1,4-Dioxane hydrochloride → 8-(1-Piperazinyl)-5-(trifluoromethyl)quinoline

Participants

Reaction Steps

To a solution of tert-butyl 4-[5-(trifluoromethyl)-8-quinolinyl]-1-piperazine-carboxylate (Step 2, 0.85 g) in 5 mL dioxane was added 5 mL of 4 N HCl/dioxane. The mixture was stirred at room temperature overnight. The reaction was concentrated on a rotary evaporator, dissolved in water, neutralized with aqueous sodium hydroxide and extracted with CH2Cl2 The combined organic layers were dried over anhydrous Na2SO4, filtered and concentrated on a rotary evaporator to give 0.65 g of the desired product as an off-white solid; MP. 155-157° C.; MS (ES) m/z (relative intensity): 282 (M+H)+ (100).

Provenance & Evidence