Potassium Carbonate → 2,3-dihydro-2,2-bis(pent-4-enyl)-8-propyl-7-[3-[(5,6,7,8-tetrahydro-1-naphthalenyl)oxy]propoxy]-4H-1-benzopyran-4-one

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Reaction Steps

To a solution of 3.0 g (9.55 mmol) of the title product of Example 69 and 4.01 g (11 mmol) of the title product of Example 12 in 56 ml of dry dimethylformamide (DMF) was added 2.77 g (20.1 mmol) of anhydrous potassium carbonate. The resulting mixture was stirred overnight at room temperature. The solvent was removed in vacuo, and the residue was partitioned between ethyl acetate and 3N hydrochloric acid. The aqueous layer was further extracted with two portions of ethyl acetate. The combined organic extracts were washed with water and with brine, dried over magnesium sulfate, filtered, and the solvent removed under reduced pressure. Chromatography of the residue over silica gel, using 10% ethyl acetate/hexane as eluent, gave the title compound (4.19 g) as an oil.

Provenance & Evidence