Dimethylformamide → HCID 53372818, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 5-(8-oxo-5-(4-(piperidin-4-yloxy)phenyl)-6-thioxo-5,7-diazaspiro[3.4]octan-7-yl)-3-(trifluoromethyl)picolinonitrile (50 mg, 0.10 mmol) in anhydrous THF (1 mL) was added 2-bromopropane (20 μL, 0.20 mmol) followed by cesium carbonate (100 mg, 0.30 mmol). The reaction mixture was heated at 70° C. overnight. DMF (1 mL) was added to improve solubility and the reaction was heated at 85° C. for 3 h. The mixture was cooled to room temperature and partitioned between water and EtOAc. The aqueous was extracted further with EtOAc (2×) and the combined organics were washed with water, then brine. The organics were dried over magnesium sulfate, filtered and concentrated. Purification by preparative HPLC provided 5 mg of 5-(5-(4-((1-isopropylpiperidin-4-yl)oxy)phenyl)-8-oxo-6-thioxo-5,7-diazaspiro[3.4]octan-7-yl)-3-(trifluoromethyl)picolinonitrile as an off-white solid. 1H NMR (300 MHz, DMSO-d6) δ 9.04 (d, 1H), 8.30 (d, 1H), 7.13 (d, 2H), 6.99 (d, 2H), 4.37-4.26 (m, 1H), 2.81-2.33 (m, 10H), 2.25-1.74 (m, 5H), 1.00 (d, 6H). LCMS [M+1]+ 544.0.

Provenance & Evidence