Sodium Carbonate → 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

Participants

Reaction Conditions

Reaction Steps

Dissolve 1-((1S,3R)-5-bromo-3-(((tert-butyldimethylsilyl)oxy)methyl)-1-methyl-3,4-dihydroisoquinolin-2(1H)-yl)-2-(2-chloro-6-fluorophenyl)ethan-1-one (1.8 g, 3.33 mmol) and vinylboronic acid dibutyl ester (1.5 mL, 6.65 mmol) in 1,4-dioxane (22 mL). Add aqueous Na2CO3 solution (11 mL, 2M in water). Degas with nitrogen 10 min Add bis(triphenylphosphine)palladium(II) chloride (467 mg, 0.67 mmol). Heat to 80° C. Stir 2 hours. Add water and extract with ethyl acetate three times. Combine the ethyl acetate extracts, 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, 5-40%) to give the title compound as a white foam (1.54 g, 3.15 mmol). MS (m/z): 488.2 (M+1).

Provenance & Evidence