Potassium tert-butoxide → HCID 22676722, compound

Participants

Reaction Steps

To a stirring solution of tert-butyl-3-(4-methoxyphenyl)indole-2-carboxylate (Example 105, 75 mg, 0.23 mmol) in tetrahydrofuran (0.4 mL) was added potassium tert-butoxide (1 M in tetrahydrofuran, 0.4 mL) in one aliquot. After 10 minutes chloro[3-(trifluoromethyl)phenyl]sulfone (113 mg, 0.46 mmol) was added. The reaction mixture was stirred at room temperature overnight. The resulting mixture was diluted with ethyl acetate (4 mL) and quenched with water (2 mL). The organic phase was extracted with ethyl acetate (3×4 mL). The combined organic layers were dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The crude product was filtered through a plug of silica gel (30% ethyl acetate/hexane) to provide tert-butyl 3-(4-methoxyphenyl)-1-{[3-(trifluoromethyl)phenyl]sulfonyl}indole-2-carboxylate (45 mg, 37%), which was used in the next step without further purification.

Provenance & Evidence