Sodium hydride → HCID 25105909, compound

Participants

Reaction Steps

To a stirring solution of Example 35B (20 mg, 0.074 mmol) in 0.5 mL of anhydrous N,N-dimethylformamide was added NaH (60%, 4.0 mg, 0.096 mmol). The resulting mixture was stirred for 20 min before tert-butyl bromoacetate (11 μL, 0.074 mmol) was added, and stirring continued for 2 h. The reaction mixture was then partitioned between ethyl acetate (10 mL) and brine (10 mL), the organic layer was dried over MgSO4, filtered, evaporated to dryness in vacuuo. The residue was treated with 1.0 mL of 4N HCl in 1,4-dioxane for 3 h. Organic solvent was then removed on a rotavap, and the residue was purified using reverse phase HPLC (C-18 column, eluting with a 5-100% CH3CN gradient in 10 mM ammonium acetate(aq.)) to give the title compound (5 mg, 21% yield). 1H NMR (300 MHz, DMSO-d6) δ 8.45 (s, 1H), 8.15 (brs, 2H), 4.79-4.60 (m, 2H), 4.34 (d, J=7.1 Hz, 1H), 2.54 (s, 3H), 2.25-2.15 (m, 1H); 1.81-1.38 (m, 8H). MS (ESI) m/z 330 (M+H)+.

Provenance & Evidence