Polyphosphoric acid trimethylsilyl ester

Conditions: temp:130.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 150 mg (0.69 mmol) of 5-amino-1-(2-methylphenyl)-1H-pyrazole-4-carboxamide (Example 23A) and 130 mg (0.83 mmol) of 2-(4-methylcyclohexyl)acetic acid are mixed with 3 ml of trimethylsilyl polyphosphate and stirred at 130° C. for 3 h. The hot reaction mixture is added to 20 ml of water and then extracted with dichloromethane (2×20 ml). The combined organic phases are washed with water (20 ml) and with saturated sodium chloride solution (20 ml) and dried over sodium sulphate. The solvent is distilled off under reduced pressure, and the crude product is purified by preparative HPLC(YMC Gel ODS-AQ S 5/15 μm; eluent A: water, eluent B: acetonitrile; gradient: 0 min 30% B, 5 min 30% B, 50 min 95% B). 182 g (78% of theory) of the product are obtained. extracted with dichloromethane (2×20 ml) The combined organic phases are washed with water (20 ml) and with saturated sodium chloride solution (20 ml) dried over sodium sulphate The solvent is distilled off under reduced pressure the crude product is purified by preparative HPLC(YMC Gel ODS-AQ S 5/15 μm 0 min 30% B, 5 min 30% B, 50 min 95% B 182 g (78% of theory) of the product are obtained

Conditions: temp:160.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To the PPSE solution was added 15.0 g of 4,4'-dibromodiphenic acid, 8.11 g of o-phenylene diamine (recrystallized from methylene chloride and charcoal). This mixture was rapidly heated to 160° C. and maintained there for 20 hours. The solution was cooled, then poured into 2 1 of 10% NaHCO3 solution. The product was filtered, washed with 300 ml of hot methylene chloride, then extracted using a Soxhlet extractor using 10% NaHCO3 overnight. The product was dried then recrystallized from ethanol to give 11 g of white crystals, mp 326° C.-328° C. Analysis calculated for C26H16N4Br2 : C, 57.38; H, 2.96; N, 10.29. Found: C, 57.81; H, 3.04, N, 10.30. maintained there for 20 hours The solution was cooled The product was filtered washed with 300 ml of hot methylene chloride extracted 10% NaHCO3 overnight The product was dried then recrystallized from ethanol

Conditions: temp:130.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a mixture of 2-amino-4-methylbenzamide (804 mg, 5.36 mmol) and sodium 2,2-difluoro-2-(5-fluoropyridin-2-yl)acetate from Example 2 Step B (1.25 g, 5.89 mmol) was added trimethylsilyl polyphosphate (ca. 10 mL) and the mixture was heated at 130° C. in a sand bath overnight. The mixture was allowed to cool to rt, and then water (75 mL) and EtOAc (75 mL) were added and the mixture was stirred at rt for 1 h. The organic layer was separated, washed with brine, dried over Na2SO4, filtered and concentrated under reduced pressure. The residue was purified by silica gel chromatography eluting with 0-60% EtOAc/hexanes to afford 2-(difluoro(5-fluoropyridin-2-yl)methyl)-7-methylquinazolin-4-ol (1.09 g, 66%). LCMS (ESI) m/z 306 (M+H)+. to cool to rt The organic layer was separated washed with brine dried over Na2SO4 filtered concentrated under reduced pressure The residue was purified by silica gel chromatography eluting with 0-60% EtOAc/hexanes

