1,2-Dichloroethane → HCID 86681737, compound

Participants

Reaction Steps

(S)-3,5-dichloro-4-(2-(3-(cyclopropylmethoxy)-4-(difluoromethoxy)phenyl)-2-hydroxyethyl)pyridine 1-oxide (281 mg, 0.669 mmol), 2-(6-(N-(2-morpholinoethyl)-methylsulfonamido)-2-oxobenzo[d]oxazol-3(2H)-yl)acetic acid hydrochloride (350 mg, 0.803 mmol), EDC (192 mg, 1.004 mmol) and DMAP (204 mg, 1.673 mmol) were dissolved in dry DCM (8 ml), and the mixture was reacted at room temperature for 5 hours. Additional EDC (128 mg, 0.669 mmol) and DMAP (82 mg, 0.669 mmol) were added, and the reaction was stirred at the same temperature overnight. Thus, the mixture was treated with 1N HCl (30 ml) and extracted with DCM (2×100 ml). The organic phase was washed with brine and dried over Na2SO4; the solvent was removed under reduced pressure and the resulting crude was purified by flash chromatography (DCM/MeOH 98/2 to 90/10) yielding (S)-3,5-dichloro-4-(2-(3-(cyclopropylmethoxy)-4-(difluoromethoxy)phenyl)-2-(2-(6-(N-(2-morpholinoethyl)methylsulfonamido)-2-oxobenzo[d]oxazol-3(2H)-yl)acetoxy)ethyl)pyridine 1-oxide (203 mg, 0.253 mmol, 37.8% yield, MS/ESI+ 801.15 [MH]+, [αD]=−20.63, c=0.505, DCM). 1H NMR (300 MHz, DMSO-d6) δ ppm 8.39 (s, 2H), 7.52 (d, 1H), 7.27 (dd, 1H), 7.22 (d, 1H), 7.20 (d, 1H), 7.11 (d, 1H), 6.97 (dd, 1H), 7.08 (t, 1H), 6.04 (dd, 1H), 4.86 (d, 1H), 4.72 (d, 1H), 3.94 (d, 2H), 3.74 (t, 2H), 3.46-3.57 (m, 4H), 3.38 (dd, 1H), 3.22 (dd, 1H), 3.09 (s, 3H), 2.22-2.44 (m, 6H), 1.16-1.31 (m, 1H), 0.50-0.66 (m, 2H), 0.28-0.46 (m, 2H).

Provenance & Evidence