Sodium Hydroxide → HCID 9864033, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 4-[n-butyl-(1,1,3,3-tetramethyl-1,3-dihydro-isobenzofuran-5-yl)-amino]-benzoic acid ethyl ester (Compound 82, 0.224 g, 0.6 mmol) in 20 mL of ethanol was treated with 2 mL of 5M sodium hydroxide solution and the resulting solution was heated at 55° C. for 2 hours. The volatiles were removed by distillation in vacuo and the residue was acidified using hydrochloric acid and extracted with ethyl acetate. The organic extract was washed with brine, dried over anhydrous sodium sulfate and evaporated to a residue which was subjected to flash column chromatography on silica gel using ethyl acetate as the eluent to afford the title compound (0.091 g, 50%) as a white solid. 1H NMR (300 MHz, CDCl3): δ 7.90 (d, 2H, J=9.1 Hz), 7.12 (d, 1H, J=8.2 Hz), 7.09 (d, 1H, J=8.1 Hz), 6.91 (s, 1H), 6.67 (d, 2H, J=9.0 Hz), 3.71 (t, 2H, J=7.8 Hz), 1.72-1.64 (m, 2H) 1.56 (s, 6H), 1.52 (s, 6H), 1.34-1.45 (m, 2H), 0.95 (t, 3H, J=7.3 Hz).

Provenance & Evidence