3-(chloromethyl)benzonitrile

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

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 title compound was prepared following the example in preparation 68 using potassium carbonate (1.50 g), (2,6-dibromo-3-nitro-pyridin-4-yl)-carbamic acid ethyl ester (2.0 g) in acetone (40 ml), 3-chloromethyl-benzonitrile (0.82 g) and sodium iodide (0.98 g). This gave the product (2.62 g) as a yellow oil.

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

Procedure: The title compound was prepared following the example in preparation 68 using potassium carbonate (1.50 g), (2,6-dibromo-3-nitro-pyridin-4-yl)-carbamic acid ethyl ester (2.0 g) in acetone (40 ml), 3-chloromethyl-benzonitrile (0.82 g) and sodium iodide (0.98 g). This gave the product (2.62 g) as a yellow oil.

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

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: Finely ground potassium hydroxide (6.59 g, 118 mmol, 2.5 equiv.) was treated with DMSO (100 mL). To this was added 5-fluoro-4-(methyloxy)-1H-indazol-3-amine (for a preparations see Intermediate 56) (8.5 g, 47 mmol) and the mixture stirred at room temperature for 50 minutes. To the red coloured mixture was added 3-chloromethyl benzonitrile (8.9 g, 59 mmol, 1.25 equiv.) in one portion. A small exotherm of −5° C. was observed. The mixture was allowed to stir at room temperature for 25 minutes before pouring into water (600 mL) and extracting with chloroform (400 mL). The aqueous was re-extracted with chloroform (2×400 mL). The organic extracts were combined, washed with water (3×500 mL), dried over MgSO4, filtered and evaporated to give the crude product. This was dry loaded onto silica and chromatographed eluting with 20% petrol up to 70% EtOAc-petrol. The material came off impure so was re-chromatographed on a suction column. The impure material was loaded in DCM and eluted with DCM up to 30% EtOAc-DCM to give the title compound (8.25 g, 48%) as an off-white solid. LCMS (System A) RT=0.96 min, ES+ve m/z 297 (M+H)+. A small exotherm of −5° C. to stir at room temperature for 25 minutes extracting with chloroform (400 mL) The aqueous was re-extracted with chloroform (2×400 mL) washed with water (3×500 mL) dried over MgSO4 filtered evaporated to give the crude product This was dry chromatographed eluting with 20% petrol up to 70% EtOAc-petrol so was re-chromatographed on a suction column eluted with DCM up to 30% EtOAc-DCM

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

Procedure: Potassium hydroxide (85% pure, 0.84 g, 12.7 mmol) was powdered and added to DMSO (25 mL) and the mixture was stirred for 5 min. A solution of 1:1 mixture of 6-fluoro-4-(methyloxy)-1H-indazol-3-amine and 4-fluoro-6-(methyloxy) regioisomer) (1.085 g, 6 mmol) in DMSO (5 mL) was added and the mixture was stirred for 5 min. The colour of the reaction mixture turned to dark red. Solid 3-(chloromethyl)benzonitrile (1.0 g, 7.1 mmol) was added and the mixture stirred for 1 h. The mixture was diluted with water, treated with 2M HCl (3 mL) and extracted with ethyl acetate. The organic solution was washed with water (4 times) and once with brine, dried (MgSO4) and evaporated. The residue was dissolved in DCM and MeOH and pre-absorbed on florisil (5 g). The pre-absorbed compound was placed on two 100 g Silica cartridges and purified by chromatography on Flashmaster using a 0-100% ethyl acetate-cyclohexane over 60 min. The appropriate fractions (RT=48 min) were evaporated under reduced pressure to give impure title compound as an orange solid. This required further purification and was pre-absorbed on florisil and purified by chromatography on Flashmaster silica 100 g using a 0-100% ethyl acetate-cyclohexane over 100 min. The appropriate fractions (RT=46-70 min) were combined and evaporated in vacuo to give the title compound (362 mg, 20%) as a yellow solid: LCMS (System A) RT=0.96 min, ES+ve m/z 297 (M+H)+, NMR δ (CDCl3) 7.57-7.53 (1H, m), 7.43-7.38 (3H, m), 6.37 (1H, dd, J 10, 2 Hz), 6.15 (1H, dd, J 12, 2 Hz), 5.23 (2H, s), 4.45 (2H, br), 3.94 (3H, s). was added the mixture was stirred for 5 min the mixture stirred for 1 h extracted with ethyl acetate The organic solution was washed with water (4 times) and once with brine dried (MgSO4) evaporated The residue was dissolved in DCM MeOH and pre-absorbed on florisil (5 g) purified by chromatography on Flashmaster over 60 min The appropriate fractions (RT=48 min) were evaporated under reduced pressure

