4-chloro-2,5-difluorobenzonitrile

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

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

Procedure: The product of step (b) (0.24 g, 0.9 mmol) was dissolved in dry dimethylformamide (20 ml), sodium hydride (60% dispersion in oil, 0.04 g, 0.95 mmol) was added in one portion and the mixture stirred at room temperature for 0.5 h. 4-Chloro-2,5-difluorobenzonitrile (0.16 g, 0.9 mmol), as a solution in dry dimethylformamide (5 ml), was added dropwise and the reaction stirred for 18hat room temperature. Water (25 ml) was added and the reaction mixture extracted with ethyl acetate (3×60 ml). The combined organic extracts were washed with water (2×20 ml), dried (magnesium sulphate) and evaporated. The residue was eluted down a flash chromatography column using hexane:ethyl acetate (1:3) as eluent to give the sub-title compound as a white crystalline solid (0.34 g, 88%). the reaction stirred for 18hat room temperature the reaction mixture extracted with ethyl acetate (3×60 ml) The combined organic extracts were washed with water (2×20 ml) dried (magnesium sulphate) evaporated The residue was eluted down a flash chromatography column

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: The product of step (b) (0.24 g, 0.9 mmol) was dissolved in dry dimethylformamide (20 ml), sodium hydride (60% dispersion in oil, 0.04 g, 0.95 mmol) was added in one portion and the mixture stirred at room temperature for 0.5 h. 4-Chloro-2,5-difluorobenzonitrile (0.16 g, 0.9 mmol), as a solution in dry dimethylformamide (5 ml), was added dropwise and the reaction stirred for 18hat room temperature. Water (25 ml) was added and the reaction mixture extracted with ethyl acetate (3×60 ml). The combined organic extracts were washed with water (2×20 ml), dried (magnesium sulphate) and evaporated. The residue was eluted down a flash chromatography column using hexane:ethyl acetate (1:3) as eluent to give the sub-title compound as a white crystalline solid (0.34 g, 88%). the reaction stirred for 18hat room temperature the reaction mixture extracted with ethyl acetate (3×60 ml) The combined organic extracts were washed with water (2×20 ml) dried (magnesium sulphate) evaporated The residue was eluted down a flash chromatography column

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

Procedure: The subtitle compound was prepared according to the method of Example 3 step (b) using (3-cyclopentyl-3-hydroxypropyl)methylcarbamic acid, 1,1-dimethylethyl ester and 4-chloro-2,5-difluorobenzonitrile in N,N-dimethylformamide.

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

Procedure: The subtitle compound was prepared according to the method of Example 3 step (b) using (3-hydroxy-4-pentenyl)methylcarbamic acid, 1,1-dimethylethyl ester and 4-chloro-2,5-difluorobenzonitrile in N,N-dimethylformamide.

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

Procedure: The subtitle compound was prepared according to the method of Example 3 step (b) using methyl-(4,4,4-trifluoro-3-hydroxybutyl)carbamic acid, 1,1-dimethylethyl ester and 4-chloro-2,5-difluorobenzonitrile in N,N-dimethylformamide.

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

Procedure: The subtitle compound was prepared according to the method of Example 3 step (b) using (3-hydroxyhexyl)methylcarbamic acid, 1,1-dimethylethyl ester and 4-chloro-2,5-difluorobenzonitrile in N,N-dimethylformamide.

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

Procedure: The subtitle compound was prepared according to the method of Example 3 step (b) using (3-hydroxypentyl)methylcarbamic acid, 1,1-dimethylethyl ester and 4-chloro-2,5-difluorobenzonitrile in N,N-dimethylformamide.

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

Procedure: The product from step (a) (0.1 g) and 2,5-difluoro-4-chloro-benzonitrile (0.18 g) and sodium hydride (60% dispersion in oil, 0.035 g) were subjected to the procedure described in Example 90(a) to afford the product as a gum (0.15 g).

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

Procedure: Using the product of step (d) (322 mg, 1.84 mmol), 4-chloro-2,5-difluorobenzonitrile (320 mg, 1.84 mmol) and the procedure described in Example 72(c), the title compound was prepared (540 mg, 89%).