Morpholine → HCID 68911598, compound

Participants

Reaction Steps

To a mixture of ethyl 2-chloro-4-nitrobenzoate (1.5 g), palladium acetate (73.3 mg), 2-(dicyclohexylphosphino)biphenyl (229 mg), tripotassium phosphate (1.94 g) and morpholine (0.57 mL) was added 1,2-dimethoxyethane (23 mL), and the mixture was stirred with heating under reflux for 8 hr. Water was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, and the solvent was evaporated. The obtained residue was purified by column chromatography (ethyl acetate:hexane) to give ethyl 2-(morpholin-4-yl)-4-nitrobenzoate (220 mg). The obtained ethyl 2-(morpholin-4-yl)-4-nitrobenzoate (220 mg) and 1-(2,4-dimethylphenyl)piperazine (149 mg) were dissolved in ethanol (3.5 mL), 1N aqueous sodium hydroxide solution (1.1 mL) was added, and the mixture was stirred at 50° C. To the reaction mixture was added 1N hydrochloric acid (1.1 mL), 1-(2,4-dimethylphenyl)piperazine (149 mg) and 4-(4,6-dimethoxy[1.3.5]triazin-2-yl)-4-methylmorpholinium chloride hydrate (DMT-MM) (218 mg) were added, and the mixture was stirred at room temperature overnight. To the reaction mixture was added saturated brine, and the mixture was extracted with ethyl acetate. The solvent was evaporated from the organic layer, the obtained residue was purified by silica gel column chromatography to give [4-(2,4-dimethylphenyl)piperazin-1-yl][2-(morpholin-4-yl)-4-nitrophenyl]methanone (206 mg). Then, to a solution of ethanol (3 mL) and water (1 mL) were added ammonium chloride (294 mg) and iron (211 mg), and the obtained [4-(2,4-dimethylphenyl)piperazin-1-yl][2-(morpholin-4-yl)-4-nitrophenyl]methanone (206 mg) was added while stirring at 60° C.-70° C. After completion of the reaction, the insoluble material was collected by filtration, and the filtrate was concentrated. To the obtained residue was added aqueous sodium hydrogen carbonate solution, and the mixture was extracted with ethyl acetate. The solvent was evaporated from the organic layer to give the title compound (188 mg).

Provenance & Evidence