3-ethoxyprop-2-enoyl chloride

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

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

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

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

Conditions: temp:40.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 100 Grams of m-aminobenzoic acid was suspended in 1 liter of diethyl ether, and at a room temperature with stirring 44.6 g of β-ethoxyacrylic chloride was added dropwise. Then the reaction mixture was heated at 40° C. for 5 hours. After the reaction was completed, the precipitated matter was collected by filtration and washed with water three times, and dried, and recrystallized from methanol to obtain 60 g of m-carboxy-N-(β-ethoxyacryloyl)aniline. Colorless cotton-like crystals. Melting point: 200.5°-202° C. was added dropwise the precipitated matter was collected by filtration washed with water three times dried recrystallized from methanol

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

Procedure: To a mixture of N-(1-benzyl-4-piperidinyl)aniline (0.9 g), diisopropyl ether (30 ml) and triethylamine (0.5 g) is added β-ethoxyacrylic acid chloride (0.7 g) in portions at 60° C. After refluxing for 1 hour, the reaction mixture is poured into ice-water and extracted with ethyl acetate. The extract is dried and concentrated and to the resulting residue is added n-hexane and the formed crystals are separated by filtration and recrystallized from n-hexane to give N-(β-ethoxyacryloyl)-N-(1-benzyl-4-piperidinyl)aniline (1.1 g) as white powders, m.p. 106°-108° C. After refluxing for 1 hour extracted with ethyl acetate The extract is dried concentrated and to the resulting residue is added n-hexane the formed crystals are separated by filtration recrystallized from n-hexane

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

Procedure: To a mixture of N-(1-benzyl-4-piperidinyl)aniline (0.9 g), diisopropyl ether (30 ml) and triethylamine (0.5 g) is added β-ethoxyacrylic acid chloride (0.7 g) in portions at 60° C. After refluxing for 1 hour, the reaction mixture is poured into ice-water and extracted with ethyl acetate. The extract is dried and concentrated and to the resulting residue is added n-hexane and the formed crystals are separated by filtration and recrystallized from n-hexane to give N-(β-ethoxyacryloyl)-N-(1-benzyl-4-piperidinyl)aniline (1.1 g) as white powders, m.p. 106°-108° C. After refluxing for 1 hour extracted with ethyl acetate The extract is dried concentrated and to the resulting residue is added n-hexane the formed crystals are separated by filtration recrystallized from n-hexane

Conditions: temp:20.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a cold stirring solution of 2-chloro-6-methylaniline (59.5 g 0.42 mol) and pyridine (68 ml, 0.63 mol) in THF (600 mL) was added 3-ethoxyacryloyl chloride (84.7 g, 0.63 mol) slowly keeping the temp at 0-5° C. The mixture was then warmed and stirred for 2 h. at 20° C. Hydrochloric acid (1N, 115 mL) was added at 0-10° C. The mixture was diluted with water (310 mL) and the resulting solution was concentrated under vacuum to a thick slurry. The slurry was diluted with toluene (275 mL) and stirred for 15 min. at 20-22° C. then 1 h. at 0° C. The solid was collected by vacuum filtration, washed with water (2×75 mL) and dried to give 74.1 g (73.6% yield) of (E)-N-(2-chloro-6-methylphenyl)-3-ethoxyacrylamide). 1H NMR (400 Hz, DMSO-d6) δ 1.26 (t, 3H, J=7 Hz), 2.15 (s, 3H), 3.94 (q, 2H, J=7 Hz), 5.58 (d, 1H, J=12.4 Hz), 7.10-7.27 (m, 2H, J=7.5 Hz), 7.27-7.37 (d, 1H, J=7.5 Hz), 7.45 (d, 1H, J=12.4 Hz), 9.28 (s, 1H); 13C NMR (100 MHz, CDCl3) δ: 14.57, 18.96, 67.17, 97.99, 126.80, 127.44, 129.07, 131.32, 132.89, 138.25, 161.09, 165.36. at 0-5° C The mixture was then warmed the resulting solution was concentrated under vacuum to a thick slurry The slurry was diluted with toluene (275 mL) stirred for 15 min. at 20-22° C. 1 h. at 0° C The solid was collected by vacuum filtration washed with water (2×75 mL) dried

