Water → HCID 23517371, compound

Participants

Reaction Steps

A solution of 44 (0.400 g, 1.27 mmole), N,O dimethylhydroxylamine hydrochloride (0.247 g, 2.53 mmole), DMAP (0.309 g, 2.53 mmole),and EDCI (0.364 g, 1.90 mmole), in 40 mL dimethylformamide was stirred at rt for 2 hours. The reaction mixture was poured into water and extracted with ethyl acetate. The combined organic phases were washed with saturated sodium bicarbonate, water, brine, and dried with magnesium sulfate. The organic phases were concentrated and the residue was loaded on to silica gel and chromatographed with silica gel (hexanes:ethyl acetate, 7:3) to afford0.290 g (63%) of amide 45 as a tan solid: Mp=100–102° C.; 1H NMR (DMSO-d6) δ 7.74 (dd, 1H, J=2.0 Hz), 7.66 (d, 1 H, J=8.6 Hz), 7.37 (s, 1 H), 7.31 (t, 1 H, J=8.7 Hz), 7.24 (d, 1 H, J=2.6 Hz), 6.93 (d, 1 H, J=2.6 Hz), 3.90 (s, 3 H), 3.82 (s, 3 H), 3.59 (br s, 3 H), 3.30 (s, 3 H); MS 360 (M+H)+

Provenance & Evidence