1-(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:

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:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 1-(2-fluorophenyl)ethanone (20 g, 145 mmol) in tetrahydrofuran (250 ml) was treated under an inert atmosphere at room temperature with (R)-(+)-tert-butylsulfinamide (21.1 g, 174 mmol) followed by the addition of titanium(IV)ethoxide (66.1 g, 290 mmol). The solution was stirred at 50° C. for 15 hours. For the workup, the dark brown solution was cooled to room temperature, then poured into a saturated solution of ammonium chloride. After addition of ethyl acetate, the mixture was stirred vigorously for 15 minutes. After separation of the layers, the aqueous phase was extracted twice with ethyl acetate. The combined organic layers were washed twice with water, dried over sodium sulphate and evaporated at reduced pressure. Purification of the crude product by chromatography on silica gel using a 4:1-mixture of cyclohexane and ethyl acetate yielded the (R)-E-N(1-(2-fluorophenyl)ethylidene)-2-methylpropane-sulfinamide (25.9 g, 74% of theory) as a brown oil. MS (ISP): m/z=242.3 [M+H]+. For the workup, the dark brown solution was cooled to room temperature the mixture was stirred vigorously for 15 minutes After separation of the layers the aqueous phase was extracted twice with ethyl acetate The combined organic layers were washed twice with water dried over sodium sulphate evaporated at reduced pressure Purification of the crude product by chromatography on silica gel using a 4

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

Procedure: DIPEA (167 mg, 1.3 mmol) was added to a stirred solution of 5-(2-fluoro-phenyl)-isoxazole-3-carboxylic acid (76 mg, 0.37 mmol) in DMF (2 mL) (prepared by the method used for the synthesis of Intermediate 25, starting from 2′-fluoroacetophenone) followed by HOBt (52 mg, 0.38 mmol) and EDCI.HCl (74 mg, 0.39 mmol). After 2 minutes 2-amino-1-[4-(3-trifluoromethyl-phenoxy)-piperidin-1-yl]-ethanone hydrochloride (125 mg, 0.37 mmol) (prepared according to Step 1 and 5 of the General Scheme) was added to the reaction mixture and stirring was continued at ambient temperature overnight. The reaction mixture was diluted with cold water, extracted with ethyl acetate, dried over sodium sulfate and concentrated under reduced pressure. The residue was purified by washing with methanol to afford the 40 mg (34% Yield) of 5-(2-fluoro-phenyl)-isoxazole-3-carboxylic acid {2-oxo-2-[4-(3-trifluoromethyl-phenoxy)-piperidin-1-yl]-ethyl}-amide. LC/MS [M+H]+: 492, 92.84%. 1H NMR (300 MHz, DMSO-d6): δ8.8 (t, 1H), 8.0 (m, 1H), 7.6 (m, 1H), 7.4 (m, 3H), 7.25 (m, 3H), 7.2 (d, 1H), 4.8 (m, 1H), 4.2 (m, 2H), 3.7 (m, 2H), 3.4 (m, 2H), 1.9 (m, 2H), 1.6 (m, 2H). prepared by the method was added to the reaction mixture extracted with ethyl acetate dried over sodium sulfate concentrated under reduced pressure The residue was purified by washing with methanol

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

Procedure: DIPEA (167 mg, 1.3 mmol) was added to a stirred solution of 5-(2-fluoro-phenyl)-isoxazole-3-carboxylic acid (76 mg, 0.37 mmol) in DMF (2 mL) (prepared by the method used for the synthesis of Intermediate 25, starting from 2′-fluoroacetophenone) followed by HOBt (52 mg, 0.38 mmol) and EDCI.HCl (74 mg, 0.39 mmol). After 2 minutes 2-amino-1-[4-(3-trifluoromethyl-phenoxy)-piperidin-1-yl]-ethanone hydrochloride (125 mg, 0.37 mmol) (prepared according to Step 1 and 5 of the General Scheme) was added to the reaction mixture and stirring was continued at ambient temperature overnight. The reaction mixture was diluted with cold water, extracted with ethyl acetate, dried over sodium sulfate and concentrated under reduced pressure. The residue was purified by washing with methanol to afford the 40 mg (34% Yield) of 5-(2-fluoro-phenyl)-isoxazole-3-carboxylic acid {2-oxo-2-[4-(3-trifluoromethyl-phenoxy)-piperidin-1-yl]-ethyl}-amide. LC/MS [M+H]+: 492, 92.84%. 1H NMR (300 MHz, DMSO-d6): δ8.8 (t, 1H), 8.0 (m, 1H), 7.6 (m, 1H), 7.4 (m, 3H), 7.25 (m, 3H), 7.2 (d, 1H), 4.8 (m, 1H), 4.2 (m, 2H), 3.7 (m, 2H), 3.4 (m, 2H), 1.9 (m, 2H), 1.6 (m, 2H). prepared by the method was added to the reaction mixture extracted with ethyl acetate dried over sodium sulfate concentrated under reduced pressure The residue was purified by washing with methanol

