8-(3-amino-piperidin-1-yl)-7-(but-2-ynyl)-xanthines, the preparation thereof and their use as pharmaceutical compositions

摘要

The application relates to new substituted xanthines of general formula wherein R1 and R2 are defined as in claims 1 to 11, the tautomers, the enantiomers, the diastereomers, the mixtures thereof and the salts thereof, which have valuable pharmacological properties, particularly an inhibiting effect on the activity of the enzyme dipeptidylpeptidase-IV (DPP-IV).