A method for the treatment or prophylaxis of acute or chronic damage, disorders or indirect sequelae of organs and tissues caused by ischemic or reperfusion events, for the treatment or prophylaxis of arrhythmias, of life-threatening cardiac ventricular fibrillation, of myocardial infarction, of angina pectoris, for the treatment or prophylaxis of ischemic states of the heart, of ischemic states of the peripheral and central nervous system or of stroke or of ischemic states of peripheral organs and tissues, for the treatment or prophylaxis of states of shock, of diseases in which cellular proliferation represents a primary or secondary cause, of cancer, of metastasis, of prostate hypertrophy and of prostate hyperplasia, of atherosclerosis or of disturbances of lipid metabolism, of high blood pressure, of disorders of the central nervous system, for the treatment or prophylaxis of non-insulin-dependent diabetes mellitus (NIDDM) or late damage from diabetes, of thromboses, of disorders resulting from endothelial dysfunction, of intermittent claudication, for the treatment or prophylaxis of fibrotic disorders of internal organs, fibrotic disorders of blood vessels, for the treatment or prophylaxis of heart failure or of congestive heart failure, of acute or chronic inflammatory disorders, of disorders caused by protozoa, of malaria and of coccidiosis in poultry, for preserving and storing transplants for surgical procedures, for preventing age-related tissue change, for inhibiting aging, for prolonging life, for the treatment and reduction of the cardiotoxic effects in thyrotoxicosis, or for producing a diagnostic aid, said method comprising the use or administration of an effective amount of a compound of formula I:
- in which
- R1 and R2
- are, independently of one another, hydrogen, alkyl having 1, 2, 3 or 4 carbon atoms, alkenyl having 2, 3, 4, 5 or 6 carbon atoms, alkynyl having 2, 3, 4, 5 or 6 carbon atoms, aryl, heteroaryl, F, Cl, Br, I, NO2, NH2, alkylamino having 1, 2, 3 or 4 carbon atoms, NRaRb, alkylcarbonylamino having 1, 2, 3 or 4 carbon atoms, OH, alkoxy having 1, 2, 3 or 4 carbon atoms, S(O)nR7, CO2H, alkoxycarbonyl having 1, 2, 3 or 4 carbon atoms, alkylcarbonyl having 1, 2, 3 or 4 carbon atoms, CONH2, CONRaRb, CN, polyfluoroalkyl having 1, 2, 3 or 4 carbon atoms, polyfluoroalkoxy having 1, 2 or 3 carbon atoms or SO3H;
- R1 and R2 themselves optionally being substituted by a linear or branched alkyl group having 1, 2, 3 or 4 carbon atoms;
- wherein
- n is zero, 1 or 2;
- R3 is hydrogen, aryl, heteroaryl, a group of the Alk-R8 type or cycloalkyl having 3, 4, 5, 6, 7 or 8 carbon atoms,
- in which cycloalkyl is optionally substituted by one or more substituents selected from the group F, Cl, Br or I,
- Alk is alkyl having of 1, 2, 3, 4 or 5 carbon atoms in a linear or branched chain,
- R8 is hydrogen, cycloalkyl having 3, 4, 5, 6, 7 or 8 carbon atoms, polyfluoroalkyl having 1, 2, 3 or 4 carbon atoms, aryl, heteroaryl, OH, alkoxy having 1, 2, 3 or 4 carbon atoms, CO2H, CONH2, CONRaRb, NH2, alkylamino having 1, 2, 3 or 4 carbon atoms or NRaRb;
- R4, R5 and R6
- are, independently of one another, hydrogen or a linear or branched alkyl having 1, 2, 3 or 4 carbon atoms;
- R7 is a linear or branched alkyl having 1, 2, 3 or 4 carbon atoms;
- and
- Ra and Rb are, independently of one another, defined as R7, or alternatively Ra and Rb form, together with the nitrogen atom to which they are attached, a 5- or 6-membered heterocycle optionally containing another hetero atom chosen from O, S or N;
- and a racemic mixture, enantiomer and diastereomer thereof or a mixture thereof, a tautomer thereof or a pharmaceutically acceptable salt thereof.