3-((2-(4-Methylthiazol-2-ylamino)pyridin-3-yloxy)methyl)phenol (prepared according to Example 22; 900 mg, 2.87 mmol), potassium carbonate (992 mg, 7.18 mmol), and tert-butyl 2-bromoacetate (0.424 mL, 2.87 mmol) were added to a 100 mL round bottom flask and dissolved in DMF (10 mL). The reaction mixture was stirred for 3 hours, then water (90 mL) was added and the reaction mixture was stirred at room temperature for 1 hour. The resultant solids were filtered and purified over silica gel (20% ethyl acetate in hexanes) to afford tert-butyl 2-(3-((2-(4-methylthiazol-2-ylamino)pyridin-3-yloxy)methyl)phenoxy)acetate (680 mg, 55.4% yield) as a white foam. 1H NMR (CDCl3) δ 8.60 (bs, 1H), 7.94 (dd, 1H), 7.32 (t, 1H), 7.07 (dd, 1H), 7.03 (m, 1H), 6.95 (m, 1H), 6.89 (dd, 1H), 6.80 (dd, 1H), 6.39 (q, 1H), 5.08 (s, 2H), 4.53 (s, 2H), 2.33 (s, 3H), 1.48 (s, 9H). Mass spectrum (apci) m/z=372 (100), 428 (20).