Conditions: temp:115.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Sodium 2,2-difluoro-2-(5-fluoropyridin-2-yl)acetate from Example 2 Step B (1.02 g, 4.8 mmol) and 2-amino-3-methyl-benzamide (0.6 g, 4.0 mmol) were combined with trimethylsilyl polyphosphate (8.0 mL) and the mixture was heated at 115° C. for 18 h with vigorous stirring. The mixture was allowed to cool to rt, then the mixture was partitioned between water (15 mL) and ethyl acetate (15 mL). The organic layer was separated and the aqueous layer (pH˜1) was extracted with ethyl acetate (30 mL×3). The combined organic layers were separated, dried over magnesium sulfate, filtered, and concentrated under reduced pressure. The residue was purified by silica gel chromatography eluting with 1:10 to 1:1 EtOAc/hexanes to afford 2-[difluoro-(5-fluoro-pyridin-2-yl)-methyl]-8-methyl-3H-quinazolin-4-one as an off-white solid (0.6 g, 29%). to cool to rt the mixture was partitioned between water (15 mL) and ethyl acetate (15 mL) The organic layer was separated the aqueous layer (pH˜1) was extracted with ethyl acetate (30 mL×3) The combined organic layers were separated dried over magnesium sulfate filtered concentrated under reduced pressure The residue was purified by silica gel chromatography eluting with 1:10 to 1:1 EtOAc/hexanes

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a mixture of sodium 2,2-difluoro-2-(5-fluoropyridin-2-yl)acetate from Example 2 Step B (2.05 g, 9.62 mmol) and 2-amino-4-bromobenzamide (1.89 g, 8.75 mmol) was added trimethylsilyl polyphosphate (˜15 mL) and the mixture was stirred overnight at 120° C. Equal volumes of EtOAc and water were added and the resulting solution was stirred for 1 h. The EtOAc layer was washed with brine, dried over Na2SO4 and then concentrated under reduced pressure. Et2O was added and evaporated. Trituration of the residue with hexanes, followed by collection of the solid by filtration afforded 7-bromo-2-(difluoro(5-fluoropyridin-2-yl)methyl)quinazolin-4-ol (2.49 g, 77%). 1H NMR (300 MHz, DMSO-d6) δ 11.37 (s, 1H), 8.76 (s, 1H), 7.97-8.07 (m, 2H), 7.88 (d, J=8.3 Hz, 1H), 7.69-7.81 (m, 2H); the resulting solution was stirred for 1 h The EtOAc layer was washed with brine dried over Na2SO4 concentrated under reduced pressure Et2O was added evaporated Trituration of the residue with hexanes, followed by collection of the solid by filtration

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a mixture of sodium 2,2-difluoro-2-(5-fluoropyridin-2-yl)acetate from Example 2 Step B (2.05 g, 9.62 mmol) and 2-amino-4-bromobenzamide (1.89 g, 8.75 mmol) was added trimethylsilyl polyphosphate (˜15 mL) and the mixture was stirred overnight at 120° C. Equal volumes of EtOAc and water were added and the resulting solution was stirred for 1 h. The EtOAc layer was washed with brine, dried over Na2SO4 and then concentrated under reduced pressure. Et2O was added and evaporated. Trituration of the residue with hexanes, followed by collection of the solid by filtration afforded 7-bromo-2-(difluoro(5-fluoropyridin-2-yl)methyl)quinazolin-4-ol (2.49 g, 77%). 1H NMR (300 MHz, DMSO-d6) δ 11.37 (s, 1H), 8.76 (s, 1H), 7.97-8.07 (m, 2H), 7.88 (d, J=8.3 Hz, 1H), 7.69-7.81 (m, 2H); the resulting solution was stirred for 1 h The EtOAc layer was washed with brine dried over Na2SO4 concentrated under reduced pressure Et2O was added evaporated Trituration of the residue with hexanes, followed by collection of the solid by filtration

