Compounds
The invention relates to a compound of formula (I) wherein the variables have the meaning as indicated in the claims; in free form and in salt form; and optionally the enantiomers and geometrical isomers thereof. The compounds of formula (I) are useful as therapeutic agent for organ transplants, lupus, multiple sclerosis, rheumatoid arthritis, psoriasis, Type I diabetes and complications from diabetes, cancer, asthma, atopic dermatitis, autoimmune thyroid disorders, ulcerative colitis, inflammatory bowel diseases, Crohn's disease, Alzheimer's disease, leukemia, osteoarthritis, control of pruritus, chronic respiratory disease or keratoconjunctivitis in mammals.
1. A compound of formula
wherein R is C 1 -C 4 -alkyl or C 3 -C 5 -cycloalkyl; and A is
a radical of formula
wherein Y is NH, N(C 1 -C 2 -alkyl) or O, R 2 is cyano (CN), nitro (NO 2 ), C(O)NR′R″, C(O)OR′ or NR′R″, and R′ and R″ are each independently of the other H or C 1 -C 4 -alkyl,
or a veterinary acceptable salt thereof.
2. The compound of claim 1 or a veterinary acceptable salt thereof, wherein R 2 is cyano or nitro and Y is NH, N(CH 3 ) or O.
3. A pharmaceutical composition comprising a compound according to claim 1 or a veterinary acceptable salt thereof, and a pharmaceutical acceptable carrier.
4. A method of treating atopic dermatitis, eczema, psoriasis, scleroderma, pruritus and other pruritic conditions, or allergic dermatitis, the method comprising administering to a mammal in need thereof an effective amount of a compound according to claim 1 or a veterinary acceptable salt thereof.
5. The method according to claim 4 , wherein the mammal is a dog.