2-chloropropanedial

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of (S)-tert-butyl 1-amino-1-thioxopropan-2-ylcarbamate (6.9 g, 0.03 mol), 2-chloromalonaldehyde (5.2 g, 0.049 mol) and magnesium carbonate (2.76 g, 0.03 mol) in 1,4-dioxane (400 mL) was heated at 60° C. for 3 hours and further at room temperature overnight. The reaction mixture was concentrated and the residue purified by column chromatography (50-80% EtOAc/hexane) to afford tert-butyl 1-(5-formylthiazol-2-yl)ethylcarbamate (5.5 g, 64%). LC-MS: (FA) ES+ 257. The reaction mixture was concentrated the residue purified by column chromatography (50-80% EtOAc/hexane)

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of (S)-tert-butyl 1-amino-1-thioxopropan-2-ylcarbamate (6.9 g, 0.03 mol), 2-chloromalonaldehyde (5.2 g, 0.049 mol) and magnesium carbonate (2.76 g, 0.03 mol) in 1,4-dioxane (400 mL) was heated at 60° C. for 3 hours and further at room temperature overnight. The reaction mixture was concentrated and the residue purified by column chromatography (50-80% EtOAc/hexane) to afford tert-butyl 1-(5-formylthiazol-2-yl)ethylcarbamate (5.5 g, 64%). LC-MS: (FA) ES+ 257. The reaction mixture was concentrated the residue purified by column chromatography (50-80% EtOAc/hexane)

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A suspension of 6-amino-4-(4-bromo-2-chlorophenylamino)-5-chloro-nicotinic acid methyl ester (28) (1.06 g, 2.72 mmol) and 2-chloro-malonaldehyde (587 mg, 5.43 mmol) was heated to 80° C. for 45 minutes. The solution was allowed to cool to room temperature, and then washed with saturated aqueous NaHCO3, and brine. The organic layer was dried over NaSO4, filtered, concentrated in vacuo, and purified by column chromatography (20:1 methylene chloride/methanol) to give the desired product as a dark yellow solid. The solid was triturated with ethyl acetate and isolated by filtration to provide the desired product as a yellow solid (0.436 g, 36%). MS (APCI+) m/z 442, 444, 446 (M+; Cl, Br pattern) detected. to cool to room temperature washed with saturated aqueous NaHCO3, and brine The organic layer was dried over NaSO4 filtered concentrated in vacuo purified by column chromatography (20:1 methylene chloride/methanol)

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a slurry of (5-amino-1H-[1,2,4]triazol-3-yl)-methanol (28.5 g, 150 mmol, from step 6 of example A(1)) in acetic acid was added chloromalonaldehyde (16 g, 150 mmol). The mixture was heated to 80° C. for 4 hours. Upon cooling of the reaction, the product crystallized out as a white solid (25.5 g, 92%). 1H NMR (300 MHz, DMSO-d6): δ 4.67 (s, 2 H), 5.62 (s, 1 H), 8.94 (d, J=2.45 Hz, 1 H), 9.81 (d, J=2.45 Hz, 1 H). Upon cooling of the reaction the product crystallized out as a white solid (25.5 g, 92%)

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a slurry of (5-amino-1H-[1,2,4]triazol-3-yl)-methanol (28.5 g, 150 mmol, from step 6 of example A(1)) in acetic acid was added chloromalonaldehyde (16 g, 150 mmol). The mixture was heated to 80° C. for 4 hours. Upon cooling of the reaction, the product crystallized out as a white solid (25.5 g, 92%). 1H NMR (300 MHz, DMSO-d6): δ 4.67 (s, 2 H), 5.62 (s, 1 H), 8.94 (d, J=2.45 Hz, 1 H), 9.81 (d, J=2.45 Hz, 1 H). Upon cooling of the reaction the product crystallized out as a white solid (25.5 g, 92%)

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a slurry of (3-amino-1H-1,2,4-triazol-5-yl)methanol (28.5 g, 150 mmol) in acetic acid was added chloromalonaldehyde (16 g, 150 mmol). The mixture was heated to 80° C. for 4 hours. Upon cooling of the reaction to room temperature, the product crystallized out as a white solid (25.5 g, 92%). 1H NMR (300 MHz, DMSO-D6) δ: 4.67 (s, 2 H), 5.62 (s, 1 H), 8.94 (d, J=2.45 Hz, 1 H), 9.81 (d, J=2.45 Hz, 1 H). MS (APCI): 185.0 (M+H+). Upon cooling of the reaction to room temperature the product crystallized out as a white solid (25.5 g, 92%)

