Diisopropylethylamine → N-(5-bromo-3-phenoxypyridin-2-yl)-4-(2-(3-methyl-1,2,4-oxadiazol-5-yl)ethyl)thiazol-2-amine

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To a mixture of 3-(2-(5-bromo-3-phenoxypyridin-2-ylamino)thiazol-4-yl)propanoic acid (0.100 g, 0.238 mmol), DIEA (0.0456 mL, 0.262 mmol) in 5 mL DMF at ambient temperature was added N-((dimethylamino)fluoromethylene)-N-methylmethanaminium hexafluorophosphate(V) (0.0628 g, 0.238 mmol). The mixture was stirred for 30 minutes at ambient temperature and then N-hydroxyacetamidine (0.0194 g, 0.262 mmol) was added in one portion and the reaction was heated at 110° C. overnight. The reaction was then cooled to ambient temperature and EtOAc was added and the organic layer washed with water (2×10 mL), dried over Na2SO4 and concentrated to a residue that was purified on silica gel eluting with 25% EtOAc/Hexanes to give 5 the title compound (0.067 g, 61.4% yield). 1H NMR (d6 DMSO) δ 2.29 (s, 3H), 3.04 (t, 7.6 Hz, 2H), 3.26 (t, J=7.6 Hz, 2H), 6.74 (s, 1H), 7.11 (d, J=7.8 Hz, 2H), 7.21 (t, J=7.3 Hz, 1H), 7.40 (d, J=2.0 Hz, 1H), 7.44 (t, J=8.0 Hz, 2H), 8.22 (d, J=2.0 Hz, 1H), 11.00 (s, 1H).

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