Water → HCID 66933278, compound

Participants

Reaction Steps

7-chloro-2-((S)-1-cyclopropylethyl)-5-ethynylisoindolin-1-one (28.66 g, 110.35 mmol) and potassium hydrogen carbonate (110.0 g, 1103.45 mmol) were dissolved in a solution consisting of 1200 mL of ethyl acetate and 400 mL of water. To this solution was added ethyl 2-chloro-2-(hydroxyimino)acetate (66.9 g, 441.38 mmol). The ethyl 2-chloro-2-(hydroxyimino)acetate was added at room temperature as a solution in 160 mL of ethyl acetate via syringe pump at a rate of 5 mL/Hr. Following the addition of the ethyl 2-chloro-2 (hydroxyimino)acetate, the reaction was allowed to continue stirring at room temperature for an additional 12 hours. The ethyl acetate layer was extracted in a separatory funnel, dried over magnesium sulfate, filtered and concentrated under reduced pressure. The material was purified by flash chromatography on silica gel eluting with a gradient of 0 to 25% ethyl acetate in hexane to afford the title compound as a white solid (17.05 g, 41.2%). 1H NMR (300 MHz, CDCl3) δ ppm 0.36-0.53 (m, 3H) 0.63-0.73 (m, 1H) 0.98-1.12 (m, 1H) 1.38 (d, 3H) 1.47 (t, 3H) 3.80 (dq, 1H) 4.43-4.65 (m, 4H) 7.05 (s, 1H) 7.83 (s, 2H). MS ESI, m/z=375 (M+H). HPLC Method B: 0.82 min

Provenance & Evidence