1,5,6,7-Tetrahydro-4H-indol-4-one → 1-[4-(2,3-Dihydrobenzofuran-7-yl)-2-hydroxy-4-methyl-2-trifluoromethylpentyl]-1,5,6,7-tetrahydroindol-4-one

Participants

Reaction Conditions

Reaction Steps

To a suspension of 7-[1,1-dimethyl-2-(2-trifluoromethyloxiranyl)ethyl]-2,3-dihydrobenzofuran (59.2 mg, 0.21 mmol) and 1,5,6,7-tetrahydroindol-4-one (56.0 mg, 0.41 mmol) in 0.4 mL of anhydrous ethanol was added 0.077 mL of sodium ethoxide solution (21 wt % in ethanol). The reaction mixture was then heated at 85° C. for 16 hours. The resulting mixture was poured into half-saturated sodium bicarbonate and extracted with ethyl acetate. The combined organic phases were dried over sodium sulfate, filtered, and concentrated in vacuo. The residue was purified by silica gel chromatography (eluted with 35% ethyl acetate-hexanes) to give 58.4 mg (66% yield) of the title compound as a white solid, m.p. 145° C.-146° C.

Provenance & Evidence