4-ethoxybenzenesulfonic Acid → 2-Oxooctyl-p-ethoxybenzene sulfonate

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Reaction Steps

A 1.0 g quantity of 1-diazo-2-octanone is dissolved in 30 ml of dioxane, and 2.0 g of p-ethyoxybenzenesulfonic acid is slowly added to the solution at room temperature. The mixture is stirred until no nitrogen is evolved. The reaction mixture is distilled in a vacuum to remove the solvent, and the residue is extracted with 50 ml of ether, washed with water and dried over anhydrous sodium sulfate. The dried product is distilled in a vacuum to remove the solvent and obtain an oily product, which is purified by column chromatography (silica gel, developer solvent chloroform), affording 1.26 g of 2-oxooctyl-p-ethoxybenzene sulfonate (Compound 46), m.p. 38° to 39° C. Yield 59.0%.

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