N,N-Dimethylglycine → 5-(4-chlorobenzyl)-3-(3-hydroxypropyl)-1-methyl-6-(3-(trifluoromethoxy)phenoxy)pyrido[2,3-d]pyrimidine-2,4(1H,3H)-dione

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To a mixture of 3-(6-bromo-5-(4-chlorobenzyl)-1-methyl-2,4-dioxo-1,2-dihydropyrido[2,3-d]pyrimidin-3(4H)-yl)propyl formate (40 mg, 0.086 mmol), N,N-dimethylglycine (4.4 mg, 0.043 mmol), CuI (2.0 mg, 0.011 mmol), and Cs2CO3 (56 mg, 0.172 mmol) in dioxane (1 mL) was added 3-(trifluoromethoxy)phenol (23 mg, 0.130 mmol). The reaction was heated at 120° C. (MW) for 2 h, cooled to RT then diluted with EA (15 mL) and water (10 mL). The organic layer was washed with water (10 mL) and brine (10 mL), dried over Na2SO4 and concentrated to a residue which was purified by Prep HPLC to give 5-(4-chlorobenzyl)-3-(3-hydroxypropyl)-1-methyl-6-(3-(trifluoromethoxy)phenoxy)pyrido[2,3-d]pyrimidine-2,4(1H,3H)-dione (7 mg, 15% yield) as a white solid. 1H NMR (CDCl3) δ: 8.36 (s, 1H), 7.32 (t, J=8.3 Hz, 1H), 7.16 (s, 4H), 6.98 (d, J=8.3 Hz, 1H), 6.75 (dd, J=13.0, 4.7 Hz, 2H), 4.71 (s, 2H), 4.24 (t, J=6.1 Hz, 2H), 3.72 (s, 3H), 3.55 (t, J=5.5 Hz, 2H), 1.98-1.87 (m, 2H). LCMS: MH+ 536 and TR=3.320 min.

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