Hydrochloric Acid → 1-[4-(2-Fluorophenyl)-1,3-thiazol-2-yl]piperazine

Participants

Reaction Steps

To a solution tert-butyl 4-[4-(2-fluorophenyl)-1,3-thiazol-2-yl]piperazine-1-carboxylate (3.83 g, 10.5 mmol) in ethyl acetate (100 ml) was added a 4N solution (100 ml) of hydrogen chloride in ethyl acetate, and the mixture was stirred at room temperature for 12 hours. The solvent was distilled off under reduced pressure, and the residue was dissolved in water. The solution was neutralized with 1N aqueous sodium hydroxide solution, and the mixture was extracted with chloroform. The extract was washed with water and dried over anhydrous magnesium sulfate, and the solvent was distilled off under reduced pressure to give the desired product (2.61 g, 94.1%) as an oil.

Provenance & Evidence