反应详情

To a solution of 1-[(1R,2S,3S,4R,5S)-2,3,4-tribenzyloxy-5-[4-chloro-3-[(4-ethoxyphenyl)methyl]phenyl]-6,8-dioxabicyclo[3.2.1]octan-1-yl]ethanol 1m (1.71 g, 2.36 mmol) in a methanol/tetrahydrofuran mixture (v/v=4/1, 30 mL) were added o-dichlorobenzene (1.74 g, 11.8 mmol) and 10% Pd/C (250 mg, 0.236 mmol) at room temperature. The mixture was stirred under H2 at room temperature for 1.5 hours and filtered. The filtrate was concentrated in vacuo. The residue was purified by preparative HPLC (prep-HPLC) to give the title compound 1 as a white solid (544 mg, 51.3%, HPLC: 99.6%). The compound was characterized by the following spectroscopic data: MS (ESI, pos. ion) m/z: 451.2 [M+H]+; and 1H NMR (400 MHz, CDCl3) δ (ppm): 7.35 (m, 1H), 7.29-7.21 (m, 2H), 7.04 (m, 2H), 6.75 (m, 2H), 4.71 (br, 1H), 4.51 (br, 1H), 4.14 (m, 1H), 4.01 (m, 3H), 3.98 (m, 2H), 3.89 (m, 1H), 3.77 (m, 2H), 3.60 (m, 1H), 3.52 (br, 1H), 3.06 (br, 1H), 1.34 (t, 3H), 0.91 (d, 3H).

1. filtrationfiltered
2. concentrationThe filtrate was concentrated in vacuo
3. customThe residue was purified by preparative HPLC (prep-HPLC)