Conditions: temp:115.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Sodium 2,2-difluoro-2-(5-fluoropyridin-2-yl)acetate from Example 2 Step B (2.3 g, 10.8 mmol) and 2-amino-4-methoxybenzamide (1.5 g, 9.0 mmol) were combined with trimethylsilyl polyphosphate (15 mL) and the mixture was heated at 115° C. for 18 h with vigorous stirring. To mixture was allowed to cool to rt, and then was partitioned between were water (15 mL) and EtOAc (15 mL). The organic layer was separated and the aqueous layer (pH˜1) was extracted with EtOAc (3×30 mL). The combined organic layers were dried over MgSO4, filtered, and concentrated under reduced pressure. The residue was purified by silica gel chromatography eluting with 1:10 to 1:1 EtOAc/hexanes to afford 2-(difluoro(5-fluoropyridin-2-yl)methyl)-7-methoxyquinazolin-4(3H)-one (487 mg) as an off-white solid. to cool to rt was partitioned The organic layer was separated the aqueous layer (pH˜1) was extracted with EtOAc (3×30 mL) The combined organic layers were dried over MgSO4 filtered concentrated under reduced pressure The residue was purified by silica gel chromatography eluting with 1:10 to 1:1 EtOAc/hexanes

Conditions: temp:115.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Sodium 2,2-difluoro-2-(5-fluoropyridin-2-yl)acetate from Example 2 Step B (2.3 g, 10.8 mmol) and 2-amino-4-methoxybenzamide (1.5 g, 9.0 mmol) were combined with trimethylsilyl polyphosphate (15 mL) and the mixture was heated at 115° C. for 18 h with vigorous stirring. To mixture was allowed to cool to rt, and then was partitioned between were water (15 mL) and EtOAc (15 mL). The organic layer was separated and the aqueous layer (pH˜1) was extracted with EtOAc (3×30 mL). The combined organic layers were dried over MgSO4, filtered, and concentrated under reduced pressure. The residue was purified by silica gel chromatography eluting with 1:10 to 1:1 EtOAc/hexanes to afford 2-(difluoro(5-fluoropyridin-2-yl)methyl)-7-methoxyquinazolin-4(3H)-one (487 mg) as an off-white solid. to cool to rt was partitioned The organic layer was separated the aqueous layer (pH˜1) was extracted with EtOAc (3×30 mL) The combined organic layers were dried over MgSO4 filtered concentrated under reduced pressure The residue was purified by silica gel chromatography eluting with 1:10 to 1:1 EtOAc/hexanes

Conditions: temp:130.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 150 mg (0.69 mmol) of 5-amino-1-(2-methylphenyl)-1H-pyrazole-4-carboxamide (Example 23A) and 130 mg (0.83 mmol) of 2-(4-methylcyclohexyl)acetic acid are mixed with 3 ml of trimethylsilyl polyphosphate and stirred at 130° C. for 3 h. The hot reaction mixture is added to 20 ml of water and then extracted with dichloromethane (2×20 ml). The combined organic phases are washed with water (20 ml) and with saturated sodium chloride solution (20 ml) and dried over sodium sulphate. The solvent is distilled off under reduced pressure, and the crude product is purified by preparative HPLC(YMC Gel ODS-AQ S 5/15 μm; eluent A: water, eluent B: acetonitrile; gradient: 0 min 30% B, 5 min 30% B, 50 min 95% B). 182 g (78% of theory) of the product are obtained. extracted with dichloromethane (2×20 ml) The combined organic phases are washed with water (20 ml) and with saturated sodium chloride solution (20 ml) dried over sodium sulphate The solvent is distilled off under reduced pressure the crude product is purified by preparative HPLC(YMC Gel ODS-AQ S 5/15 μm 0 min 30% B, 5 min 30% B, 50 min 95% B 182 g (78% of theory) of the product are obtained

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

Procedure: 4-Cyano-2-methylbenzaldehyde (200 mg, 1.38 mmol), 3-trifluoromethylphenyl thiourea (276 mg, 1.25 mmol), ethyl 3-oxobutanoate (179 mg, 1.38 mmol) and trimethylsilyl polyphosphate (225 mg) in 5 ml THF are stirred overnight at reflux temperature. The reaction mixture is cooled to room temperature, and after addition of 20 ml 0.5 M hydrochloric acid the aqueous phase is extracted with ethyl acetate (2×20 ml). The combined organic layers are washed with saturated aqueous sodium carbonate solution and dried with sodium sulfate. The solvent is removed in vacuo and the crude product is purified via preparative HPLC (RP18-column; eluent: aceto-nitrile-water, gradient 10:90 to 90:10). at reflux temperature is extracted with ethyl acetate (2×20 ml) The combined organic layers are washed with saturated aqueous sodium carbonate solution dried with sodium sulfate The solvent is removed in vacuo the crude product is purified via preparative HPLC (RP18-column; eluent: aceto-nitrile-water, gradient 10:90 to 90:10)

