4-(bromomethyl)-2-fluoro-1-(trifluoromethyl)benzene

Conditions: temp:40.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of [(3RS,4SR)-1-benzyl-4-(3-chloro-phenyl)-pyrrolidin-3-yl]-methyl-amine (2.20 g, 7.31 mmol) in THF (70 ml) was added 4-bromomethyl-2-fluoro-1-trifluoromethyl-benzene (2.25 g, 8.75 mmol) and Et3N (1.21 ml, 8.75 mmol). The reaction mixture was stirred overnight at 40° C., concentrated under vacuo, diluted with EtOAc, washed with H2O. The organic phase was dried over Na2SO4 and the product purified by flash chromatography (SiO2, EtOAc/Heptane 1:3) to afford 2.0 g (57%) of the title compound as a colorless oil. concentrated under vacuo diluted with EtOAc washed with H2O The organic phase was dried over Na2SO4 the product purified by flash chromatography (SiO2, EtOAc/Heptane 1:3)

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

Procedure: To a solution of compound 10-G (0.023 g, 0.048 mmol) in DMF (1 mL) was added Na2CO3 (0.015 g, 0.14 mmol) and 3-fluoro-4-trifluoromethylbenzyl bromide (0.014 g, 0.053 mmol). The reaction mixture was stirred at room temperature overnight. The reaction mixture was diluted with ethyl acetate, washed with water, and dried over sodium sulfate. The solvent was evaporated in vacuo and the residue was purified by flash column chromatography, eluting with a hexanes-EtOAc gradient to give Compound 100 as a yellow solid (0.017 g, 66%); MS m/z (M+H+) 532. washed with water dried over sodium sulfate The solvent was evaporated in vacuo the residue was purified by flash column chromatography eluting with a hexanes-EtOAc gradient

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

Procedure: To a solution of compound 9-E (0.015 g, 0.025 mmol) in DMF (2.0 mL) was added Na2CO3 (0.011 g, 0.099 mmol) and 3-fluoro-4-trifluoromethylbenzyl bromide (0.006 g, 0.025 mmol). The reaction mixture was stirred at room temperature overnight. The solvent was evaporated in vacuo and the residue was purified by flash column chromatography (SiO2) eluting with a gradient of 0-100% ethyl acetate in hexane to afford Compound 60 (0.008 g, 58%); MS m/z (M+H+) 552. The solvent was evaporated in vacuo the residue was purified by flash column chromatography (SiO2) eluting with a gradient of 0-100% ethyl acetate in hexane

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

Procedure: A flask containing tetrahydrofuran (2.0 mL) was charged with sodium amide (152 mg, 3.69 mmol; Aldrich) and chilled to 0° C. (4-Fluorophenyl)hydrazine hydrochloride (400 mg, 3.17 mmol; Aldrich) was added in portions. After 5 minutes, the solid had completely dissolved and the ice bath was removed. Stirring was continued for 1 hour, then the solution was chilled again in an ice bath and 4-(bromomethyl)-2-fluoro-1-(trifluoromethyl)benzene (598 mg, 2.33 mmol; Alfa Aesar) was added dropwise. After 30 minutes, the ice bath was removed and the reaction was heated to 50° C. overnight. The mixture was diluted with water (5 mL) and extracted with dichloromethane (2×10 mL). The combined organic extracts were dried over magnesium sulfate, filtered, and concentrated in vacuo to afford the title product which was carried on without further purification: LC/MS (DCI/NH3) m/z 250 (M+H−NH3)+. was added in portions the solid had completely dissolved the ice bath was removed was continued for 1 hour the solution was chilled again in an ice bath After 30 minutes the ice bath was removed The mixture was diluted with water (5 mL) extracted with dichloromethane (2×10 mL) The combined organic extracts were dried over magnesium sulfate filtered concentrated in vacuo

Conditions: temp:40.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of [(3RS,4SR)-1-benzyl-4-(3-chloro-phenyl)-pyrrolidin-3-yl]-methyl-amine (2.20 g, 7.31 mmol) in THF (70 ml) was added 4-bromomethyl-2-fluoro-1-trifluoromethyl-benzene (2.25 g, 8.75 mmol) and Et3N (1.21 ml, 8.75 mmol). The reaction mixture was stirred overnight at 40° C., concentrated under vacuo, diluted with EtOAc, washed with H2O. The organic phase was dried over Na2SO4 and the product purified by flash chromatography (SiO2, EtOAc/Heptane 1:3) to afford 2.0 g (57%) of the title compound as a colorless oil. concentrated under vacuo diluted with EtOAc washed with H2O The organic phase was dried over Na2SO4 the product purified by flash chromatography (SiO2, EtOAc/Heptane 1:3)

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In a dried flask was zinc powder (3.05 g, 46.69 mmol) suspended in anhydrous tetrahydrofuran (25 mL) under nitrogen. The resulting suspension was warmed to 60° C., then 1,2-dibromoethane (0.168 mL, 1.95 mmol) was added and stirred at that temperature for 15 min. It was cooled to room temperature, then chlorotrimethylsilane (0.2 mL, 1.58 mmol) was added and stirred at room temperature for 1 h 15 min. Then, 4-(bromomethyl)-2-fluoro-1-(trifluoromethyl)benzene (10 g, 38.91 mmol) in tetrahydrofuran (5 mL) was added in 6 equal portions every 10 minutes under ice-cooling. After complete addition the ice-bath was removed and the reaction mixture stirred at room temperature for 18 h. Then was stirring switched off to let the solids settle. The supernatant was used in next transformation. In a dried flask was It was cooled to room temperature stirred at room temperature for 1 h 15 min cooling was removed the reaction mixture stirred at room temperature for 18 h Then was stirring

