p-Bromochlorobenzene → [4-(4-Chloro-phenoxy)-phenylsulfanyl]-acetic acid ethyl ester

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Reaction Steps

A mixture of 4-bromo chlorobenzene (1.92 g, 10 mmol), (4-Hydroxy-phenylsulfanyl)-acetic acid ethyl ester (2.12 g, 10 mmol), sodium hydride (460 mg, 10 mmol) and copper(II) chloride (500 mg) was refluxed in anhydrous pyridine (50 ml) for 12 hrs. The reaction mixture was carefullly quenched with ice cold water and acidified with concentrated HCl. The product was extracted with chloroform, washed well with water; dried and concentrated. The product was purified by silica gel column chromatography by eluting with 30% ethyl acetate:hexane. Yield 2.5 g (77%); Colorless low melting solid; MS: 323 (M+H)+. Alternatively the title compound may be prepared from 4-(4-chloro-phenoxy)-benzenethiol and bromo ethyl acetate as described in example 83.

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