3-nitropyrazole derivatives

Abstract From the Canadian patent

New 3-nitropyrazole derivatives and their process of preparation are provided of formula (I):- (I), in which R1 is a lower alkyl radical R2 is a hydrogen atom or, a lower alkyl radical R3 is a cyano, carboxyl or lower alkoxycarbonyl radical or the radical -CO-NR4R5 in which R4 is a, hydrogen atom or a hydroxyl carbamoyl, lower-alkylcarbamoyl, di-lower-alkylcarbamoyl thiocarbamoyl, ureido, thioureido, hydroxyphenyl or picolyl radical or a lower alkyl alkenyl or, cyclo-lower-alkyl radical optionally substituted by a cyano hydroxyl, pyrrolidino, piperidino, amino lower alkylamino, lower dialkylamino or lower acylamino radical and R5 is a hydrogen atom or a lower alkyl radical or R4 and R5 …