反应详情

To a solution of 1-isopropyl-4-(4-nitro-phenyl)-piperazine (8.3 g, 33.2 mmol) in MeOH (120 mL) is added tin (II) dichloride dihydrate (37.4 g, 0.165 mol). The mixture is cooled using a water bath and conc. HCl is added (36 mL). The reaction is stirred at room temperature overnight. After removing the methanol, the resultant solution is basified using conc. NaOH (pH 11). The water phase is extracted with diethyl ether. The combined organic layer are dried (MgSO4), filtered and the solvent is removed under reduced pressure to afford the title compound (6.4 g, 88%).

1. temperatureThe mixture is cooled
2. customAfter removing the methanol
3. extractionThe water phase is extracted with diethyl ether
4. dry with materialThe combined organic layer are dried (MgSO4)
5. filtrationfiltered
6. customthe solvent is removed under reduced pressure