Conditions: temp:20.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a cold stirring solution of 2-chloro-6-methylaniline (59.5 g 0.42 mol) and pyridine (68 ml, 0.63 mol) in THF (600 mL) was added 3-ethoxyacryloyl chloride (84.7 g, 0.63 mol) slowly keeping the temp at 0-5° C. The mixture was then warmed and stirred for 2 h. at 20° C. Hydrochloric acid (1N, 115 mL) was added at 0-10° C. The mixture was diluted with water (310 mL) and the resulting solution was concentrated under vacuum to a thick slurry. The slurry was diluted with toluene (275 mL) and stirred for 15 min. at 20-22° C. then 1 h. at 0° C. The solid was collected by vacuum filtration, washed with water (2×75 mL) and dried to give 74.1 g (73.6% yield) of (E)-N-(2-chloro-6-methylphenyl)-3-ethoxyacrylamide). 1H NMR (400 Hz, DMSO-d6) δ 1.26 (t, 3H, J=7 Hz), 2.15 (s, 3H), 3.94 (q, 2H, J=7 Hz), 5.58 (d, 1H, J=12.4 Hz), 7.10-7.27 (m, 2H, J=7.5 Hz), 7.27-7.37 (d, 1H, J=7.5 Hz), 7.45 (d, 1H, J=12.4 Hz), 9.28 (s, 1H); 13C NMR (100 MHz, CDCl3) δ: 14.57, 18.96, 67.17, 97.99, 126.80, 127.44, 129.07, 131.32, 132.89, 138.25, 161.09, 165.36. at 0-5° C The mixture was then warmed the resulting solution was concentrated under vacuum to a thick slurry The slurry was diluted with toluene (275 mL) stirred for 15 min. at 20-22° C. 1 h. at 0° C The solid was collected by vacuum filtration washed with water (2×75 mL) dried

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

Procedure: To a mixture of N-(1-benzyl-4-piperidinyl)aniline (0.9 g), diisopropyl ether (30 ml) and triethylamine (0.5 g) is added β-ethoxyacrylic acid chloride (0.7 g) in portions at 60° C. After refluxing for 1 hour, the reaction mixture is poured into ice-water and extracted with ethyl acetate. The extract is dried and concentrated and to the resulting residue is added n-hexane and the formed crystals are separated by filtration and recrystallized from n-hexane to give N-(β-ethoxyacryloyl)-N-(1-benzyl-4-piperidinyl)aniline (1.1 g) as white powders, m.p. 106°-108° C. After refluxing for 1 hour extracted with ethyl acetate The extract is dried concentrated and to the resulting residue is added n-hexane the formed crystals are separated by filtration recrystallized from n-hexane

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

Procedure: To a mixture of N-(1-benzyl-4-piperidinyl)aniline (0.9 g), diisopropyl ether (30 ml) and triethylamine (0.5 g) is added β-ethoxyacrylic acid chloride (0.7 g) in portions at 60° C. After refluxing for 1 hour, the reaction mixture is poured into ice-water and extracted with ethyl acetate. The extract is dried and concentrated and to the resulting residue is added n-hexane and the formed crystals are separated by filtration and recrystallized from n-hexane to give N-(β-ethoxyacryloyl)-N-(1-benzyl-4-piperidinyl)aniline (1.1 g) as white powders, m.p. 106°-108° C. After refluxing for 1 hour extracted with ethyl acetate The extract is dried concentrated and to the resulting residue is added n-hexane the formed crystals are separated by filtration recrystallized from n-hexane

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

Procedure: To a solution containing 29.5 g of methyl m-aminobenzoate in 300 ml of diethyl ether, 11.53 g of β-ethoxyacrylic acid chloride was added dropwise at 17°-27° C. under stirring condition. After the addition was finished, the reaction mixture was further stirred at a room temperature for 1 hour, then the crystals thus precipitated were collected by filtration. The crystals were washed with ether, and the crude crystals were dissolved in chloroform, then the chloroform solution was washed with 0.5N-hydrochloric acid, a saturated aqueous solution of sodium hydrogencarbonate and a saturated aqueous solution of sodium chloride. The chloroform solution was dried and then chloroform was removed by distillation, and the residue thus obtained was purified by a silica gel column chromatography, then recrystallized from methanol to obtain 13.63 g of m-methoxycarbonyl-N-(β-ethoxyacryloyl)aniline in the form of colorless prism-like crystals. was added dropwise at 17°-27° C. After the addition the reaction mixture was further stirred at a room temperature for 1 hour the crystals thus precipitated were collected by filtration The crystals were washed with ether the crude crystals were dissolved in chloroform the chloroform solution was washed with 0.5N-hydrochloric acid The chloroform solution was dried chloroform was removed by distillation the residue thus obtained was purified by a silica gel column chromatography recrystallized from methanol