tribromo(dimethylsulfonio)boranuide

Conditions: temp:90.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a 100 mL round-bottomed flask equipped with a reflux condenser was added 2-(4-fluorophenyl)-5-(2-methoxy-5-(1-(pyridin-2-yl)cyclopropylcarbamoyl)phenyl)-N-methylbenzofuran-3-carboxamide (400 mg, 0.747 mmol), DCE (42 mL) and boron tribromide-methyl sulfide complex (1868 mg, 5.97 mmol). The solution was placed under nitrogen and stirred overnight at 90° C. The reaction mixture was cooled to room temperature, quenched with methanol and evaporated to near dryness. The mixture was taken up in 10 mL of methanol and purified using a Shimadzu preparative HPLC employing methanol/water/0.1% trifluoroacetic acid where solvent A was 10% methanol/90% water/0.1% trifluoroacetic acid and solvent B was 10% water/90% methanol/0.1% trifluoroacetic acid with a Phenomenex-Luna 10 μm C18 30×100 mm column at a gradient of 40-100% B and a flow rate of 40 mL/min. over 10 minutes with a 5 minute hold. The solvent was evaporated giving 234 mgs (60% yield) of 2-(4-fluorophenyl)-5-(2-hydroxy-5-(1-(pyridin-2-yl)cyclopropylcarbamoyl)phenyl)-N-methylbenzofuran-3-carboxamide as a white solid. The LC/MS data was obtained on a Shimadzu analytical LC/Micromass Platform LC (ESI+) at 220 nm using the following set of conditions: Sunfire 5 μm C18, 4.6×50 mm column, with a gradient of 0-100% B (B=90% HPLC grade methanol/0.1% trifluoroacetic acid/10% HPLC grade water), (A=90% HPLC grade water/0.1% trifluoroacetic acid/10% HPLC grade methanol), in 4 minutes with a 1 minute hold at a rate of 4 mL/minute. 1H NMR (400 MHz, THF-d8) δ ppm 1.25-1.31 (m, 2 H), 1.59-1.66 (m, 2 H), 2.90 (d, J=4.52 Hz, 3 H), 6.91 (d, J=8.53 Hz, 1 H), 7.08 (dd, J=6.90, 5.40 Hz, 1 H), 7.17-7.24 (m, 2 H), 7.45-7.65 (m, 5 H), 7.79 (dd, J=8.41, 2.13 Hz, 1 H), 7.88 (d, J=1.25 Hz, 1 H), 7.93 (d, J=2.01 Hz, 1 H), 8.08-8.17 (m, 2 H), 8.39-8.45 (m, 1 H), 8.49 (br. s., 2 H). LCMS Rt=1.495 min., m/z 522.33 (M+H), 94% purity. To a 100 mL round-bottomed flask equipped with a reflux condenser The reaction mixture was cooled to room temperature quenched with methanol evaporated purified a flow rate of 40 mL/min. over 10 minutes with a 5 minute hold The solvent was evaporated

Conditions: temp:90.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a 100 mL round-bottomed flask equipped with a reflux condenser was added 2-(4-fluorophenyl)-5-(2-methoxy-5-(1-(pyridin-2-yl)cyclopropylcarbamoyl)phenyl)-N-methylbenzofuran-3-carboxamide (400 mg, 0.747 mmol), DCE (42 mL) and boron tribromide-methyl sulfide complex (1868 mg, 5.97 mmol). The solution was placed under nitrogen and stirred overnight at 90° C. The reaction mixture was cooled to room temperature, quenched with methanol and evaporated to near dryness. The mixture was taken up in 10 mL of methanol and purified using a Shimadzu preparative HPLC employing methanol/water/0.1% trifluoroacetic acid where solvent A was 10% methanol/90% water/0.1% trifluoroacetic acid and solvent B was 10% water/90% methanol/0.1% trifluoroacetic acid with a Phenomenex-Luna 10 μm C18 30×100 mm column at a gradient of 40-100% B and a flow rate of 40 mL/min. over 10 minutes with a 5 minute hold. The solvent was evaporated giving 234 mgs (60% yield) of 2-(4-fluorophenyl)-5-(2-hydroxy-5-(1-(pyridin-2-yl)cyclopropylcarbamoyl)phenyl)-N-methylbenzofuran-3-carboxamide as a white solid. The LC/MS data was obtained on a Shimadzu analytical LC/Micromass Platform LC (ESI+) at 220 nm using the following set of conditions: Sunfire 5 μm C18, 4.6×50 mm column, with a gradient of 0-100% B (B=90% HPLC grade methanol/0.1% trifluoroacetic acid/10% HPLC grade water), (A=90% HPLC grade water/0.1% trifluoroacetic acid/10% HPLC grade methanol), in 4 minutes with a 1 minute hold at a rate of 4 mL/minute. 1H NMR (400 MHz, THF-d8) δ ppm 1.25-1.31 (m, 2 H), 1.59-1.66 (m, 2 H), 2.90 (d, J=4.52 Hz, 3 H), 6.91 (d, J=8.53 Hz, 1 H), 7.08 (dd, J=6.90, 5.40 Hz, 1 H), 7.17-7.24 (m, 2 H), 7.45-7.65 (m, 5 H), 7.79 (dd, J=8.41, 2.13 Hz, 1 H), 7.88 (d, J=1.25 Hz, 1 H), 7.93 (d, J=2.01 Hz, 1 H), 8.08-8.17 (m, 2 H), 8.39-8.45 (m, 1 H), 8.49 (br. s., 2 H). LCMS Rt=1.495 min., m/z 522.33 (M+H), 94% purity. To a 100 mL round-bottomed flask equipped with a reflux condenser The reaction mixture was cooled to room temperature quenched with methanol evaporated purified a flow rate of 40 mL/min. over 10 minutes with a 5 minute hold The solvent was evaporated

