反应详情

4-(4-Tert-butoxyphenoxy)tetrahydro-2H-pyran (257 mg, 1.027 mmole) was taken up in TFA (5 mL) at RT. After 90 min the mixture was concentrated. The residue was taken up in saturated aqueous NaHCO3 and extracted with CH2Cl2 (3×). The combined organic layers were dried (MgSO4), filtered, and concentrated to give the title compound (188 mg, 94%) as an off-white solid. 1H NMR (400 MHz, CDCl3): δ 6.82 (m, 2 H); 6.77-6.73 (m, 2 H); 4.71 (s, 1 H); 4.37-4.29 (m, 1 H); 4.03-3.95 (m, 2 H); 3.55 (m, 2 H); 2.03-1.95 (m, 2 H); 1.81-1.70 (m, 2 H).

1. concentrationAfter 90 min the mixture was concentrated
2. extractionextracted with CH2Cl2 (3×)
3. dry with materialThe combined organic layers were dried (MgSO4)
4. filtrationfiltered
5. concentrationconcentrated