3-bromo-1,1,1-trifluorobutan-2-one

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

Procedure: A solution of 6-chloro-3-aminopyridazine x34 (3.16 g, 1 eq, 24.2 mmol) and 3-bromo-1,1,1-trifluorobutan-2-one (5 g, 1 eq, 24.4 mmol) in 1,2-dimethoxyethane (100 ml) is refluxed during 17 hours. After cooling to room temperature and filtration, the solvent is removed under reduced pressure and the crude mixture is purified by preparative chromatography on silicagel (CH2Cl2/MeOH/NH4OH: 98/2/0.2 (v/v/v)) leading to 6-chloro-3-methyl-2-(trifluoromethyl)imidazo[1,2-b]pyridazine x35. filtration the solvent is removed under reduced pressure the crude mixture is purified by preparative chromatography on silicagel (CH2Cl2/MeOH/NH4OH: 98/2/0.2 (v/v/v))

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

Procedure: A solution of 6-chloro-3-aminopyridazine x34 (3.16 g, 1 eq, 24.2 mmol) and 3-bromo-1,1,1-trifluorobutan-2-one (5 g, 1 eq, 24.4 mmol) in 1,2-dimethoxyethane (100 ml) is refluxed during 17 hours. After cooling to room temperature and filtration, the solvent is removed under reduced pressure and the crude mixture is purified by preparative chromatography on silicagel (CH2Cl2/MeOH/NH4OH: 98/2/0.2 (v/v/v)) leading to 6-chloro-3-methyl-2-(trifluoromethyl)imidazo[1,2-b]pyridazine x35. filtration the solvent is removed under reduced pressure the crude mixture is purified by preparative chromatography on silicagel (CH2Cl2/MeOH/NH4OH: 98/2/0.2 (v/v/v))

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

Procedure: A solution of 6-chloro-3-aminopyridazine x34 (3.16 g, 1 eq, 24.2 mmol) and 3-bromo-1,1,1-trifluorobutan-2-one (5 g, 1 eq, 24.4 mmol) in 1,2-dimethoxyethane (100 ml) is refluxed during 17 hours. After cooling to room temperature and filtration, the solvent is removed under reduced pressure and the crude mixture is purified by preparative chromatography on silicagel (CH2Cl2/MeOH/NH4OH: 98/2/0.2 (v/v/v)) leading to 6-chloro-3-methyl-2-(trifluoromethyl)imidazo[1,2-b]pyridazine x35. filtration the solvent is removed under reduced pressure the crude mixture is purified by preparative chromatography on silicagel (CH2Cl2/MeOH/NH4OH: 98/2/0.2 (v/v/v))

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

Procedure: A solution of 6-chloro-3-aminopyridazine x34 (3.16 g, 1 eq, 24.2 mmol) and 3-bromo-1,1,1-trifluorobutan-2-one (5 g, 1 eq, 24.4 mmol) in 1,2-dimethoxyethane (100 ml) is refluxed during 17 hours. After cooling to room temperature and filtration, the solvent is removed under reduced pressure and the crude mixture is purified by preparative chromatography on silicagel (CH2Cl2/MeOH/NH4OH: 98/2/0.2 (v/v/v)) leading to 6-chloro-3-methyl-2-(trifluoromethyl)imidazo[1,2-b]pyridazine x35. filtration the solvent is removed under reduced pressure the crude mixture is purified by preparative chromatography on silicagel (CH2Cl2/MeOH/NH4OH: 98/2/0.2 (v/v/v))

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

Procedure: Prepared in analogy to example 49 (a) from 1-piperazinecarbothioamide and 3-bromo-1,1,1-trifluoro-2-butanone. The crude material was purified by chromatography (SiO2, methanol/dichloromethane) to yield the title compound as a white crystalline solid (yield 25%). MS (m/e): 252.1 (M+H+, 100%). The crude material was purified by chromatography (SiO2, methanol/dichloromethane)