反应详情

10% Pd/C (242 mg, 0.23 mmol) was added to a solution of ethyl (±)-10,11-dihydro-10-hydroxy-3-methoxy-5H-dibenzo[a,d]cycloheptene-10-acetate (741.1 mg, 2.27 mmol) and conc. HCl (0.19 mL, 2.27 mmol) in glacial AcOH (23 mL), and the mixture was shaken on a Parr apparatus at RT under H2 (50 psi). After 6 h, the reaction was filtered through celite®, and the filter pad was washed with EtOAc. The filtrate was concentrated, and the residue was reconcentrated from toluene. The resulting faintly yellow, oily residue was chromatographed (silica gel, 20% EtOAc/hexanes) to afford the title compound as a colorless oil (643.6 mg, 91%): TLC Rf 0.57 (20% EtOAc/hexanes); 1H NMR (250 MHz, CDCl3) δ 7.05-7.22 (m, 4H), 7.01 (d, J=8.2 Hz, 1H), 6.76 (d, J=2.7 Hz, 1H), 6.67 (dd, J=8.2, 2.7 Hz, 1H), 4.30 (d, J=15.0 Hz, 1H), 4.11-4.25 (m, 2H), 3.85 (d, J=15.0 Hz, 1H), 3.70-3.90 (m, 1H), 3.77 (s, 3H), 3.31 (dd, J=15.0, 4.1 Hz, 1H), 2.93 (dd, J=15.0, 9.2 Hz, 1H), 2.64 (dd, J=15.6, 5.0 Hz, 1H), 2.52 (dd, J=15.6, 9.3 Hz, 1H), 1.27 (t, J=7.1 Hz, 3H); FTIR (CCl4) 1734, 1611, 1504, 1285, 1263, 1155, 1044 cm−1; MS (ES) m/e 333.0 (M+Na)+, 328.0 (M+NH4)+, 311.0 (M+H)+, 265.0 (M+H—EtOH)+.

1. filtrationthe reaction was filtered through celite®
2. washthe filter pad was washed with EtOAc
3. concentrationThe filtrate was concentrated
4. customThe resulting faintly yellow, oily residue was chromatographed (silica gel, 20% EtOAc/hexanes)