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

Procedure: To a solution of compound 10-G (0.023 g, 0.048 mmol) in DMF (1 mL) was added Na2CO3 (0.015 g, 0.14 mmol) and 3-fluoro-4-trifluoromethylbenzyl bromide (0.014 g, 0.053 mmol). The reaction mixture was stirred at room temperature overnight. The reaction mixture was diluted with ethyl acetate, washed with water, and dried over sodium sulfate. The solvent was evaporated in vacuo and the residue was purified by flash column chromatography, eluting with a hexanes-EtOAc gradient to give Compound 100 as a yellow solid (0.017 g, 66%); MS m/z (M+H+) 532. washed with water dried over sodium sulfate The solvent was evaporated in vacuo the residue was purified by flash column chromatography eluting with a hexanes-EtOAc gradient

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

Procedure: To a solution of compound 9-E (0.015 g, 0.025 mmol) in DMF (2.0 mL) was added Na2CO3 (0.011 g, 0.099 mmol) and 3-fluoro-4-trifluoromethylbenzyl bromide (0.006 g, 0.025 mmol). The reaction mixture was stirred at room temperature overnight. The solvent was evaporated in vacuo and the residue was purified by flash column chromatography (SiO2) eluting with a gradient of 0-100% ethyl acetate in hexane to afford Compound 60 (0.008 g, 58%); MS m/z (M+H+) 552. The solvent was evaporated in vacuo the residue was purified by flash column chromatography (SiO2) eluting with a gradient of 0-100% ethyl acetate in hexane

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

Procedure: The title compound, m/e=463.5 ([M−H]−), was produced in analogy with intermediate 1, steps 1 to 4. Thus, 1,8-octanediol was alkylated in step 1 with 3-fluoro-4-trifluoromethyl-benzyl bromide, leading to 8-(3-fluoro-4-trifluoromethyl-benzyloxy)-octan-1-ol, which was oxidized in step 2 to 8-(3-fluoro-4-trifluoromethyl-benzyloxy)-octanoic acid. This was coupled in step 3 with (R)-3-amino-4-dimethylamino-butyric acid benzyl ester dihydrochloride to produce (R)-3-[8-(3-fluoro-4-trifluoromethyl-benzyloxy)-octanoylamino]-4-dimethylamino-butyric acid benzyl ester, which was hydrogenated in step 4.

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

Procedure: The title compound, m/e=463.5 ([M−H]−), was produced in analogy with example 1, steps 1 to 4. Thus, 1,8-octanediol was alkylated in step 1 with 3-fluoro-4-trifluoromethyl-benzyl bromide, leading to 8-(3-fluoro-4-trifluoromethyl-benzyloxy)-octan-1-ol, which was oxidized in step 2 to 8-(3-fluoro-4-trifluoromethyl-benzyloxy)-octanoic acid. This was coupled in step 3 with (R)-3-amino-4-dimethylamino-butyric acid benzyl ester dihydrochloride to produce (R)-3-[8-(3-fluoro-4-trifluoromethyl-benzyloxy)-octanoylamino]-4-dimethylamino-butyric acid benzyl ester, which was hydrogenated in step 4.

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

Procedure: To a solution of ethyl 3-(4-fluorophenyl)-3-oxopropionate (8.9 g, 42.3 mmol) in 1,2-dimethoxyethane (50 ml) was added sodium hydride (60% in oil, 1.69 g, 42.3 mmol) under ice-cooling and the mixture was stirred at room temperature for 30 min. To the reaction solution was dropwise added a solution of 3-fluoro-4-(trifluoromethyl)benzyl bromide (9.0 g, 42.3 mmol) in 1,2-dimethoxyethane (50 ml) and the reaction solution was stirred at room temperature for 3 hrs. The reaction solution was poured into water (200 ml) and extracted with ethyl acetate (200 ml×2). The extract was washed with water and saturated brine, dried over anhydrous magnesium sulfate and evaporated under reduced pressure. The residue was purified by silica gel column chromatography (toluene:hexane=1:1-toluene) and recrystallized from diisopropyl ether-hexane to give ethyl 3-(4-fluorophenyl)-2-((3-fluoro-4-(trifluoromethyl)phenyl)methyl)-3-oxopropionate (10.8 g, 66%). cooling the reaction solution was stirred at room temperature for 3 hrs extracted with ethyl acetate (200 ml×2) The extract was washed with water and saturated brine dried over anhydrous magnesium sulfate evaporated under reduced pressure The residue was purified by silica gel column chromatography (toluene:hexane=1:1-toluene) recrystallized from diisopropyl ether-hexane

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

Procedure: The title compound, m/e=463.5 ([M−H]−), was produced in analogy with intermediate 1, steps 1 to 4. Thus, 1,8-octanediol was alkylated in step 1 with 3-fluoro-4-trifluoromethyl-benzyl bromide, leading to 8-(3-fluoro-4-trifluoromethyl-benzyloxy)-octan-1-ol, which was oxidized in step 2 to 8-(3-fluoro-4-trifluoromethyl-benzyloxy)-octanoic acid. This was coupled in step 3 with (R)-3-amino-4-dimethylamino-butyric acid benzyl ester dihydrochloride to produce (R)-3-[8-(3-fluoro-4-trifluoromethyl-benzyloxy)-octanoylamino]-4-dimethylamino-butyric acid benzyl ester, which was hydrogenated in step 4.