一种新颖的将4-羟基-1,2-苯并噻嗪1,1-二氧化物(3a-e)轻松转化为4-氧代-1,3-2 H-苯并噻嗪1,1-二氧化物(4a-e)和4-在甲醇中254 nm照射下,将羟基-2-甲基-N-(吡啶-2-基)-2 H -1,2-苯并噻嗪-3-羧酰胺1,1-二氧化物(PRX)转化为N-甲基糖精(2)或报告有乙腈。通过光谱方法和单晶X射线结构测定4a和4d阐明了产物的结构。
Certain substituted-4-hydroxy-(or 4-acyloxy-)2H-1,2-benzothiazine 1,1-dioxides having at the 3-position a 2-substituted-1,3,4-oxadiazol-5-yl, a 2-substituted-tetrazol-5-yl or a 1-substituted-tetrazol-5-yl group useful as selective 5-lipoxygenase pathway inhibitors; and methods for their preparation.