反应详情

A solution of HCl in dioxane (4.0 M, 10 mL) was added to a solution of (+/−)-2-methyl-2-(methylsulfonyl)-4-(4′-nitrobiphenyl-4-yl)-N-(tetrahydro-2H-pyran-2-yloxy)butanamide (700 mg, 1.47 mmol) in DCM (5 mL) at 0° C. The reaction was warmed to room temperature as the ice bath expired. After 4 hours the reaction was concentrated. Purification on silica by flash column chromatography (DCM/MeOH 99:1-95:5) afforded the title compound as a yellow solid (500 mg, 87%). LCMS m/z 391.1 (M−1). 1H NMR (400 MHz, DMSO-d6) δ ppm 1.57 (s, 3H) 1.87-2.01 (m, 1H) 2.35-2.59 (m, 2H) 2.64-2.80 (m, 1H) 3.05 (s, 3H) 7.41 (d, J=8.20 Hz, 2H) 7.74 (d, J=8.59 Hz, 2H) 7.88-8.06 (m, 2H) 8.22-8.39 (m, 2H) 9.23 (br. s., 1H) 10.98 (s, 1H)

1. concentrationAfter 4 hours the reaction was concentrated
2. customPurification on silica by flash column chromatography (DCM/MeOH 99:1-95:5)