Hydrochloric Acid → HCID 117986083, compound

Participants

Reaction Steps

To a solution of (1R,2R,3S,4R,5S)-3,4-dibenzyloxy-5-[4-chloro-3-[(4-ethoxyphenyl)methyl]phenyl]-1-(1-hydroxyethyl)-6,8-dioxabicyclo[3.2.1]octan-2-ol 281 (140 mg, 0.22 mmol) in a methanol/tetrahydrofuran mixture (v/v=4/1, 20 mL) were added hydrochloric acid (0.03 mL, 1.1 lmmol) and Pd/C (23 mg, 0.02 mmol, 10%) at room temperature. The mixture was stirred at room temperature under H2 for 1 hour and filtered. The filtrate was adjusted with saturated aqueous sodium bicarbonate till pH becomes 7 and extracted with ethyl acetate (10 mL×3). The combined organic layers were washed with water (10 mL×3) and saturated aqueous sodium chloride (10 mL×2), dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated in vacuo. The residue was purified by silica gel chromatography eluted with EtOAc to give the title compound 28 as a white solid (14 mg, 14.1%, HPLC: 86.0%). The compound was characterized by the following spectroscopic data: 1H NMR (600 MHz, DMSO-d6) δ(ppm): 7.45 (s, 1H), 7.40 (m, 1H), 7.34 (m, 1H), 7.10 (d, 2H), 6.83 (d, 2H), 5.35-5.30 (m, 1H), 4.78 (d, 1H), 4.68 (s, 2H), 4.60 (d, 1H), 4.21-4.16 (m, 1H), 4.02-3.95 (m, 4H), 3.82-3.75 (m, 1H), 3.71 (d, 1H), 3.66-3.55 (m, 2H), 1.30 (t, 3H), 1.02 (d, 3H); and MS (ESI, pos. ion) m/z: 451.1[M+H]+.

Provenance & Evidence