Pyrazine derivatives, their preparation and pharmaceutical compositions containing them

摘要

The invention relates to compounds the formula (I): and pharmaceutically usable salts, tautomers and stereoisomers thereof, wherein R1, R2 and R3 are defined herein. The compounds of formula (I) and their pharmaceutically usable salts, tautomers and stereoisomers are inhibitors of PDK1 and cell proliferation/cell vitality and can be employed for the treatment of tumors.