Cesium carbonate → Tert-butyl 4-{1-hydroxy-1-[5-(3-{[4-(trifluoromethyl)-pyrimidin-2-yl]amino}phenyl)-1,3-thiazol-2-yl]ethyl}piperidine-1-carboxylate

Participants

Reaction Steps

2-Chloro-4-(trifluoromethyl)pyrimidine (0.030 mL, 0.245 mmol), the product of Step 3 (82.4 mg, 0.204 mmol), Cs2CO3 (133 mg, 0.408 mmol), palladium(II) acetate (2.292 mg, 10.21 mol) and Xantphos (17.72 mg, 0.031 mmol) were stirred in Dioxane (4.0 mL) at 105° C. overnight under N2. The reaction mixture was filtered through a celite pre-pack column with CH2Cl2 and small amount of 2-MeTHF. The filtrate was concentrated and the residue was purified by flash chromatography to give tert-butyl 4-{1-hydroxy-1-[5-(3-{[4-(trifluoromethyl)-pyrimidin-2-yl]amino}phenyl)-1,3-thiazol-2-yl]ethyl}piperidine-1-carboxylate (Example 15(1), 74 mg, 0.135 mmol, 66%). APCI: [M-Boc+H]+ m/z 450.1. 1H NMR (CDCl3): δ 8.67 (d, J=4.91, 1H), 8.07 (s, 1H), 7.90 (s, 1H), 7.66 (s, 1H), 7.52 (d, J=8.22, 1H), 7.39 (t, J=7.91, 1H), 7.30-7.25 (m, 1H), 7.08 (d, J=4.91, 1H), 4.19-4.09 (m, 2H), 3.31 (s, 1H), 2.75-2.57 (m, 2H), 1.95 (td, J=12.01, 3.49, 1H), 1.87-1.73 (m, 1H), 1.67 (s, 3H), 1.60-1.49 (m, 1H), 1.45 (s, 9H), 1.50-1.32 (m, 1H). rhSYK activity=++

Provenance & Evidence