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

Procedure: To a suspension of 4-benzyloxy-1-methyl-2-methylamino-1H-benzimidazole (150 mg) in dichloromethane (2 ml) was added boron tribromide—methyl sulfide complex (211 mg) in dryice-aceton bath, and the mixture was stirred for 1 hour under ice-cooling and then at ambient temperature overnight. To the reaction mixture were added chloroform—methanol (3:1, v/v) and saturated sodium bicarbonate solution, and insoluble material was filtered off. The separated organic layer was concentrated in vacuo. The residue was purified by preparative thin layer chromatography (chloroform:methanol=8:1, v/v) to give 4-hydroxy-1-methyl-2-methylamino-1H-benzimidazole (49 mg). cooling at ambient temperature overnight v/v) and saturated sodium bicarbonate solution, and insoluble material was filtered off The separated organic layer was concentrated in vacuo The residue was purified by preparative thin layer chromatography (chloroform

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

Procedure: To a suspension of 4-benzyloxy-1-methyl-2-methylamino-1H-benzimidazole (150 mg) in dichloromethane (2 ml) was added boron tribromide—methyl sulfide complex (211 mg) in dryice-aceton bath, and the mixture was stirred for 1 hour under ice-cooling and then at ambient temperature overnight. To the reaction mixture were added chloroform—methanol (3:1, v/v) and saturated sodium bicarbonate solution, and insoluble material was filtered off. The separated organic layer was concentrated in vacuo. The residue was purified by preparative thin layer chromatography (chloroform:methanol=8:1, v/v) to give 4-hydroxy-1-methyl-2-methylamino-1H-benzimidazole (49 mg). cooling at ambient temperature overnight v/v) and saturated sodium bicarbonate solution, and insoluble material was filtered off The separated organic layer was concentrated in vacuo The residue was purified by preparative thin layer chromatography (chloroform

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

Procedure: To a solution of 2-dipropylamino-5-methoxy-3-methylquinazolin-4(3H)-one (130 mg, 0.449 mmol) in dichloroethane (2 ml) was added boron tribromide-methyl sulfide complex (1M solution in dichloromethane, 0.899 ml, 0.899 mmol) under nitrogen atmosphere. The mixture was refluxed for 2 h. The reaction was quenched with water and stirred for 10 min at room temperature. The aqueous phase was extracted with ether. The extract was washed with brine, dried over magnesium sulfate and concentrated under vacuum to afford 123 mg (99%) of the title compound. The residue was used for the next reaction without further purification. The mixture was refluxed for 2 h The reaction was quenched with water The aqueous phase was extracted with ether The extract was washed with brine dried over magnesium sulfate concentrated under vacuum

