The compounds of the following formula:
wherein Ar, R and R
1
have the meanings given in the specification. This series of sulfonamido derivatives with a conserved uronamide group at the 5′ position provide superior A3 receptor affinity as well as selectivity. These new adenosine agonists are sulfonamido derivatives N-substituted with aliphatic groups (cyclic or linear) or aromatic radicals.
The present invention provides compounds of the formula
wherein Ar, R and R
1
have a meaning as defined herein in the specification. Compounds of formula (I) are agonists of the A
3
adenosine receptor and, thus, may be employed for the treatment of conditions mediated by the A
3
adenosine receptor. Accordingly, the compounds of formula (I) may be employed for treatment of behavioral depression, cerebral ischemia, hypotension, chemically induced seizures, inflammatory diseases, asthma, and cancer diseases expressing the adenosine A
3
receptor.