The present invention provides an agent for the prophylaxis or treatment of autoimmune diseases (e.g., psoriasis, rheumatoid arthritis, inflammatory bowel disease, Sjogren's syndrome, Behcet's disease, multiple sclerosis, systemic lupus erythematosus etc.) and the like, which has a superior Tyk2 inhibitory action.
The present invention relates to a compound represented by the formula
wherein each symbol is as defined in the specification, or a salt thereof.
The present invention provides an agent for the prophylaxis or treatment of autoimmune diseases (e.g., psoriasis, rheumatoid arthritis, inflammatory bowel disease, Sjogren's syndrome, Behcet's disease, multiple sclerosis, systemic lupus erythematosus etc.) and the like, which has a superior Tyk2 inhibitory action.
The present invention relates to a compound represented by the formula
wherein each symbol is as defined in the specification, or a salt thereof.
The reaction of 2-acylamino-4,5-dihydro-3-furancarbonitriles 1 with sodiumiodide in N,N-dimethyl-formamide gave the corresponding 1-acyl-2-oxo-3-pyrrolidinecarbonitriles 2 in good yields. Successive treatment of 1 with titanium(IV) chloride and potassium carbonate resulted in the formation of N-acyl-1-cyanocyclopropanecarboxamides 4. The same compounds 2 were also obtained by treatment of 4 with sodium