1-(4-氟苯基)-2-甲基肼

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:115.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A mixture of 1-(4-fluorophenyl)-2-methylhydrazine (0.6 g, 4.28 mmol), diethyl 2-acetylmalonate (0.96 g, 4.75 mmol), and acetic acid (0.51 g, 8.49 mmol) in water (15 mL) is heated at 115° C. for 3 hours. The reaction is cooled and extracted with EtOAc twice. The organic phase is washed with saturated aqueous sodium chloride, dried over Na2SO4 and concentrated. The residue is purified by column chromatography on silica gel, eluting with DCM:MeOH (from 150:1 to 60:1) to afford the title compound (0.59 g, 49.5% yield). MS (m/z): 279 (M+H). The reaction is cooled extracted with EtOAc twice The organic phase is washed with saturated aqueous sodium chloride dried over Na2SO4 concentrated The residue is purified by column chromatography on silica gel eluting with DCM

反应条件: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a mixture of LiAlH4 (1.1 g) in THF (15 mL) is added a solution of ethyl 2-(4-fluorophenyl)hydrazinecarboxylate (1.9 g, 9.59 mmol) in THF (10 mL) dropwise under nitrogen in an ice-salt bath. After the addition, the ice bath is removed and the mixture is heated to 60° C. overnight. The reaction is cooled and quenched with water. The precipitate is filtered and washed with EtOAc. The organic phase is separated, dried over Na2SO4, and concentrated. The residue is purified by flash chromatography, eluting with PE:EtOAc (80:1 to 60:1) to afford the title compound (1 g, 74% yield). MS (m/z): 141 (M+H). After the addition the ice bath is removed The reaction is cooled quenched with water The precipitate is filtered washed with EtOAc The organic phase is separated dried over Na2SO4 concentrated The residue is purified by flash chromatography eluting with PE

反应条件: temp:115.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A mixture of 1-(4-fluorophenyl)-2-methylhydrazine (0.6 g, 4.28 mmol), diethyl 2-acetylmalonate (0.96 g, 4.75 mmol), and acetic acid (0.51 g, 8.49 mmol) in water (15 mL) is heated at 115° C. for 3 hours. The reaction is cooled and extracted with EtOAc twice. The organic phase is washed with saturated aqueous sodium chloride, dried over Na2SO4 and concentrated. The residue is purified by column chromatography on silica gel, eluting with DCM:MeOH (from 150:1 to 60:1) to afford the title compound (0.59 g, 49.5% yield). MS (m/z): 279 (M+H). The reaction is cooled extracted with EtOAc twice The organic phase is washed with saturated aqueous sodium chloride dried over Na2SO4 concentrated The residue is purified by column chromatography on silica gel eluting with DCM

反应条件: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a mixture of LiAlH4 (1.1 g) in THF (15 mL) is added a solution of ethyl 2-(4-fluorophenyl)hydrazinecarboxylate (1.9 g, 9.59 mmol) in THF (10 mL) dropwise under nitrogen in an ice-salt bath. After the addition, the ice bath is removed and the mixture is heated to 60° C. overnight. The reaction is cooled and quenched with water. The precipitate is filtered and washed with EtOAc. The organic phase is separated, dried over Na2SO4, and concentrated. The residue is purified by flash chromatography, eluting with PE:EtOAc (80:1 to 60:1) to afford the title compound (1 g, 74% yield). MS (m/z): 141 (M+H). After the addition the ice bath is removed The reaction is cooled quenched with water The precipitate is filtered washed with EtOAc The organic phase is separated dried over Na2SO4 concentrated The residue is purified by flash chromatography eluting with PE