proline dl-form → HCID 54767260, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of (3R)-1-((2S)-1-(4-(3-(4-bromophenyl)-4-methyl-6-((tetrahydro-2H-pyran-2-yl)oxy)-2H-chromen-2-yl)phenoxy)propan-2-yl)-3-methylpyrrolidine (32 mg, 0.052 mmol; intermediate from the synthesis of Example 54), sodium methanesulfinate (12 mg, 0.118 mmol), copper iodide (11 mg, 0.058 mmol), DL-proline (12 mg, 0.104 mmol), and sodium hydroxide (5 mg, 0.125 mmol) in DMSO (0.5 mL) was heated at 95° C. overnight. The reaction mixture was diluted with ethyl acetate (20 mL), washed (50 mL sat'd NaHCO3, 50 mL brine), and dried (Na2SO4). The solvent was removed under reduced pressure, and the residue was stirred in 80% AcOH/water (0.5 mL) overnight at room temperature. The solvent was removed under reduced pressure, and the residue was purified by reverse-phase HPLC to give 4-methyl-2-(4-((S)-2-((R)-3-methylpyrrolidin-1-yl)propoxy)phenyl)-3-(4-(methylsulfonyl)phenyl)-2H-chromen-6-ol. 1H NMR (DMSO-d6; TFA salt): δ 11.60 (br, 1H), 7.93 (d, 2H), 7.62 (d, 2H), 7.34 (d, 2H), 6.92 (d, 1H), 6.83 (d, 2H), 6.64 (dd, 1H), 6.60 (br, 1H), 6.56 (d, 1H), 6.00 (s, 1H), 3.84 (m, 2H), 3.60 (m, 1H), 3.36 (m, 1H), 3.13 (s, 3H), 2.93 (m, 1H), 2.50 (m, 2H), 2.23 (m, 2H), 2.13 (s, 3H), 1.70 (m, 1H), 1.54 (m, 3H), 1.11 (m, 3H); LCMS: 534.9 (M+H)+.

Provenance & Evidence