2-Propanesulfonyl chloride → N-{3-[4-Hydroxy-1-(3-methylbutyl)-2-oxo-1,2-dihydro-1,8-naphthyridin-3-yl]-1,1-dioxido-4H-1,2,4-benzothiadiazin-7-yl}propane-2-sulfonamide

Participants

Reaction Conditions

Reaction Steps

To the product of Example 205 (21.5 g, 0.05 mmol) in pyridine (1 mL) was added isopropylsulfonyl chloride (22 μl, 0.2 mmol). The reaction mixture was heated in a microwave reactor at 120° C. for 120 minutes. The reaction was cooled to 25° C. and concentrated under reduced pressure. The residue was triturated with water (1 mL), filtered, and washed with 1:1 hexane:ethyl acetate. The crude product was chromatographed on silica gel eluting with 199:1 dichloromethane:methanol to give the title compound (2 mg, 7%). 1H NMR (300 MHz, DMSO-d6): δ 0.98 (d, J=6.62 Hz, 6 H) 1.28 (d, J=6.99 Hz, 6 H) 1.57 (m, 2 H) 1.71 (m, 1 H) 3.29 (m, 1 H) 4.49 (m, 2 H) 7.50 (dd, J=7.91, 4.60 Hz, 1 H) 7.59 (dd, J=8.82, 2.57 Hz, 1 H) 7.67 (d, J=2.57 Hz, 1 H) 7.74 (d, J=9.18 Hz, 1 H) 8.56 (dd, J=8.09, 1.84 Hz, 1 H) 8.89 (dd, J=4.60, 1.65 Hz, 1 H) 10.33 (s, 1 H) 14.11 (s, 1 H). MS (ESI−) m/z 532 (M−H)−.

Provenance & Evidence