Regiospecific synthesis of 2-methyl-4-arylcarbonyl-2<i>H</i>-1, 2-benzothiazin-3(4<i>H</i>)-one 1, 1-dioxides
作者:A. Marfat、R. J. Chambers
DOI:10.1002/jhet.5570260361
日期:1989.5
Acylation of 2-methyl-2H-1, 2-benzothiazin-3(4H)-one1, 1-dioxide 3 with aryl anhydrides in the presence of dimethylaminopyridine occurs regiospecifically to afford 2-methyl-4-arylcarbonyl-2H1, 2-benzothiazin-3(4H)-one1, 1-dioxides 2a-f.
在二甲基氨基吡啶的存在下,使用芳基酸酐将2-甲基-2 H -1、2-苯并噻嗪-3(4 H)-1、1-二氧化物3酰化,从而区域选择性地生成2-甲基-4-芳基羰基-2 H 1,2,2-苯并噻嗪-3(4 H)-one 1,1-dioxides 2a-f。