6-(4-HYDROXY-PHENYL)-3-STYRYL-1H-PYRAZOLO[3,4-B]PYRIDINE-4-CARBOXYLIC ACID AMIDE DERIVATIVES AS KINASE INHIBITORS

摘要

The present invention relates to pyrazolo[3,4-b]pyridine compounds of the formula,
in which R 1 , R 2 , R 3 , R 4 and R 5 are defined as indicated below. The compounds of the formula are kinase C (PKC) inhibitors, and are useful for the treatment of diseases associated with diabetes and diabetic complications, such as, diabetic nephropathy, diabetic neuropathy and diabetic retinopathy, for example. The invention furthermore relates to the use of compounds of the formula, in particular as active ingredients in pharmaceuticals, and pharmaceutical compositions comprising them.