4-Pyridinio-5-pyrazolone salts, process for their preparation and their use

Claim 1

A 4-pyridinio-5-pyrazolone salt represented by the following formula (IVa) ##SPC15## the formula (IVb) ##SPC16## the formula (VI) ##SPC17## or a mixture thereof, wherein R 1 represents a hydrogen atom; sulfamoyl; alkyl having 1 to 40 carbon atoms, alkoxycarbonyl having 1 to 40 carbon atoms, carboxy having 1 to 40 carbon atoms, aryl having 1 to 40 carbon atoms, aryl comprising phenyl substituted with alkyl having 1 to 30 carbon atoms, alkoxy having 1 to 30 carbon atoms, aryloxy comprising phenoxy or naphthoxy, or phenoxy or naphthoxy having a substituent group having 1 to 10 carbon atoms, acylamino having 1 to 30 carbon atoms, carbamoyl having 1 to 30 carbon atoms, alkylsulfonamido having 1 to 30 carbon atims, arylsulfonamido comprising phenylsulfonamido or naphthylsulfonamido, and arylsulfonamido comprising phenylsulfonamido or naphthylsulfonamido having a substituent group having 1 to 20 carbon atoms; R 2 represents a hydrogen atom, hydroxy, amino, sulfo, alkyl having 1 to 45 carbon atoms, aryl comprising phenyl or naphthyl, or phenyl or naphthyl having a substituent group having 1 to 30 carbon atoms, alkoxy having 1 to 45 carbon atoms, aryloxy having 1 to 45 carbon atoms, alkoxycarbonyl having 1 to 40 carbons atoms, alkylamino having 1 to 45 atoms, cycloalkylamino having 3 to 8 carbon atoms and comprising cyclopentylamino, cyclohexylamino, and cycloheptylamino, cycloakylamino having 3 to 8 carbon atoms having a substituent group having 1 to 30 carbon atoms, dialkylamino wherein the alkyl 1 to 20 carbon atoms, diarylamino comprising diphenylamino or dinaphthylamino, or diphenylamino or dinaphthylamino having a substituent group having 1 to 15 carbon atoms, arylamino wherein the aryl has 6 to 45 carbon atoms, acylamino wherein the acyl has 1 to 45 carbon atoms, N-alkylacylamino wherein the acyl has 1 to 30 carbon atoms and the alkyl has 1 to 10 carbon atoms, carbamoyl having 1 to 45 carbon atoms, N-arylacylamino comprising phenyl-acylamino or naphthylacylamino, or phenylacylamino having a substituent group containing phenyl having 1 to 10 carbon atoms and wherein the acyl has 1 to 20 carbon atoms, ureido comprising ureido, N-alkylureido, N-phenylureido, N-naphthyl ureido having 1 to 45 carbon atoms and N-substituted phenyl ureido, N-substituted naphthyl ureido having 1 to 20 carbon atoms in the substituent group and and N-cycloalkyl ureido having 5 to 30 carbon atoms, diacyl amino wherein the acyl has 1 to 20 carbon atoms, and carboxy; R 3 , R 4 and R 5 each represents a hydrogen atom, hydroxy, a halogen atom, amino, sulfonamido, sulfo, alkyl having 1 to 20 carbon atoms, alkoxy having 1 to 20 carbon atoms, alkoxycarbonyl having 1 to 20 carbon atoms, aralkyl having 1 to 20 carbon atoms, aryloxy comprising phenoxy or naphthoxy, or phenoxy having a substituent group having 1 to 14 carbon atoms or napthoxy having a substituent group having 1 to 10 carbon atoms, carboxy, carbamoyl having 1 to 20 carbon atoms, carbamido having 1 to 20 carbon atoms, acylamino wherein the acyl has 1 to 20 carbon atoms, alkylsulfonamido having 1 to 20 carbon atoms, arylsulfonamido comprising phenylsulfonamido or naphthylsulfonamido, or phenylsulfonamido having a substituent group having 2 to 14 carbon atoms or naphthylsulfonamido having a substituent group having 1 to 10 carbon atoms, alkylamino having 1 to 20 caron atoms, arylamino comprising phenylamino or naphthylamino, or phenylamino having a substituent group having 1 to 14 carbon atoms or naphthylamino having a substituent group having 1 to 10 carbon atoms, or R 3 and R 4 can combine to form cyclopentane, cyclohexane, cycloheptane, benzene, benzene substituted with a halogen atom, amino, hydroxy, sulfo, carboxy, sulfonamido or alkyl, alkoxy, acylamino, alkylamino or arylamino as defined for R 2 , pyridine ring, dihydrofuran ring, dihydrothiophene ring or a thiophene ring; and Y represents chlorine, bromine, iodine, perchlorate, periodate or p-toluene sulfonate.