An original and regioselective method for the meta functionalisation of fluoro- and ethylbenzene is reported. This process involves a 2,5- disilylation of these substrates using trimethylchlorosilane in the presence of lithium in THF as the solvent. After aromatisation, monodesilylation in position 2- and electrophilic substitution of the trimethylsilyl group in position 5-, meta acetyl-, senecioyl-
报道了一种用于
氟和乙苯的间位官能化的原始的和区域选择性的方法。该方法涉及在
锂存在于THF中作为溶剂的情况下,使用三
甲基氯硅烷对这些底物进行2,5-二甲
硅烷基化。芳构化后,在2位进行单去甲
硅烷基化,在5位上亲电取代三甲基甲
硅烷基,间乙酰基,千里香酰基,苯甲酰基和
碘代
氟苯和乙苯,以及间
氟或间乙
苯磺酸的钠盐和以良好的产率获得了3-
氨基磺酰基
氟苯。