2-CHLORO-6-FLUORO-N-HYDROXYBENZENECARBOXIMIDOYL CHLORIDE

反应条件: temp:0.00; pressure:0.00; stir:

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

实验步骤: To a solution of 2-chloro-6-fluorobenzoylchloride oxime (1.04 g, 5.00 mmol) and methyl-3-phenyl-2-propynoate (1.20 g, 7.50 mmol) in Et2O (25 ml) at 0° C. under nitrogen was added a solution of triethyl amine (0.834 ml, 6.00 mmol) in Et2O (3 ml) over 1 h. The reaction was allowed to warm to room temperature overnight (17 h). The mixture was diluted with Et2O and H2O, the layers separated, and the organic fraction was dried (MgSO4). Column chromatography (silica gel, hexane/Et2O gradient) gave the title compound (1.53 g, 92%). the layers separated the organic fraction was dried (MgSO4)

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

实验步骤: To a solution of 2-chloro-6-fluorobenzoylchloride oxime (1.04 g, 5.00 mmol) and methyl-3-phenyl-2-propynoate (1.20 g, 7.50 mmol) in Et2O (25 ml) at 0° C. under nitrogen was added a solution of triethyl amine (0.834 ml, 6.00 mmol) in Et2O (3 ml) over 1 h. The reaction was allowed to warm to room temperature overnight (17 h). The mixture was diluted with Et2O and H2O, the layers separated, and the organic fraction was dried (MgSO4). Column chromatography (silica gel, hexane/Et2O gradient) gave the title compound (1.53 g, 92%). the layers separated the organic fraction was dried (MgSO4)

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

实验步骤: To a solution of 2-chloro-6-fluorobenzaldehyde oxime (5.13 g, 29.6 mmol) in DMF (50 ml) was added a portion of N-chlorosuccinimide followed by a syringe of HCl gas (5 ml from the vapors of a conc. HCl solution). The temperature increased slightly and the rest of the N-chlorosuccinimide (total of 4.07 g, 30.5 mmol) was added. After stirring at room temperature for 1 h, ice was added and the mixture was extracted twice with diethyl ether. The combined organic fractions were washed (brine), dried (MgSO4), filtered, and concentrated. Column chromatography (silica gel, hexane/Et2O gradient) gave 2-chloro-6-fluorobenzoylchloride oxime (4.83 g, 78%). The temperature increased slightly ice was added the mixture was extracted twice with diethyl ether The combined organic fractions were washed (brine) dried (MgSO4) filtered concentrated

反应条件: temp:0.00; pressure:0.00; stir:

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

实验步骤: To a solution of (E)-2-chloro-6-fluorobenzaldehyde oxime (2 g) in 10 mL Dimethylformamide (DMF) at room temperature 0.23 g N-Chlorosuccinimide (NCS) were added. Dry hydrogen chloride was bubbled into the DMF solution until the reaction temperature rise up to 35° C. Then 1.21 g N-chloro-succinimide were added in portions, the temperature was kept at 35-45° C. The reaction mixture was cooled to room temperature and poured into 30 mL ice and extracted with ether. Combined extracts were dried and evaporated to give 2.5 g of 2-chloro-6-fluoro-N-hydroxybenzimidoyl chloride as a yellow oil. Dry hydrogen chloride was bubbled into the DMF solution until the reaction temperature rise up to 35° C Then 1.21 g N-chloro-succinimide were added in portions was kept at 35-45° C poured into 30 mL ice extracted with ether Combined extracts were dried evaporated

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

实验步骤: To a solution of (E)-2-chloro-6-fluorobenzaldehyde oxime (2 g) in 10 mL Dimethylformamide (DMF) at room temperature 0.23 g N-Chlorosuccinimide (NCS) were added. Dry hydrogen chloride was bubbled into the DMF solution until the reaction temperature rise up to 35° C. Then 1.21 g N-chloro-succinimide were added in portions, the temperature was kept at 35-45° C. The reaction mixture was cooled to room temperature and poured into 30 mL ice and extracted with ether. Combined extracts were dried and evaporated to give 2.5 g of 2-chloro-6-fluoro-N-hydroxybenzimidoyl chloride as a yellow oil. Dry hydrogen chloride was bubbled into the DMF solution until the reaction temperature rise up to 35° C Then 1.21 g N-chloro-succinimide were added in portions was kept at 35-45° C poured into 30 mL ice extracted with ether Combined extracts were dried evaporated

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

实验步骤: To a solution of 2-chloro-6-fluorobenzoylchloride oxime (1.04 g, 5.00 mmol) and methyl-3-phenyl-2-propynoate (1.20 g, 7.50 mmol) in Et2O (25 ml) at 0° C. under nitrogen was added a solution of triethyl amine (0.834 ml, 6.00 mmol) in Et2O (3 ml) over 1 h. The reaction was allowed to warm to room temperature overnight (17 h). The mixture was diluted with Et2O and H2O, the layers separated, and the organic fraction was dried (MgSO4). Column chromatography (silica gel, hexane/Et2O gradient) gave the title compound (1.53 g, 92%). the layers separated the organic fraction was dried (MgSO4)

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

实验步骤: To a solution of 2-chloro-6-fluorobenzaldehyde oxime (5.13 g, 29.6 mmol) in DMF (50 ml) was added a portion of N-chlorosuccinimide followed by a syringe of HCl gas (5 ml from the vapors of a conc. HCl solution). The temperature increased slightly and the rest of the N-chlorosuccinimide (total of 4.07 g, 30.5 mmol) was added. After stirring at room temperature for 1 h, ice was added and the mixture was extracted twice with diethyl ether. The combined organic fractions were washed (brine), dried (MgSO4), filtered, and concentrated. Column chromatography (silica gel, hexane/Et2O gradient) gave 2-chloro-6-fluorobenzoylchloride oxime (4.83 g, 78%). The temperature increased slightly ice was added the mixture was extracted twice with diethyl ether The combined organic fractions were washed (brine) dried (MgSO4) filtered concentrated