Hydrogen Peroxide → 1-((1S,3R)-3-(((tert-butyldimethylsilyl)oxy)methyl)-5-(2-hydroxyethyl)-1-methyl-3,4-dihydroisoquinolin-2(1H)-yl)-2-(2-chloro-6-fluorophenyl)ethan-1-one

Participants

Reaction Conditions

Reaction Steps

Dissolve 1-((1S,3R)-3-(((tert-butyldimethylsilyl)oxy)methyl)-1-methyl-5-vinyl-3,4-dihydroisoquinolin-2(1H)-yl)-2-(2-chloro-6-fluorophenyl)ethan-1-one (1.54 g, 3.15 mmol) in THF (31 mL). Cool to 0° C. Add BH3 (6.3 mL, 6.3 mmol, 1M in THF). Stir 4 h at room temperature. Cool to 0° C. Add NaOH (12.6 mL, 3 M in water) and H2O2 (1.92 mL, 30% wt/wt % in water). Stir overnight at room temperature. Add ethyl acetate, wash with saturated NaHCO3 solution and brine, dry over sodium sulfate, filter, and concentrate under reduced pressure to give a residue. Purify the residue by silica gel chromatography, eluting with ethyl acetate: hexanes (gradient, 5-60%) to give 1-((1S,3R)-3-(((tert-butyldimethylsilyl)oxy)methyl)-5-(2-hydroxyethyl)-1-methyl-3,4-dihydroisoquinolin-2(1H)-yl)-2-(2-chloro-6-fluorophenyl)ethan-1-one as a white foam (1.08 g, 2.13 mmol). MS (m/z): 506.2 (M+1).

Provenance & Evidence