Compounds of formula I ** Formula ** in which R1 indicates Ar, COHet or Het, R2 indicates H, Ar1, NHHet or Het, R3 indicates H or A ', R4 indicates H, A, Ar1, Het, Hal, NHAr1 or CN, Ar indicates phenyl or naphthyl that is unsubstituted or mono or disubstituted with Hal, A, Cyc, [C (R3) 2] pOA, [C (R3) 2] pOH, CN, NHCOHet1, NHCOA, NHCO [ C (R3) 2] pCyc, CONH [C (R3) 2] pCyc, [C (R3) 2] pN (R3) 2, [C (R3) 2] pHet1, NR3SO2A, SO2N (R3) 2, S ( O) mA, COHet1, O [C (R3) 2] mN (R3) 2 and / or O [C (R3) 2] pHet1, Ar1 indicates phenyl that is not substituted or is mono or disubstituted with Hal, A, phenyl , CONH2, [C (R3) 2] pOR3, [C (R3) 2] pN (R3) 2, [C (R3) 2] pCN, [C (R3) 2] pHet1 and / or O [C (R3 ) 2] pHet1, Het indicates furyl, thienyl, pyrrolyl, imidazolyl, pyrazolyl, oxazolyl, isoxazolyl, oxadiazolyl, thiazolyl, triazolyl, tetrazolyl, pyridyl, pyrimidyl, pyridazinyl, pyrazinyl, indolyl, isoindolyl, benzimidazolyl, indazolol, quindazolol - benzodioxolyl, benzothiophenyl, benzofuranyl, imidazopyridyl, dihydroindolyl, 2,3-dihydro-benzo [1,4] dioxinyl or furo [ 3,2- b] pyridyl which is unsubstituted or mono or di or trisubstituted with Hal, A, [C (R3) 2] pOR3, [C (R3) 2] pN (R3) 2, [C (R3) 2) pHet1, NO2, CN, [C (R6) 2] pCOOR3, CON (R3) 2, NR3COA, NR3SO2A, SO2N (R3) 2, S (O) mA, COHet1, O [C (R3) 2] mN (R3) 2, O [C (R3) 2] pHet1 and / or>； = O, Het1 indicates dihydropyrrolyl, pyrrolidinyl, azetidinyl, oxetanyl, tetrahydroimidazolyl, dihydropyrazolyl, tetrahydropyrazylyl, tetrahydrofuranyl, dihydropyridyl, tetrahydropyridinyl, piperipropyloxyl, piperipropyloxy, morphyridinyl, piperipropyloxy, morphyridinyl, piperipropyloxy, , hexahydropyrimidinyl, [1,3] dioxolanyl, tetrahydropyranyl, pyridyl or piperazinyl, which is unsubstituted or mono or disubstituted with Hal, CN, OH, OA, COOA, CONH2, S (O) mA, S (O) mAr, COA, A and / or>； = O, A indicates unbranched or branched alkyl with 1-10 C atoms, in which one or two non-adjacent CH and / or CH2 groups can be replaced by atom
