Patent ID: 7034045

Claim:
A compound of the formula: wherein: A represents SO 2 ; R a represents (1–6C)alkyl, (2–6C)alkenyl, —(1–4C)alkyl(3–8C)cycloalkyl, or —(1–4C)alkylaromatic: R b represents H, (1–6C)alkyl, (2–6C)alkenyl, —(1–4C)alkyl(3–8C)cycloalkyl, or —(1–4C)alkylaromatic; or R a and R b together with the carbon atoms to which they are attached form a (3–8C) saturated carbocyclic ring, a (3–8C) saturated carbocyclic ring containing a heteroatom selected from the group consisting of sulfur or oxygen, or a (5–8C) carbocyclic ring containing one double bond; R 1 represents an unsubstituted or substituted aromatic group, an unsubstituted or substituted heteroaromatic group, or an unsubstituted or substituted (5–8C)cycloalkyl group; R 2 represents (1–6C)alkyl, (3–6C)cycloalkyl, (1–6C)fluoroalkyl, (1–6C)chloroalkyl, (2–6C)alkenyl, (1–4C)alkoxy(1–4C)alkyl, phenyl which is unsubstituted or substituted by halogen, (1–4C)alkyl or (1–4C)alkoxy, or when A represents SO 2 , a group of formula R 3 R 4 N in which R 3 and R 4 each independently represents (1–4C)alkyl or, together with the nitrogen atom to which they are attached form an azetidinyl, pyrrolidinyl, piperidinyl, morpholino, piperazinyl, hexahydroazepinyl or octahydroazocinyl group; or a pharmaceutically acceptable salt thereof.