3,4-dichloro-2-fluoroaniline

Conditions: temp:95.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 1.5 g (8.33 mmol) 3.4-dichloro-2-fluoroaniline and 1.64 g (10.00 mmol) potassium ethylxanthogenate in 8 mL dry N,N-dimethylformamide was heated in a 95° C. oil bath for 5 h. The reaction mixture was cooled to room temperature and diluted with water (25 mL). The mixture was acidified with aqueous HCl 2N. The precipitate was collected by filtration, washed with water and dried to provide 1.8 g (92%) of the title compound as a white solid. MS(m/e): 233.8 (M−H+). The reaction mixture was cooled to room temperature The precipitate was collected by filtration washed with water dried

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

Procedure: Starting material: N4-(3,4-dichloro-2-fluorophenyl)-7-methoxyquinazoline-4,6-diamine was prepared according to the same method of preparation of N4-(3-chloro-4-fluorophenyl)-7-(2-methoxy)ethoxyquinazoline-4,6-diamine in WO2008/33747, but the starting materials were 4-chloro-7-methoxy-6-nitro-quinazoline and 3,4-dichloro-2-fluoro-aniline; other starting materials were prepared as example 1. other starting materials were prepared as example 1

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

Procedure: Starting material: N4-(3,4-dichloro-2-fluorophenyl)-7-methoxyquinazoline-4,6-diamine was prepared according to the same method of preparation of N4-(3-chloro-4-fluorophenyl)-7-(2-methoxy)ethoxyquinazoline-4,6-diamine in WO2008/33747, but the starting materials were 4-chloro-7-methoxy-6-nitro-quinazoline and 3,4-dichloro-2-fluoro-aniline; other starting materials were prepared as example 1. other starting materials were prepared as example 1

Conditions: temp:95.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 1.5 g (8.33 mmol) 3.4-dichloro-2-fluoroaniline and 1.64 g (10.00 mmol) potassium ethylxanthogenate in 8 mL dry N,N-dimethylformamide was heated in a 95° C. oil bath for 5 h. The reaction mixture was cooled to room temperature and diluted with water (25 mL). The mixture was acidified with aqueous HCl 2N. The precipitate was collected by filtration, washed with water and dried to provide 1.8 g (92%) of the title compound as a white solid. MS(m/e): 233.8 (M−H+). The reaction mixture was cooled to room temperature The precipitate was collected by filtration washed with water dried