Water → Tert-butyl 4-(4-iodobenzoyl)piperazine-1-carboxylate

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Reaction Steps

4-Iodobenzoyl chloride (7.99 g) and piperazine-1-carboxylic acid tert-butyl ester (5.87 g) were dissolved in tetrahydrofuran (75 ml), 1N aqueous sodium hydroxide solution (36 mL) was added, and the mixture was stirred at room temperature. The reaction mixture was poured into water under cooling and 1N aqueous sodium hydroxide solution and ethyl acetate were added, and the mixture was extracted with ethyl acetate. The organic layer was washed with 1N aqueous sodium hydroxide solution and saturated brine, then washed with saturated brine, and dried over sodium sulfate. The solvent was evaporated under reduced pressure. To the residue was added hexane and the mixture was stirred at room temperature. The crystals were collected by filtration to give the title compound (11.67 g).

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