酯 1、6 和 11 主要解离为相应的酰基离子,随后与芳香族化合物反应。决速步骤,无论是芳酰基三氟甲磺酸酯的解离还是酰基离子与芳烃的反应,都可以从实验数据中明确指定。从在过量碱存在下的动力学测量给出了酰基离子作为反应亲电试剂在所有研究情况下的明确证据。