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

Procedure: To a fine suspension of ground potassium hydroxide (566 mg, 10.09 mmol) in dimethyl sulfoxide (5 mL) at room temperature under nitrogen was added a solution of 7-fluoro-4-(methyloxy)-1H-indazol-3-amine (for a preparation see Intermediate 43) (727 mg, 4.01 mmol) in dimethyl sulfoxide (2 mL). After 5 min the resulting dark brown solution was treated with 3-(chloromethyl)benzonitrile (730 mg, 4.82 mmol). The reaction mixture was stirred for 30 min and then the mixture was poured into water, forming an emulsion. This was extracted with DCM and the combined extracts were washed with water and passed through a hydrophobic frit. The aqueous was extracted with ethyl acetate and the combined organic solutions were washed with water and brine, dried (Na2SO4) and then combined with the initial DCM extracts and concentrated in vacuo to leave a brown oil. The residue was loaded in dichloromethane to a silica 100 g cartridge and purified by chromatography on Flashmaster eluting with 0-100% ethyl acetate-cyclohexane over 40 min. The appropriate fractions were combined and evaporated in vacuo to give the required product (665 mg, 56%) as a yellow powder. LCMS (System A) RT=1.02 min, ES+ve m/z 297 (M+H)+. forming an emulsion This was extracted with DCM the combined extracts were washed with water The aqueous was extracted with ethyl acetate the combined organic solutions were washed with water and brine dried (Na2SO4) concentrated in vacuo to leave a brown oil purified by chromatography on Flashmaster eluting with 0-100% ethyl acetate-cyclohexane over 40 min evaporated in vacuo

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

Procedure: To a solution of ground potassium hydroxide (6.75 g, 120 mmol) in DMSO (300 mL) at room temperature under nitrogen was added 4-(methyloxy)-1H-indazol-3-amine (for a preparation see Intermediate 1) (7.85 g, 48.1 mmol), and this gave a deep red solution. After 5 minutes 3-(chloromethyl)benzonitrile (8.84 g, 58.3 mmol) was added in one portion. The reaction mixture was stirred for 20 minutes and then poured into water (500 mL), forming an emulsion. This was extracted using chloroform (3×500 mL). The combined organic solutions were washed with water (400 mL) and passed through a hydrophobic frit. The solvent was removed in vacuo, the residue was applied to a 340 g silica cartridge, and eluted with a gradient of 0-100% ethyl acetate in cyclohexane over 8CV. This gave an orange solid which was treated with ethyl acetate (10 mL) and cyclohexane (90 mL). The solid was collected by filtration and washed with cyclohexane (50 mL). The solid was dried in vacuo to give the title compound (7.89 g, 59%) as a pale orange solid. LCMS (System A) RT=0.93 min, ES+ve m/z 279 (M+H)+. this gave a deep red solution forming an emulsion This was extracted The combined organic solutions were washed with water (400 mL) The solvent was removed in vacuo eluted with a gradient of 0-100% ethyl acetate in cyclohexane over 8CV This gave an orange solid which The solid was collected by filtration washed with cyclohexane (50 mL) The solid was dried in vacuo