3-Chloro-4-formylbenzonitrile

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The title compound is prepared in analogy to tert-butyl (4-cyano-2-methylphenyl)(6-oxo-2-(3-(trifluoromethyl)phenylamino)cyclohex-1-enyl)methylcarbamate (intermediate 51), using 3-chloro-4-formylbenzonitrile (500 mg, 6.04 mmol) as starting material. Yield: 1.05 g; ESI mass spectrum [M+H]+=520; Retention time HPLC: 0.81 min (X012_S01). 0.81 min (X012_S01)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The title compound is prepared in analogy to tert-butyl (4-cyano-2-methylphenyl)(6-oxo-2-(3-(trifluoromethyl)phenylamino)cyclohex-1-enyl)methylcarbamate (intermediate 51), using 3-chloro-4-formylbenzonitrile (500 mg, 6.04 mmol) as starting material. Yield: 1.05 g; ESI mass spectrum [M+H]+=520; Retention time HPLC: 0.81 min (X012_S01). 0.81 min (X012_S01)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The crude 3-chloro-4-[2-(dimethylamino)vinyl]benzonitrile obtained in this way is taken up in 500 ml of THF/water (1:1), and 77.6 g (362.9 mmol) of sodium periodate are added. The mixture is stirred at room temperature for 18 h, and then the precipitate which has separated out is removed by filtration. The filtrate is mixed with saturated sodium bicarbonate solution and extracted three times with ethyl acetate. The combined organic phases are dried with sodium sulfate, and the solvent is removed in a rotary evaporator. The crude product is purified by column chromatography (silica gel, mobile phase: cyclohexane/ethyl acetate 7:3). 3.0 g (15% of theory) of the title compound are obtained. the precipitate which has separated out is removed by filtration The filtrate is mixed with saturated sodium bicarbonate solution extracted three times with ethyl acetate The combined organic phases are dried with sodium sulfate the solvent is removed in a rotary evaporator The crude product is purified by column chromatography (silica gel, mobile phase: cyclohexane/ethyl acetate 7:3)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The crude 3-chloro-4-[2-(dimethylamino)vinyl]benzonitrile obtained in this way is taken up in 500 ml of THF/water (1:1), and 77.6 g (362.9 mmol) of sodium periodate are added. The mixture is stirred at room temperature for 18 h, and then the precipitate which has separated out is removed by filtration. The filtrate is mixed with saturated sodium bicarbonate solution and extracted three times with ethyl acetate. The combined organic phases are dried with sodium sulfate, and the solvent is removed in a rotary evaporator. The crude product is purified by column chromatography (silica gel, mobile phase: cyclohexane/ethyl acetate 7:3). 3.0 g (15% of theory) of the title compound are obtained. the precipitate which has separated out is removed by filtration The filtrate is mixed with saturated sodium bicarbonate solution extracted three times with ethyl acetate The combined organic phases are dried with sodium sulfate the solvent is removed in a rotary evaporator The crude product is purified by column chromatography (silica gel, mobile phase: cyclohexane/ethyl acetate 7:3)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 300 mg (1.812 mmol) of 3-chloro-4-formylbenzonitrile, 181.4 mg (1.812 mmol) of 2,4-pentanedione, 163.2 mg (2.72 mmol) of acetic acid and 30.9 mg (0.36 mmol) of piperidine are dissolved in 15 ml of dichloromethane and heated under reflux with an inverse water trap overnight. The mixture shows complete conversion (TLC check, mobile phase: cyclohexane/ethyl acetate 5:1). The mixture is diluted with dichloromethane, washed with water and saturated sodium chloride solution and dried with sodium sulfate. The solvent is removed in a rotary evaporator. 403 mg (89.8% of theory) of 4-(2-acetyl-3-oxobut-1-en-1-yl)-3-chlorobenzonitrile are obtained and are reacted without further purification. heated under reflux with an inverse water trap overnight washed with water and saturated sodium chloride solution dried with sodium sulfate The solvent is removed in a rotary evaporator

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The crude 3-chloro-4-[2-(dimethylamino)vinyl]benzonitrile obtained in this way is taken up in 500 ml of THF/water (1:1), and 77.6 g (362.9 mmol) of sodium periodate are added. The mixture is stirred at room temperature for 18 h, and then the precipitate which has separated out is removed by filtration. The filtrate is mixed with saturated sodium bicarbonate solution and extracted three times with ethyl acetate. The combined organic phases are dried with sodium sulfate, and the solvent is removed in a rotary evaporator. The crude product is purified by column chromatography (silica gel, mobile phase: cyclohexane/ethyl acetate 7:3). 3.0 g (15% of theory) of the title compound are obtained. the precipitate which has separated out is removed by filtration The filtrate is mixed with saturated sodium bicarbonate solution extracted three times with ethyl acetate The combined organic phases are dried with sodium sulfate the solvent is removed in a rotary evaporator The crude product is purified by column chromatography (silica gel, mobile phase: cyclohexane/ethyl acetate 7:3)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The title compound is prepared in analogy to tert-butyl (4-cyano-2-methylphenyl)(6-oxo-2-(3-(trifluoromethyl)phenylamino)cyclohex-1-enyl)methylcarbamate (intermediate 51), using 3-chloro-4-formylbenzonitrile (500 mg, 6.04 mmol) as starting material. Yield: 1.05 g; ESI mass spectrum [M+H]+=520; Retention time HPLC: 0.81 min (X012_S01). 0.81 min (X012_S01)