revealed that SO2F2-mediated acid activation proceeds via the anhydride, which is then converted to the corresponding acyl fluoride. Tetrabutylammonium chloride or bromide accelerate the formation of acyl fluoride. Optimized halide-accelerated conditions were used to synthesize acyl fluorides in 30–80% yields, and esters, amides, and thioesters in 72–96% yields without reoptimization for each nucleophile.
在这里,我们报道了一种新的一锅法,用于从
羧酸开始的SO 2 F 2介导的亲核酰基取代反应。机理研究表明,SO 2 F 2介导的酸活化是通过酸酐进行的,然后将其转化为相应的酰基
氟。
四丁基氯化铵或
溴化物可加速酰基
氟的形成。优化的卤化物加速条件可用于以30-80%的产率合成酰
氟,而
酯,
酰胺和
硫代
酯的产率为72-96%,而无需对每个亲核试剂进行重新优化。