(2-Nitrophenyl)acetic acid → 3-isobutyl-5-(2-(2-nitrophenyl)acetyl)-3-phenyl-4,5,6,7-tetrahydrofuro[3,4-c]pyridin-1(3H)-one

Participants

Reaction Steps

To a solution of 2-(2-nitrophenyl)acetic acid (79 mg, 0.435 mmol), 3-isobutyl-3-phenyl-4,5,6,7-tetrahydrofuro[3,4-c]pyridin-1(3H)-one (50 mg, 0.184 mmol), and N,N′-diisopropylethylamine (112 mg, 0.870 mmol) in THF (5 mL) was added BOP reagent (144 mg, 0.326 mmol) and the mixture was stirred at room temperature for 16 hours. The crude reaction mixture was concentrated to dryness and purified by column chromatography (12 g, SiO2, 0 to 100% ethyl acetate in hexanes) to provide 3-isobutyl-5-(2-(2-nitrophenyl)acetyl)-3-phenyl-4,5,6,7-tetrahydrofuro[3,4-c]pyridin-1(3H)-one (57 mg, 60%) as a white solid: 1H NMR (300 MHz, CHLOROFORM-d) δ ppm 0.80-1.01 (m, 6H), 1.54-1.73 (m, 1H), 1.74-1.87 (m, 1H), 2.20-2.36 (m, 1H), 2.37-2.63 (m, 2H), 3.42-3.58 (m, 1H), 3.76-3.92 (m, 1H), 3.93-4.14 (m, 2H), 4.40 (m, 1H), 4.75 (d, J=19.59 Hz, 1H), 7.19-7.42 (m, 6H), 7.42-7.53 (m, 1H), 7.53-7.64 (m, 1H), 8.04-8.16 (m, 1H); MS m/z 435 (M+H)+, 457 (M+23)+, 433 (M−H)−.

Provenance & Evidence