Hydrochloric Acid → HCID 19091987, 화합물

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Ethanol (3.6 g) and tetrahydrofuran (10 ml) were dropwise added to a solution of 2-chlorosulfonylbutyl chloride (14.4 g) and tetrahydrofuran (21 ml) while cooling with ice. After stirring at room temperature for 1 hour, ethyl p-aminobenzoylacetate (13.3 g), N,N-dimethylacetamide (33 ml) and pyridine (12.2 g) were added thereto, and the mixture was heated for refluxing for 30 minutes. 0.5 N hydrochloric acid (30 ml) was added to the reaction solution, and the mixture was extracted with ethyl acetate (120 ml). The extracted solution was washed with a sodium chloride aqueous solution (120 ml), then dried over magnesium sulfate, and concentrated. An oily product, ethyl p-(1-ethoxycarbonylpropanesulfonamido)benzoylacetate was quantitatively obtained.

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