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

Procedure: To a solution of the product from Step D (0.56 g, 0.23 mmol) in 1,2-dichloroethane (10 mL) was added boron tribromide-methylsulfide complex in THF solution (1.0M, 0.5 mL, 0.5 mmol) and the solution heated to reflux for 16 h. The solution was allowed to cool, poured into aqueous NaHCO3, extracted with chloroform (2×20 mL), dried (Na2SO4) and concentrated. The crude product was purified by chromatography (silica, 20% methanol in dichloromethane) to give a solid (0.007 g, 13%): 1H NMR (CDCl3) δ7.39 (m, 2H), 7.00 (s, 1H), 6.79 (dd, J=8.4, 2.4 Hz, 1H), 4.30 (dd, J=13.8, 4.8 Hz, 1H), 4.14 (dd, J=13.8,7.8Hz, 1H), 3.55 (m, 1H), 3.48 (bm, 4H), 1.19 (d, J=6.6 Hz, 3H); MS m/z 230 [M+H]+. the solution heated to reflux for 16 h to cool extracted with chloroform (2×20 mL) dried (Na2SO4) concentrated The crude product was purified by chromatography (silica, 20% methanol in dichloromethane)

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

Procedure: To a solution of the product from Step D (0.56 g, 0.23 mmol) in 1,2-dichloroethane (10 mL) was added boron tribromide-methylsulfide complex in THF solution (1.0M, 0.5 mL, 0.5 mmol) and the solution heated to reflux for 16 h. The solution was allowed to cool, poured into aqueous NaHCO3, extracted with chloroform (2×20 mL), dried (Na2SO4) and concentrated. The crude product was purified by chromatography (silica, 20% methanol in dichloromethane) to give a solid (0.007 g, 13%): 1H NMR (CDCl3) δ7.39 (m, 2H), 7.00 (s, 1H), 6.79 (dd, J=8.4, 2.4 Hz, 1H), 4.30 (dd, J=13.8, 4.8 Hz, 1H), 4.14 (dd, J=13.8,7.8Hz, 1H), 3.55 (m, 1H), 3.48 (bm, 4H), 1.19 (d, J=6.6 Hz, 3H); MS m/z 230 [M+H]+. the solution heated to reflux for 16 h to cool extracted with chloroform (2×20 mL) dried (Na2SO4) concentrated The crude product was purified by chromatography (silica, 20% methanol in dichloromethane)

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

Procedure: To a solution of the product from Step D (26 mg, 0.1 mmol) in 1,2-dichloroethane (16 mL) was added boron tribromide-methylsulfide complex (1.0 M, 1.0 mL, 1.0 mmol) and the solution stirred at reflux for 72 h. The solution was poured into aqueous NaHCO3, and extracted with ethyl acetate (2×20 mL). The combined extracts were dried (MgSO4) concentrated to a residue, which was purified by chromatography (silica, gradient, 10 to 25% methanol in dichloromethane) to furnish a solid (8 mg, 32%): 1H NMR (CDCl3) δ 8.30 (d, J=9.0 Hz, 1H), 7.99 (s, 1H), 7.60 (d, J=8.4 Hz, 1H), 7.35 (d, J=9.0 Hz, 1H), 7.29 (d, J=2.4 Hz, 1H), 7.21 (dd, J=9.0, 2.4 Hz, 1H), 3.6 (m, 1H), 3.3 (m, 2H), 1.25 (d, J=6.6 Hz, 3H); MS m/z 242 [M+H]+. at reflux for 72 h extracted with ethyl acetate (2×20 mL) The combined extracts were dried (MgSO4) concentrated to a residue, which was purified by chromatography (silica, gradient, 10 to 25% methanol in dichloromethane)

