Thiazolo [3,2‐b]‐s‐triazole

Abstract

2‐Formamidothiazole and O‐mesitylenesulfonylhydroxylamine readily gave 3‐umino‐2‐form‐amidothiazolium mesitylenesulfonate that with polyphosphoric acid gave thiazolo [3,2‐b]‐s‐triazole. triazole. In its nmr spectrum, a long‐range coupling of 1.4 Hz between H‐2 and H‐6 is observed.