Ethyl 3-iodobenzoate → ethyl 3-(((5aR,6S)-1-(4-fluorophenyl)-5a-methyl-5,5a,6,7,8,9-hexahydroimidazo[1,5-b]isoquinolin-6-yl)(hydroxy)methyl)benzoate

Participants

Reaction Steps

To a stirred solution of ethyl 3-iodobenzoate (0.17 mL, 1 mmol) in anhydrous THF (2 mL) cooled in an acetonitrile-dry ice bath was added isopropylmagnesium chloride solution (2M in THF, 0.5 mL, 1 mmol) dropwise under nitrogen. The reaction mixture was stirred at the same temperature for 30 min before (5aR,6S)-1-(4-fluorophenyl)-5a-methyl-5,5a,6,7,8,9-hexahydroimidazo[1,5-b]isoquinoline-6-carbaldehyde (Example 1g, 55 mg, 0.18 mmol) was added. The mixture was stirred in an acetonitrile-dry ice bath for 1 hr before being quenched by the addition of saturated aqueous ammonium chloride solution (3 mL) at the same temperature. The reaction mixture was extracted with ethyl acetate (3×3 mL). The combined organic solutions were dried (Na2SO4) and concentrated. Silica gel flash chromatography (25-100% ethyl acetate in heptanes, then 0-10% methanol in ethyl acetate) gave ethyl 3-(((5aR,6S)-1-(4-fluorophenyl)-5a-methyl-5,5a,6,7,8,9-hexahydroimidazo[1,5-b]isoquinolin-6-yl)(hydroxy)methyl)benzoate as a solid.

Provenance & Evidence