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

Procedure: DIPEA (328 mg, 2.5 mmol) to a stirred solution of 5-(2-fluoro-phenyl)-1H-pyrazole-3-carboxylic acid (150 mg, 0.724 mmol) (prepared by the method used for the synthesis of Intermediate 29, starting from 2′fluoroacetophenone) in DMF (5 mL) followed by HOBt (100 mg, 0.76 mmol) and EDCI.HCl (140 mg, 0.76 mmol). After 2 minutes 2-amino-1-[4-(2-chloro-phenylamino)-piperidin-1-yl]-ethanone dihydrochloride (220 mg, 0.724 mmol) was added to the reaction mixture and stirring was continued at ambient temperature overnight. The reaction mixture was diluted with cold water, the precipitate was collected. The solid was purified by recrystallisation from ethyl acetate The residue obtained was again purified by column chromatography (using 60-120 silica gel and 60% EtOAc in hexane as eluent) to afford 88 mg (26.6% Yield) of 5-(2-fluoro-phenyl)-isoxazole-3-carboxylic acid {2-[4-(2-chloro-phenylamino)-piperidin-1-yl]-2-oxo-ethyl}-amide. LC/MS [M+H]+: 457, 91.47%. 1H NMR (300 MHz, DMSO-d6): δ8.75 (t, 1H), 8.0 (m, 1H), 7.6 (m, 1H), 7.38 (m, 2H), 7.1 (m, 3H), 6.82 (d, 1H), 6.6 (m, 1H), 4.8 (m, 1H), 4.3 (d, 1H), 4.1 (d, 2H), 3.8 (d, 1H), 3.6 (m, 1H), 3.1 (t, 1H), 2.8 (t, 1H), 1.9 (t, 2H), 1.45 (m, 2H). the precipitate was collected The solid was purified by recrystallisation from ethyl acetate The residue obtained was again purified by column chromatography (using 60-120 silica gel and 60% EtOAc in hexane as eluent)

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

Procedure: DIPEA (328 mg, 2.5 mmol) to a stirred solution of 5-(2-fluoro-phenyl)-1H-pyrazole-3-carboxylic acid (150 mg, 0.724 mmol) (prepared by the method used for the synthesis of Intermediate 29, starting from 2′fluoroacetophenone) in DMF (5 mL) followed by HOBt (100 mg, 0.76 mmol) and EDCI.HCl (140 mg, 0.76 mmol). After 2 minutes 2-amino-1-[4-(2-chloro-phenylamino)-piperidin-1-yl]-ethanone dihydrochloride (220 mg, 0.724 mmol) was added to the reaction mixture and stirring was continued at ambient temperature overnight. The reaction mixture was diluted with cold water, the precipitate was collected. The solid was purified by recrystallisation from ethyl acetate The residue obtained was again purified by column chromatography (using 60-120 silica gel and 60% EtOAc in hexane as eluent) to afford 88 mg (26.6% Yield) of 5-(2-fluoro-phenyl)-isoxazole-3-carboxylic acid {2-[4-(2-chloro-phenylamino)-piperidin-1-yl]-2-oxo-ethyl}-amide. LC/MS [M+H]+: 457, 91.47%. 1H NMR (300 MHz, DMSO-d6): δ8.75 (t, 1H), 8.0 (m, 1H), 7.6 (m, 1H), 7.38 (m, 2H), 7.1 (m, 3H), 6.82 (d, 1H), 6.6 (m, 1H), 4.8 (m, 1H), 4.3 (d, 1H), 4.1 (d, 2H), 3.8 (d, 1H), 3.6 (m, 1H), 3.1 (t, 1H), 2.8 (t, 1H), 1.9 (t, 2H), 1.45 (m, 2H). the precipitate was collected The solid was purified by recrystallisation from ethyl acetate The residue obtained was again purified by column chromatography (using 60-120 silica gel and 60% EtOAc in hexane as eluent)

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

Procedure: DIPEA (160 mg, 1.3 mmol) was added to a stirred solution of 5-(2-Fluoro-phenyl)-1H-pyrazole-3-carboxylic acid (77 mg, 0.37 mmol) (prepared by the method used for the synthesis of Intermediate 29, starting from 2′-fluoroacetophenone) in DMF (2 mL) followed by HOBt (52 mg, 0.39 mmol) and EDCI.HCl (74 mg, 0.39 mmol). After 2 minutes 2-amino-1-[4-(3-trifluoromethyl-phenoxy)-piperidin-1-yl]-ethanone hydrochloride (prepared according to Step 1 and 5 of the General Scheme) (125 mg, 0.37 mmol) was added to the reaction mixture and stirring was continued at ambient temperature overnight. The reaction mixture was diluted with cold water, extracted with ethyl acetate and dried over sodium sulfate. The organic layer was concentrated under reduced pressure to afford the residue. Washing with ethyl acetate afforded 57 mg (31.67% Yield) of 5-(2-fluoro-phenyl)-1H-pyrazole-3-carboxylic acid {2-oxo-2-[4-(3-trifluoromethyl-phenoxy)-piperidin-1-yl]-ethyl}-amide. LC/MS [M+H]+: 491, 93.63%. 1H NMR (300 MHz, DMSO-d6): δ13.8 (d, 1H), 8.7 (m, 1H), 7.8 (m, 1H), 7.2 (m, 6H), 6.9 (m, 2H), 4.8 (m, 1H), 4.2 (d, 2H), 3.7 (m, 2H), 3.4 (m, 2H), 1.9 (m, 2H), 1.6 (m, 2H). prepared by the method was added to the reaction mixture extracted with ethyl acetate dried over sodium sulfate The organic layer was concentrated under reduced pressure to afford the residue Washing with ethyl acetate