2-chloro-1-(4-chloro-2-fluorophenyl)ethanone

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

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

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

Procedure: Combine 2-chloro-1-(4-chloro-2-fluorophenyl)ethanone (1.5 kg, 5.44 mol), and (E)-N′-(6-chloropyridazin-3-yl)-N,N-dimethylacetimidamide (1.19 kg, 5.72 mol) in DMF (10.14 L) and heat at 120° C. for 5 h. After cooling, add water (30 L) and stir to crystallize the product. Collect the product by filtration and rinse the cake with water (2×12 L) and heptanes (2×10 L) then dry under vacuum to obtain title compound. (1.490 kg, 84.44%; mp=160° C., M+=324). After cooling to crystallize the product Collect the product by filtration rinse the cake with water (2×12 L) and heptanes (2×10 L) then dry under vacuum

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

Procedure: Stir a mixture of heptanes (1.5 L), methanol (0.4 L), and 1-(4-chloro-2-fluorophenyl)ethanone (1 kg, 5.81 mol) with cooling to <5° C. Add sulfuryl chloride (0.608 L, 1.02 kg, 7.55 mol) as a heptanes (1.5 L) solution drop-wise to the mixture keeping the reaction temperature <15° C. during the addition. After 2 h quench the reaction at ambient temperature to a pH of 6 with sodium hydroxide (5N, 2.0 L). Extract the reaction mixture with methylene chloride (2 L) and concentrate the extract to form a white solid. Filter and dry the solid. with cooling to <5° C the reaction temperature <15° C. during the addition After 2 h quench the reaction at ambient temperature to a pH of 6 with sodium hydroxide (5N, 2.0 L) Extract the reaction mixture with methylene chloride (2 L) concentrate the extract to form a white solid Filter dry the solid

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

Procedure: Stir a mixture of heptanes (1.5 L), methanol (0.4 L), and 1-(4-chloro-2-fluorophenyl)ethanone (1 kg, 5.81 mol) with cooling to <5° C. Add sulfuryl chloride (0.608 L, 1.02 kg, 7.55 mol) as a heptanes (1.5 L) solution drop-wise to the mixture keeping the reaction temperature <15° C. during the addition. After 2 h quench the reaction at ambient temperature to a pH of 6 with sodium hydroxide (5N, 2.0 L). Extract the reaction mixture with methylene chloride (2 L) and concentrate the extract to form a white solid. Filter and dry the solid. with cooling to <5° C the reaction temperature <15° C. during the addition After 2 h quench the reaction at ambient temperature to a pH of 6 with sodium hydroxide (5N, 2.0 L) Extract the reaction mixture with methylene chloride (2 L) concentrate the extract to form a white solid Filter dry the solid

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In a round bottom flask combine (E)-N′-(6-chloropyridazin-3-yl)-N,N-dimethylacetimidamide (36.61 g, 184.3 mmol), 2-chloro-1-(4-chloro-2-fluorophenyl)ethanone (38.15 g, 1 equiv.), and dimethylformamide (150 mL). Place under nitrogen then heat at 120° C. for 4 h. Let cool to RT and stir overnight. Dilute with EA (1 L) and water (500 mL). Extract organics three times with water followed by aqueous saturated sodium chloride aqueous. Dry organics over anhydrous magnesium sulfate. Filter and concentrate in vacuo. Purify by silica plug (hexane→4:1 hexane:EA→3:1 hexane:EA→2:1 hexane:EA→1:1 hexane:EA) and isolate the title compound (33.8 g, 57%) as a light green solid. LCMS (4 min=324.0, 326.0, M+1). In a round bottom flask combine Let cool to RT Filter concentrate in vacuo Purify by silica plug (hexane→4:1 hexane

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In a 1 L round bottom flask combine 4′-chloro-2′-fluoroacetophenone (40 g, 231.8 mmol), heptane (120 mL), and methanol (16 mL). Cool to 0° C. and place under nitrogen. Dissolve sulfuryl chloride (21.5 mL, 1.15 equiv.) in heptane (120 mL) and charge to an addition funnel Add drop-wise to the reaction over 60 min. Stir for 2.5 h at 0° C.; a white precipitate forms during this time. Charge the addition funnel with 1 M sodium bicarbonate (400 mL) then add to the reaction drop-wise. After all gas evolution stops, filter the biphasic suspension to collect the title compound (38.18 g, 80%) as white needles. 1H NMR (DMSO-d6) δ 5.00 (d, 2H, J=2.5 Hz), 7.43 (m, 1H), 7.63 (m, 1H), 7.89 (t, 1H, J=8.4 Hz). In a 1 L round bottom flask combine Add drop-wise to the reaction over 60 min then add to the reaction drop-wise filter the biphasic suspension to collect the title compound (38.18 g, 80%) as white needles

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

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

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

Procedure: Combine 2-chloro-1-(4-chloro-2-fluorophenyl)ethanone (1.5 kg, 5.44 mol), and (E)-N′-(6-chloropyridazin-3-yl)-N,N-dimethylacetimidamide (1.19 kg, 5.72 mol) in DMF (10.14 L) and heat at 120° C. for 5 h. After cooling, add water (30 L) and stir to crystallize the product. Collect the product by filtration and rinse the cake with water (2×12 L) and heptanes (2×10 L) then dry under vacuum to obtain title compound. (1.490 kg, 84.44%; mp=160° C., M+=324). After cooling to crystallize the product Collect the product by filtration rinse the cake with water (2×12 L) and heptanes (2×10 L) then dry under vacuum

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

Procedure: Stir a mixture of heptanes (1.5 L), methanol (0.4 L), and 1-(4-chloro-2-fluorophenyl)ethanone (1 kg, 5.81 mol) with cooling to <5° C. Add sulfuryl chloride (0.608 L, 1.02 kg, 7.55 mol) as a heptanes (1.5 L) solution drop-wise to the mixture keeping the reaction temperature <15° C. during the addition. After 2 h quench the reaction at ambient temperature to a pH of 6 with sodium hydroxide (5N, 2.0 L). Extract the reaction mixture with methylene chloride (2 L) and concentrate the extract to form a white solid. Filter and dry the solid. with cooling to <5° C the reaction temperature <15° C. during the addition After 2 h quench the reaction at ambient temperature to a pH of 6 with sodium hydroxide (5N, 2.0 L) Extract the reaction mixture with methylene chloride (2 L) concentrate the extract to form a white solid Filter dry the solid

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In a round bottom flask combine (E)-N′-(6-chloropyridazin-3-yl)-N,N-dimethylacetimidamide (36.61 g, 184.3 mmol), 2-chloro-1-(4-chloro-2-fluorophenyl)ethanone (38.15 g, 1 equiv.), and dimethylformamide (150 mL). Place under nitrogen then heat at 120° C. for 4 h. Let cool to RT and stir overnight. Dilute with EA (1 L) and water (500 mL). Extract organics three times with water followed by aqueous saturated sodium chloride aqueous. Dry organics over anhydrous magnesium sulfate. Filter and concentrate in vacuo. Purify by silica plug (hexane→4:1 hexane:EA→3:1 hexane:EA→2:1 hexane:EA→1:1 hexane:EA) and isolate the title compound (33.8 g, 57%) as a light green solid. LCMS (4 min=324.0, 326.0, M+1). In a round bottom flask combine Let cool to RT Filter concentrate in vacuo Purify by silica plug (hexane→4:1 hexane