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Under argon, trimethylsilyl polyphosphate (10.6 g) is dissolved in 75.7 ml absolute dioxane. To this solution are added 4-cyanobenzaldehyde (5.95 g, 45.4 mmol), 3-trifluoromethylphenyl thiourea (5 g, 22.7 mmol) and 2-cyanoethyl acetoacetate (6.4 g, 45.4 mmol). The reaction mixture is stirred at 80° C. for 3 hours. After evaporation of the dioxane solvent, the residue is dissolved in ethyl acetate and washed with saturated aqueous sodium bicarbonate solution, 38% sodium bisulfite solution and saturated sodium chloride solution. After drying with magnesium sulfate and evaporating off the solvent, the residue is dissolved in 15 ml methanol and purified by preparative HPLC (column: Kromasil 100 C 185 μm, 30 mm×150 mm; precolumn: Gromsil ODS 4 HE 15 μm, 10 mm×20 mm; flow rate: 66 ml/min; solvent A: acetonitrile, solvent B: water; gradient: 0 min 10% A, 3 min 10% A, 11 min 90% A, 13 min 90% A, 13.2 min 10% A, 15 min 10% A; wavelength: 220 nm; injection volume: approx. 2000 μl; number of injections: 12). The product containing fractions are combined and concentrated in vacuo. After evaporation of the dioxane solvent the residue is dissolved in ethyl acetate washed with saturated aqueous sodium bicarbonate solution, 38% sodium bisulfite solution and saturated sodium chloride solution After drying with magnesium sulfate evaporating off the solvent the residue is dissolved in 15 ml methanol purified by preparative HPLC (column: Kromasil 100 C 185 μm, 30 mm×150 mm; precolumn: Gromsil ODS 4 HE 15 μm, 10 mm×20 mm; flow rate: 66 ml/min; solvent A: acetonitrile, solvent B: water; gradient: 0 min 10% A, 3 min 10% A, 11 min 90% A, 13 min 90% A, 13.2 min 10% A, 15 min 10% A; wavelength: 220 nm; injection volume: approx. 2000 μl; number of injections: 12) The product containing fractions concentrated in vacuo

Conditions: temp:200.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To 5 mL of trimethylsilyl polyphosphate was added 3-aminopyridin-2-ol (150 mg, 1.59 mmol) and 3-methoxy-4-pyridin-2-ylbenzoic acid (229 mg, 1.0 mmol). The mixture was heated at 200° C. for 2 h, quenched over ice, and made basic (pH 14) with 1N NaOH. The aqueous phase was extracted with EtOAc (3×200 mL). The combined organic layers were washed with brine, dried over MgSO4, filtered, and concentrated in vacuo. The resultant oil was taken up in a minimum of EtOAc and purified by prep TLC (1:1 EtOAc/hexanes) to give 2-(3-methoxy-4-pyridin-2-ylphenyl)[1,3]oxazolo[5,4-b]pyridine as a light yellow solid. 1H NMR (DMSO-d6, 300 MHz) δ 8.73 (dq, 1H), 8.43 (dd, 1H), 8.32 (dd, 1H), 8.02 (d, 1H), 7.99–7.93 (m, 2H), 7.92–7.85 (m, 2H), 7.55 (dd, 1H), 7.40 (ddd, 1H), 4.01 (s, 3H); MS (ESI) 304 (M+H)+. quenched over ice The aqueous phase was extracted with EtOAc (3×200 mL) The combined organic layers were washed with brine dried over MgSO4 filtered concentrated in vacuo purified by prep TLC (1:1 EtOAc/hexanes)