Diisopropylethylamine → 1-(4-(4-propionylpiperazin-1-yl)-3-(trifluoromethyl)phenyl)-9-(quinolin-3-yl)-1H-[1,3]oxazino[5,4-c]quinoline-2,4-dione

Participants

Reaction Steps

The crude compound 5.5 4′-(4-(4-propionylpiperazin-1-yl)-3(trifluoromethyl)phenylamino)-3,6′-biquinoline-3′-carboxylic acid (20 mg, 0.033 mmol, 1 equiv.) in CH2Cl2 (3 mL) at 0° C. was added triphosgene (10 mg, 0.033 mmol, 1 equiv.) and DIEA (17 μL, 0.1 mmol, 3 equiv.). The resulting solution was warmed to room temperature in 3 hours and further stirred for 1 hour before being quenched with NaHCO3 (sat. 1 mL) and extracted with CH2Cl2 (5 mL×2). The organic phase was dried over Na2SO4 and the residue was purified via preparative LC-MS (CH3CN:H2O) to afford the desired product 5.6 1-(4-(4-propionylpiperazin-1-yl)-3-(trifluoromethyl)phenyl)-9-(quinolin-3-yl)-1H-[1,3]oxazino[5,4-c]quinoline-2,4-dione (1.3 mg). LC-MS(M+H): 626.20

Provenance & Evidence