Tributylphosphine → Ethyl 5-[4-(methylsulfonyl)phenoxy]-7-(tetrahydro-2H-pyran-4-ylmethoxy)-1H-indole-2-carboxylate

Participants

Reaction Conditions

Reaction Steps

A mixture of ethyl 7-hydroxy-5-[4-(methylsulfonyl)phenoxy]-1H-indole-2-carboxylate (400 mg), tetrahydro-2H-pyran-4-ylmethanol (250 mg), 1,1′-(azodicarbonyl)dipiperidine (540 mg), tributylphosphine (0.5 mL) and tetrahydrofuran (10 mL) was stirred at 50° C. for 13 hr. The reaction solution was allowed to cool to room temperature, and the precipitated solid was filtered off. The filtrate was concentrated under reduced pressure, and the residue was subjected to basic silica gel column chromatography (ethyl acetate:hexane=3:97-45:55, volume ratio) to give the crude title compound (650 mg) as an orange oil. MS 474 (MH+).

Provenance & Evidence