Nickel‐Catalyzed Sulfonylation of Aryl Bromides Enabled by Potassium Metabisulfite as a Uniquely Effective SO
<sub>2</sub>
Surrogate
作者:J. Caleb Hethcox、Heather C. Johnson、Jungchul Kim、Xiao Wang、Lili Cheng、Yang Cao、Melissa Tan、Daniel A. DiRocco、Yining Ji
DOI:10.1002/anie.202217623
日期:——
A nickel-catalyzed sulfonylation of aryl bromides has been developed utilizing an inexpensive, stench-free, inorganic sulfur salt (K2S2O5) as a uniquely effective SO2 surrogate. While initial mechanistic studies identified SO2 as a catalyst poison, later use of the isolated oxidative addition complex revealed that SO2 insertion occurs via dissolved SO2 slowly released upon thermal decomposition of
利用廉价、无臭味的无机硫盐 (K 2 S 2 O 5 ) 作为独特有效的 SO 2替代物,开发了镍催化的芳基溴磺酰化反应。虽然最初的机理研究将 SO 2确定为催化剂毒物,但后来使用分离的氧化加成配合物表明,SO 2插入是通过溶解的 SO 2在 K 2 S 2 O 5热分解时缓慢释放而发生的。