Umpolung Strategy with 2‐Aminothiophenols: Access to 2‐Arylbenzothiazine Derivatives from Alkyl Aryl Ketones
作者:Thanh Binh Nguyen、Pascal Retailleau
DOI:10.1002/adsc.202000964
日期:2020.12.8
Strong Brønsted acids were found to catalyze the oxidative condensation of 2‐aminothiophenols with aryl alkyl ketones in DMSO to provide a wide range of complex 2‐arylbenzothiazines. With acetophenones, dimeric 2‐arylbenzothiazines were formed. On the other hand, the reaction with propiophenones resulted in 2:1 adducts whereas 1:1 adducts were produced with isobutyrophenones, benzoylacetonitrile and