反应详情

Aqueous NaOH (0.4 mol/L, 52 mL, 20.8 mmol) was added to a stirred solution of trans-3-(benzyloxyethyl)cyclobutyl 4-nitrobenzoate (3.7 g, 10.4 mmol) in 80 mL 1,4-dioxane at ambient temperature. After 40 min, AcOH (0.9 mL, 15.4 mmol) was added drop by drop. After 5 min, the reaction mixture was concentrated by rotovap. The residue was partitioned between EtOAc (50 mL) and saturated NaHCO3 (2×50 mL). The organic phase was dried over MgSO4 and solvent evaporation gave light yellow oil (2.09 g, 97.5%). 1H NMR (CDCl3, 300 MHz): δ 1.71-1.78 (m, 2H), 1.94 (bs, 1H), 2.03-2.07 (m, 3H), 2.60-2.74 (m, 1H), 3.40-3.45 (t, J=6.9, 2H), 4.49 (s, 2H), 7.27-7.37 (m, 5H). 13C NMR (CDCl3, 75 MHz): δ 24.58, 36.11, 37.90, 39.95, 66.63, 69.17, 73.10, 127.65, 127.69, 128.45, 138.60.

1. waitAfter 5 min
2. concentrationthe reaction mixture was concentrated by rotovap
3. customThe residue was partitioned between EtOAc (50 mL) and saturated NaHCO3 (2×50 mL)
4. dry with materialThe organic phase was dried over MgSO4 and solvent evaporation