Conditions: temp:90.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a 100 mL round-bottomed flask equipped with a reflux condenser was added 2-(4-fluorophenyl)-5-(2-methoxy-5-(1-(pyridin-2-yl)cyclopropylcarbamoyl)phenyl)-N-methylbenzofuran-3-carboxamide (400 mg, 0.747 mmol), DCE (42 mL) and boron tribromide-methyl sulfide complex (1868 mg, 5.97 mmol). The solution was placed under nitrogen and stirred overnight at 90° C. The reaction mixture was cooled to room temperature, quenched with methanol and evaporated to near dryness. The mixture was taken up in 10 mL of methanol and purified using a Shimadzu preparative HPLC employing methanol/water/0.1% trifluoroacetic acid where solvent A was 10% methanol/90% water/0.1% trifluoroacetic acid and solvent B was 10% water/90% methanol/0.1% trifluoroacetic acid with a PHENOMENEX® Luna 10 μm C18 30×100 mm column at a gradient of 40-100% B and a flow rate of 40 mL/min. over 10 minutes with a 5 minute hold. The solvent was evaporated giving 234 mgs (60% yield) of 2-(4-fluorophenyl)-5-(2-hydroxy-5-(1-(pyridin-2-yl)cyclopropylcarbamoyl)phenyl)-N-methylbenzofuran-3-carboxamide as a white solid. The LC/MS data was obtained on a Shimadzu analytical LC/MICROMASS® Platform LC (ESI+) at 220 nm using the following set of conditions: Sunfire 5 μm C18, 4.6×50 mm column, with a gradient of 0-100% B (B=90% HPLC grade methanol/0.1% trifluoroacetic acid/10% HPLC grade water), (A=90% HPLC grade water/0.1% trifluoroacetic acid/10% HPLC grade methanol), in 4 minutes with a 1 minute hold at a rate of 4 mL/minute. 1H NMR (400 MHz, THF-d8) δ ppm 1.25-1.31 (m, 2H), 1.59-1.66 (m, 2H), 2.90 (d, J=4.52 Hz, 3H), 6.91 (d, J=8.53 Hz, 1H), 7.08 (dd, J=6.90, 5.40 Hz, 1H), 7.17-7.24 (m, 2H), 7.45-7.65 (m, 5H), 7.79 (dd, J=8.41, 2.13 Hz, 1H), 7.88 (d, J=1.25 Hz, 1H), 7.93 (d, J=2.01 Hz, 1H), 8.08-8.17 (m, 2H), 8.39-8.45 (m, 1H), 8.49 (br. s., 1H). LCMS Rt=1.495 min., m/z 522.33 (M+H), 94% purity. To a 100 mL round-bottomed flask equipped with a reflux condenser The reaction mixture was cooled to room temperature quenched with methanol evaporated purified a flow rate of 40 mL/min. over 10 minutes with a 5 minute hold The solvent was evaporated

Conditions: temp:90.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a 100 mL round-bottomed flask equipped with a reflux condenser was added 2-(4-fluorophenyl)-5-(2-methoxy-5-(1-(pyridin-2-yl)cyclopropylcarbamoyl)phenyl)-N-methylbenzofuran-3-carboxamide (400 mg, 0.747 mmol), DCE (42 mL) and boron tribromide-methyl sulfide complex (1868 mg, 5.97 mmol). The solution was placed under nitrogen and stirred overnight at 90° C. The reaction mixture was cooled to room temperature, quenched with methanol and evaporated to near dryness. The mixture was taken up in 10 mL of methanol and purified using a Shimadzu preparative HPLC employing methanol/water/0.1% trifluoroacetic acid where solvent A was 10% methanol/90% water/0.1% trifluoroacetic acid and solvent B was 10% water/90% methanol/0.1% trifluoroacetic acid with a PHENOMENEX® Luna 10 μm C18 30×100 mm column at a gradient of 40-100% B and a flow rate of 40 mL/min. over 10 minutes with a 5 minute hold. The solvent was evaporated giving 234 mgs (60% yield) of 2-(4-fluorophenyl)-5-(2-hydroxy-5-(1-(pyridin-2-yl)cyclopropylcarbamoyl)phenyl)-N-methylbenzofuran-3-carboxamide as a white solid. The LC/MS data was obtained on a Shimadzu analytical LC/MICROMASS® Platform LC (ESI+) at 220 nm using the following set of conditions: Sunfire 5 μm C18, 4.6×50 mm column, with a gradient of 0-100% B (B=90% HPLC grade methanol/0.1% trifluoroacetic acid/10% HPLC grade water), (A=90% HPLC grade water/0.1% trifluoroacetic acid/10% HPLC grade methanol), in 4 minutes with a 1 minute hold at a rate of 4 mL/minute. 1H NMR (400 MHz, THF-d8) δ ppm 1.25-1.31 (m, 2H), 1.59-1.66 (m, 2H), 2.90 (d, J=4.52 Hz, 3H), 6.91 (d, J=8.53 Hz, 1H), 7.08 (dd, J=6.90, 5.40 Hz, 1H), 7.17-7.24 (m, 2H), 7.45-7.65 (m, 5H), 7.79 (dd, J=8.41, 2.13 Hz, 1H), 7.88 (d, J=1.25 Hz, 1H), 7.93 (d, J=2.01 Hz, 1H), 8.08-8.17 (m, 2H), 8.39-8.45 (m, 1H), 8.49 (br. s., 1H). LCMS Rt=1.495 min., m/z 522.33 (M+H), 94% purity. To a 100 mL round-bottomed flask equipped with a reflux condenser The reaction mixture was cooled to room temperature quenched with methanol evaporated purified a flow rate of 40 mL/min. over 10 minutes with a 5 minute hold The solvent was evaporated

