1-(四氢呋喃-2-基甲基)哌啶-4-胺

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Triethylamine (5.6 ml; 0.04 moles) and ethyl chloroformate (3.84 ml; 0.04 moles) were added successively to a stirred suspension of 2-ethoxy-4-amino5-chlorobenzoic acid (8.6 g; 0.04 moles) in anhydrous tetrahydrofuran (300 ml) whilst maintaining the temperature between -5° and -10° C. After stirring at this temperature for 0.5 hours, a solution of 1-(2-tetrahydrofurylmethyl)-4-aminopiperidine (8.0 g; 0.04 moles) in anhydrous tetrahydrofuran (50 ml) was added, the temperature was maintained at -5° to -10° C. for 1 hour and then allowed overnight to reach room temperature. The solvent of the mixture was removed in vacuo, the residue poured into water, extracted with chloroform and the organic layers washed with water. The chloroformic solution was dried (Na2SO4) and the solvent removed in vacuo to give an oil which was treated with the stoichiometric amount of fumaric acid in boiling absolute ethanol. N-[1-(2-Tetrahydrofurylmethyl)-piperid-4-yl]-2-ethoxy-4-amino-5-chlorobenzamide hydrogen fumarate (10.6 g) was thus obtained, m.p. 199°-201° C. (d). whilst maintaining the temperature between -5° and -10° C the temperature was maintained at -5° to -10° C. for 1 hour allowed overnight to reach room temperature The solvent of the mixture was removed in vacuo the residue poured into water extracted with chloroform the organic layers washed with water The chloroformic solution was dried (Na2SO4) the solvent removed in vacuo to give an oil which

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A solution of 1-(2-tetrahydrofurylmethyl)piperid-4-one oxime (42.5 g; 0.22 moles) in anhydrous tetrahydrofuran (700 ml) was added dropwise to a suspension of lithium aluminium hydride (24.4 g; 0.64 moles) in anhydrous tetrahydrofuran (300 ml). The reaction mixture was left with stirring at room temperature overnight and then, water (24.5 ml), 4N sodium hydroxide aqueous solution (24.5 ml) and water (73.5 ml) were successively added, filtered, the filtrates dried (Na2SO4) and brought to dryness in vacuo. The resulting oil (28 g) was distilled to give 1-(2-tetrahydrofurylmethyl)-4-aminopiperidine, boiling point 94°-98° C./0.2 mm Hg. The reaction mixture was left filtered the filtrates dried (Na2SO4) The resulting oil (28 g) was distilled

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A solution of 1-(2-tetrahydrofurylmethyl)piperid-4-one oxime (42.5 g; 0.22 moles) in anhydrous tetrahydrofuran (700 ml) was added dropwise to a suspension of lithium aluminium hydride (24.4 g; 0.64 moles) in anhydrous tetrahydrofuran (300 ml). The reaction mixture was left with stirring at room temperature overnight and then, water (24.5 ml), 4N sodium hydroxide aqueous solution (24.5 ml) and water (73.5 ml) were successively added, filtered, the filtrates dried (Na2SO4) and brought to dryness in vacuo. The resulting oil (28 g) was distilled to give 1-(2-tetrahydrofurylmethyl)-4-aminopiperidine, boiling point 94°-98° C./0.2 mm Hg. The reaction mixture was left filtered the filtrates dried (Na2SO4) The resulting oil (28 g) was distilled

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Triethylamine (5.6 ml; 0.04 moles) and ethyl chloroformate (3.84 ml; 0.04 moles) were added successively to a stirred suspension of 2-ethoxy-4-amino5-chlorobenzoic acid (8.6 g; 0.04 moles) in anhydrous tetrahydrofuran (300 ml) whilst maintaining the temperature between -5° and -10° C. After stirring at this temperature for 0.5 hours, a solution of 1-(2-tetrahydrofurylmethyl)-4-aminopiperidine (8.0 g; 0.04 moles) in anhydrous tetrahydrofuran (50 ml) was added, the temperature was maintained at -5° to -10° C. for 1 hour and then allowed overnight to reach room temperature. The solvent of the mixture was removed in vacuo, the residue poured into water, extracted with chloroform and the organic layers washed with water. The chloroformic solution was dried (Na2SO4) and the solvent removed in vacuo to give an oil which was treated with the stoichiometric amount of fumaric acid in boiling absolute ethanol. N-[1-(2-Tetrahydrofurylmethyl)-piperid-4-yl]-2-ethoxy-4-amino-5-chlorobenzamide hydrogen fumarate (10.6 g) was thus obtained, m.p. 199°-201° C. (d). whilst maintaining the temperature between -5° and -10° C the temperature was maintained at -5° to -10° C. for 1 hour allowed overnight to reach room temperature The solvent of the mixture was removed in vacuo the residue poured into water extracted with chloroform the organic layers washed with water The chloroformic solution was dried (Na2SO4) the solvent removed in vacuo to give an oil which

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A solution of 1-(2-tetrahydrofurylmethyl)piperid-4-one oxime (42.5 g; 0.22 moles) in anhydrous tetrahydrofuran (700 ml) was added dropwise to a suspension of lithium aluminium hydride (24.4 g; 0.64 moles) in anhydrous tetrahydrofuran (300 ml). The reaction mixture was left with stirring at room temperature overnight and then, water (24.5 ml), 4N sodium hydroxide aqueous solution (24.5 ml) and water (73.5 ml) were successively added, filtered, the filtrates dried (Na2SO4) and brought to dryness in vacuo. The resulting oil (28 g) was distilled to give 1-(2-tetrahydrofurylmethyl)-4-aminopiperidine, boiling point 94°-98° C./0.2 mm Hg. The reaction mixture was left filtered the filtrates dried (Na2SO4) The resulting oil (28 g) was distilled