Hydrochloric Acid → HCID 86681644, compound

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A solution of (S)-4-(2-(2-(3-(N-(tert-butoxycarbonyl)methylsulfonamido)-1H-indol-1-yl)acetoxy)-2-(3-(cyclopropylmethoxy)-4-(difluoromethoxy)phenyl)ethyl)-3,5-dichloropyridine 1-oxide (297 mg, 0.385 mmol) and 4N HCl in dioxane (2 ml, 8.00 mmol) in DCM (4 ml) was stirred at room temperature for 18 hours. The volatiles were removed under vacuum and the crude was purified by flash chromatography on silica gel (DCM:EtOAc=6:4) to give (S)-3,5-dichloro-4-(2-(3-(cyclopropylmethoxy)-4-(difluoromethoxy)phenyl)-2-(2-(3-(methylsulfonamido)-1H-indol-1-yl)acetoxy)ethyl)pyridine 1-oxide (210 mg, 0.313 mmol, 81% yield). MS/ESI+ 670.36 [MH]+; [αD]=+7.7, c=0.6, MeOH; 1H NMR (300 MHz, DMSO-d6) δ ppm 9.18 (br. s., 1H), 8.51 (s, 2H), 7.67 (d, 1H), 7.29 (s, 1H), 7.04-7.20 (m, 4H), 7.02 (d, 1H), 6.91 (dd, 1H), 7.06 (t, 1H), 6.01 (dd, 1H), 5.23 (d, 1H), 5.06 (d, 1H), 3.85 (d, 2H), 3.42 (dd, 1H), 3.20 (dd, 1H), 2.86 (s, 3H), 1.08-1.31 (m, 1H), 0.54-0.68 (m, 2H), 0.30-0.48 (m, 2H))

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