Conditions: temp:83.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a suspension containing 2-(4-fluorophenyl)-5-methoxy-N-methylbenzo[b]thiophene-3-carboxamide (0.58 g, 1.8 mmol) and DCE (18 mL), was added boron tribromide-methylsulfide complex (2.3 g, 7.4 mmol) in one portion. The mixture was stirred in a closed vessel at 83° C. for 9 h under a nitrogen atmosphere, cooled to room temperature and quenched with aqueous HCl (20 mL, 1.0 N). The mixture was concentrated to remove all solvent and water was added (50 mL). The aqueous mixture was extracted with ethyl acetate (3×20 mL), dried over MgSO4, filtered and concentrated to afford 2-(4-fluorophenyl)-5-hydroxy-N-methylbenzo[b]thiophene-3-carboxamide as a tan solid which was used without further purification. 1H NMR (500 MHz, DMSO-D6) δ ppm 9.56 (s, 1H), 8.31 (d, J=4.58 Hz, 1H), 7.78 (d, J=8.55 Hz, 1H), 7.55-7.63 (m, 2H), 7.29-7.37 (m, 2H), 7.08 (d, J=2.14 Hz, 1H), 6.91 (dd, J=8.85, 2.44 Hz, 1H), 2.73 (d, J=4.58 Hz, 3H). LCMS: retention time: 2.137 mM. LC data was recorded on a Shimadzu LC-10AS liquid chromatograph equipped with a Phenomenex-Luna, 10 micron, C18, 4.6×50 mm column using a SPD-10AV UV-Vis detector at a detector wave length of 220 nM. The elution conditions employed a flow rate of 4 mL/min, a gradient of 100% solvent A/0% solvent B to 0% solvent A/100% solvent B, a gradient time of 4 min, a hold time of 1 min, and an analysis time of 5 mM where solvent A was 5% CH3CN/95% H2O/10 mM ammonium acetate and solvent B was 5% H2O/95% CH3CN/10 mM ammonium acetate. MS data was determined using a Micromass Platform for LC in electrospray mode. m/z 302 (MH+). cooled to room temperature quenched with aqueous HCl (20 mL, 1.0 N) The mixture was concentrated to remove all solvent and water was added (50 mL) The aqueous mixture was extracted with ethyl acetate (3×20 mL) dried over MgSO4 filtered concentrated

Conditions: temp:105.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a suspension containing 2-(4-fluorophenyl)-5-methoxy-N-methylpyrazolo[1,5-a]pyridine-3-carboxamide (0.30 g, 1.0 mmol) and toluene (10 mL), was added boron tribromide-methylsulfide complex (1.3 g, 4.0 mmol) in one portion. The mixture was stirred in a closed vessel at 105° C. for 40 h under a nitrogen atmosphere, cooled to room temperature and extracted with aqueous sodium hydroxide (3×20 mL, 2.0 M). The combined aqueous extracts were neutralized with aqueous HCl (2.0 M, approx. 60 mL) and extracted with ethyl acetate (3×50 mL). The combined organic portions were dried over MgSO4, filtered and concentrated to afford 2-(4-fluorophenyl)-5-hydroxy-N-methylpyrazolo[1,5-a]pyridine-3-carboxamide as a tan solid which was used without further purification. 1H NMR (500 MHz, DMSO-D6) δ ppm 10.69 (s, 1H), 8.55 (d, J=7.32 Hz, 1H), 7.75-7.82 (m, 2H), 7.50 (d, J=4.58 Hz, 1H), 7.28 (t, J=9.00 Hz, 2H), 7.05 (d, J=2.44 Hz, 1H), 6.65 (dd, J=7.48, 2.59 Hz, 1H), 2.72 (d, J=4.58 Hz, 3H). LCMS: retention time: 1.102 min. LC data was recorded on a Shimadzu LC-10AS liquid chromatograph equipped with a Phenomenex-Luna, 10u, C18, 3.0×50 mm column using a SPD-10AV UV-Vis detector at a detector wave length of 220 nM. The elution conditions employed a flow rate of 4 mL/min, a gradient of 100% solvent A/0% solvent B to 0% solvent A/100% solvent B, a gradient time of 4 min, a hold time of 1 min, and an analysis time of 5 min where solvent A was 10% CH3CN/90% H2O/10 mM TFA and solvent B was 10% H2O/90% CH3CN/10 mM TFA. MS data was determined using a Micromass Platform for LC in electrospray mode. m/z 285 (MH+). cooled to room temperature extracted with aqueous sodium hydroxide (3×20 mL, 2.0 M) extracted with ethyl acetate (3×50 mL) The combined organic portions were dried over MgSO4 filtered concentrated