ChemInform Abstract: An Unexpected Isomerization of N‐Aryl‐3‐amino‐4‐nitroisothiazol‐5(2H)‐ imines to 2‐(Benzothiazol‐2‐yl)‐2‐nitroethene‐1,1‐diamines.

Abstract

An Unexpected Isomerization of N-Aryl-3-amino-4-nitroisothiazol-5(2H)-imines to 2-(Benzothiazol-2-yl)-2-nitroethene-1,1-diamines. -Cyclization of thioacrylamides of type (I) (11 examples) yields the corresponding isothiazoles (II), which isomerize spontaneously in polar solvents to give the benzothiazoles (III). -(MOYA ARGILAGOS, D.; GARCIA TRIMINO, M. I.; MACIAS CABRERA, A.; LINDEN, A.; HEIMGARTNER, H.; Helv.