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a slurry of (3-amino-1H-1,2,4-triazol-5-yl)methanol (28.5 g, 150 mmol) in acetic acid was added chloromalonaldehyde (16 g, 150 mmol). The mixture was heated to 80° C. for 4 hours. Upon cooling of the reaction to room temperature, the product crystallized out as a white solid (25.5 g, 92%). 1H NMR (300 MHz, DMSO-D6) δ: 4.67 (s, 2 H), 5.62 (s, 1 H), 8.94 (d, J=2.45 Hz, 1 H), 9.81 (d, J=2.45 Hz, 1 H). MS (APCI): 185.0 (M+H+). Upon cooling of the reaction to room temperature the product crystallized out as a white solid (25.5 g, 92%)

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a slurry of (3-amino-1H-1,2,4-triazol-5-yl)methanol (28.5 g, 150 mmol) in acetic acid was added chloromalonaldehyde (16 g, 150 mmol). The mixture was heated to 80° C. for 4 hours. Upon cooling of the reaction to room temperature, the product crystallized out as a white solid (25.5 g, 92%). 1H NMR (300 MHz, DMSO-D6) δ: 4.67 (s, 2 H), 5.62 (s, 1 H), 8.94 (d, J=2.45 Hz, 1 H), 9.81 (d, J=2.45 Hz, 1 H). MS (APCI): 185.0 (M+H+). Upon cooling of the reaction to room temperature the product crystallized out as a white solid (25.5 g, 92%)

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A suspension of 6-amino-4-(4-bromo-2-chlorophenylamino)-5-chloro-nicotinic acid methyl ester (28) (1.06 g, 2.72 mmol) and 2-chloro-malonaldehyde (587 mg, 5.43 mmol) was heated to 80° C. for 45 minutes. The solution was allowed to cool to room temperature, and then washed with saturated aqueous NaHCO3, and brine. The organic layer was dried over NaSO4, filtered, concentrated in vacuo, and purified by column chromatography (20:1 methylene chloride/methanol) to give the desired product as a dark yellow solid. The solid was triturated with ethyl acetate and isolated by filtration to provide the desired product as a yellow solid (0.436 g, 36%). MS (APCI+) m/z 442, 444, 446 (M+; Cl, Br pattern) detected. to cool to room temperature washed with saturated aqueous NaHCO3, and brine The organic layer was dried over NaSO4 filtered concentrated in vacuo purified by column chromatography (20:1 methylene chloride/methanol)

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A suspension of 6-amino-4-(4-bromo-2-chlorophenylamino)-5-chloro-nicotinic acid methyl ester (28) (1.06 g, 2.72 mmol) and 2-chloro-malonaldehyde (587 mg, 5.43 mmol) was heated to 80° C. for 45 minutes. The solution was allowed to cool to room temperature, and then washed with saturated aqueous NaHCO3, and brine. The organic layer was dried over NaSO4, filtered, concentrated in vacuo, and purified by column chromatography (20:1 methylene chloride/methanol) to give the desired product as a dark yellow solid. The solid was triturated with ethyl acetate and isolated by filtration to provide the desired product as a yellow solid (0.436 g, 36%). MS (APCI+) m/z 442, 444, 446 (M+; Cl, Br pattern) detected. to cool to room temperature washed with saturated aqueous NaHCO3, and brine The organic layer was dried over NaSO4 filtered concentrated in vacuo purified by column chromatography (20:1 methylene chloride/methanol)

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: tert-Butyl 3-carbamothioylpyrrolidine-1-carboxylate (5 g, 21.71 mmol), 2-chloromalonaldehyde (3.70 g, 34.7 mmol) and magnesium carbonate (1.830 g, 21.71 mmol) were combined in dioxane (100 ml). The mixture was heated to 60° C. for 3 hours, stirred overnight at room temperature and then filtered through a pad of diatomaceous earth, rinsing with dichloromethane. The filtrate was concentrated in vacuo and then purified by normal phase chromatography to provide the title compound. filtered through a pad of diatomaceous earth rinsing with dichloromethane The filtrate was concentrated in vacuo purified by normal phase chromatography

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: tert-Butyl 3-carbamothioylpyrrolidine-1-carboxylate (5 g, 21.71 mmol), 2-chloromalonaldehyde (3.70 g, 34.7 mmol) and magnesium carbonate (1.830 g, 21.71 mmol) were combined in dioxane (100 ml). The mixture was heated to 60° C. for 3 hours, stirred overnight at room temperature and then filtered through a pad of diatomaceous earth, rinsing with dichloromethane. The filtrate was concentrated in vacuo and then purified by normal phase chromatography to provide the title compound. filtered through a pad of diatomaceous earth rinsing with dichloromethane The filtrate was concentrated in vacuo purified by normal phase chromatography