(Diethylamino)sulfur trifluoride → HCID 86689497, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of N-(2-hydroxyethyl)-4-(8-methoxy-4-oxo-4,5-dihydrothieno[2,3-c]quinolin-9-yl)benzenesulfonamide (120 mg, 0.28 mmol) in methylene chloride (10 mL) and THF (6 mL) under nitrogen at −78° C. was added DAST (89 mg, 0.56 mmol) and the reaction mixture was stirred at −78° C. for 2 h and warmed to room temperature and stirred for 16 h. The reaction mixture was concentrated and the residue was purified by column chromatography (silica gel, ethyl acetate/hexanes gradient). The resulting crude residue was triturated in methylene chloride and filtered to afford the desired product (90 mg, 75%) as a off-white solid: 1H NMR (500 MHz, DMSO-d6) δ 11.92 (s, 1H), 8.10 (t, J=5.9 Hz, 1H), 7.95 (d, J=8.4 Hz, 2H), 7.76 (d, J=5.4 Hz, 1H), 7.56 (d, J=9.1 Hz, 1H), 7.51 (d, J=8.4 Hz, 2H), 7.43 (d, J=9.2 Hz, 1H), 5.75 (d, J=5.4 Hz, 1H), 4.51 (t, J=4.9 Hz, 1H), 4.42 (t, J=4.9 Hz, 1H), 3.71 (s, 3H), 3.24 (q, J=5.2 Hz, 1H), 3.19 (q, J=5.2 Hz, 1H); ESI MS m/z 433 [C20H17FN2O4S2+H]+; HPLC 93.4% (AUC), tR=15.64 min.

Provenance & Evidence