Preparation of imidazolyl-pyrimidine derivatives as GSK3 inhibitors.

CAPLUS AN 2008:9934(Patent)
Title compds. I [R1 = sulfamoyl, carbamoyl or -R5-R6 and N linked (un)substituted 4- to 7-membered satd. ring which optionally contains an addnl. N, O or S; R5 = O, C(O), C(O)O, C(O)NH, etc., R6 = (un)substituted alkyl, carbocyclyl or heterocyclyl; at least one of X1, X2, X3 and X4 = N, the other three independently = N or C(R9), wherein R9 = H, halo, CN, OH, NH2, alkyl or alkoxy; provided that not more than two of X1, X2, X3 or X4 = N; R2 = halo or CN; R3 = Me, (un)substituted 3-tetrahydropyranyl or 4-tetrahydropyranyl; R4 = H, halo, CN or (un)substituted alkyl], and their pharmaceutically acceptable salts, are prepd. and disclosed as glycogen synthase kinase 3 (GSK3) inhibitors. Thus, e.g., II was prepd. by amidation of 3,5-dichloro-2-pyridinecarboxylic acid with piperidine followed by coupling reaction with 5-fluoro-4-[2-methyl-1-(tetrahydro-2H-pyran-4-yl)-1H-imidazol-5-yl]pyrimidin-2-amine, which was prepd. starting from 5-methyl-4-aminoisoxazole and tetrahydro-2H-pyran-4-one in 5 steps. All the exemplar compds. were evaluated for their GSK3 inhibitory activity in GSK3 inhibition assays with typical Ki values ranging from 0.001 to 10,000 nM. For instance, II exhibited a Ki value of 7 nM. As inhibitors of GSK3, I should prove useful in treatment and prevention of GSK3 assocd. diseases including Alzheimer's disease. [on SciFinder(R)]

By the author/editor: Burrows, Jeremy; Huerta, Fernando; Lake, Fredrik; Pedersen, Torben; Rein, Tobias; Rotticci, Didier; show more...; Staaf, Karin; Yngve, Ulrika.; show less...

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MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Basic Medicine; and Medicinal Chemis ...

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