3-iodooxetane

Conditions: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In a microwave vial 2-(6-fluoro-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carbaldehyde (300 mg, 0.73 mmol) was dissolved in DMF (5 ml) and cesium carbonate (714 mg, 2.19 mmol) and 3-iodooxetane (200 mg, 1.08 mmol) were added. The vial was sealed and heated at 100° C. under microwave irradiation for 2 h. The reaction was cooled, quenched with water and extracted with EtOAc (2×). The combined organics were washed with sat LiCl and brine then dried over MgSO4 and concentrated. The crude residue was purified by silica gel chromatography with 20% to 100% EtOAc/heptane to provide 295 mg (86%) of 2-(6-fluoro-1-oxetan-3-yl-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carbaldehyde as a white solid. 1H NMR (CDCl3, 300 MHz): δ (ppm) 10.48 (s, 1H), 9.40 (s, 1H), 8.86 (dd, J=9.1, 5.3 Hz, 1H), 8.31 (s, 1H), 7.11-7.25 (m, 2H), 5.72-5.86 (m, 3H), 5.41 (t, J=6.6 Hz, 2H), 5.20 (t, J=7.4 Hz, 2H), 3.56-3.70 (m, 2H), 0.85-1.06 (m, 2H), −0.02 (s, 9H). The vial was sealed The reaction was cooled quenched with water extracted with EtOAc (2×) The combined organics were washed with sat LiCl and brine then dried over MgSO4 concentrated The crude residue was purified by silica gel chromatography with 20% to 100% EtOAc/heptane

Conditions: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In a microwave vial 2-(6-fluoro-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carbaldehyde (300 mg, 0.73 mmol) was dissolved in DMF (5 ml) and cesium carbonate (714 mg, 2.19 mmol) and 3-iodooxetane (200 mg, 1.08 mmol) were added. The vial was sealed and heated at 100° C. under microwave irradiation for 2 h. The reaction was cooled, quenched with water and extracted with EtOAc (2×). The combined organics were washed with sat LiCl and brine then dried over MgSO4 and concentrated. The crude residue was purified by silica gel chromatography with 20% to 100% EtOAc/heptane to provide 295 mg (86%) of 2-(6-fluoro-1-oxetan-3-yl-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carbaldehyde as a white solid. 1H NMR (CDCl3, 300 MHz): δ (ppm) 10.48 (s, 1H), 9.40 (s, 1H), 8.86 (dd, J=9.1, 5.3 Hz, 1H), 8.31 (s, 1H), 7.11-7.25 (m, 2H), 5.72-5.86 (m, 3H), 5.41 (t, J=6.6 Hz, 2H), 5.20 (t, J=7.4 Hz, 2H), 3.56-3.70 (m, 2H), 0.85-1.06 (m, 2H), −0.02 (s, 9H). The vial was sealed The reaction was cooled quenched with water extracted with EtOAc (2×) The combined organics were washed with sat LiCl and brine then dried over MgSO4 concentrated The crude residue was purified by silica gel chromatography with 20% to 100% EtOAc/heptane

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

Procedure: A mixture of 5-bromo-1-methyl-3-(5-methyl-1H-pyrazol-3-ylamino)pyridin-2(1H)-one 115a (200 mg, 0.71 mmol), 3-iodooxetane (647 mg, 3.53 mmol), Cs2CO3 (1150 mg, 3.53 mmol), and acetonitrile (5 mL) was heated at 80° C. in a sealed tube overnight. The mixture was then cooled to room temperature and filtered. The filtrate was concentrated under reduced pressure and the residue was purified by silica-gel column chromatography eluting with 20:1 dichloromethane/methanol to afford the 312a as a yellow solid (120 mg, 50%). MS-ESI: [M+H]+ 339.1 The mixture was then cooled to room temperature filtered The filtrate was concentrated under reduced pressure the residue was purified by silica-gel column chromatography eluting with 20:1 dichloromethane/methanol

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

Procedure: A sealed tube was charged with 4-nitro-1H-imidazole (500 mg, 4.42 mmol), 3-iodooxetane (920 mg, 5.0 mmol), Cs2CO3 (2.90 g, 8.84 mmol), and dioxane (12 mL). The sealed tube was heated at 120° C. for 16 h. It was then cooled to room temperature and filtered. The filtrate was evaporated under reduced pressure. The residue was purified by silica-gel column chromatography eluting with 30:1 dichloromethane/methanol to afford 285a as a white solid (250 mg, 33%). MS-ESI: [M+H]+ 170.2. It was then cooled to room temperature filtered The filtrate was evaporated under reduced pressure The residue was purified by silica-gel column chromatography eluting with 30:1 dichloromethane/methanol

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

Procedure: 3,5-difluorophenylboronic acid (2.0 equiv.), (1R,2R)-2-aminocyclohexanol (0.06 equiv.), NaHMDS (2.0 equiv.), and nickel(II) iodide (0.06 equiv.) were dissolved in 2-propanol (0.35 M). The mixture was degassed with N2, stirred at rt for 10 min and then a solution of 3-iodooxetane (1.0 equiv.) in 2-Propanol (0.70 M) was added. The mixture was sealed and heated at 80° C. in the microwave for 20 min. The mixture was filtered through celite, eluting with EtOH and concentrated. The crude residue was purified by ISCO SiO2 chromatography eluting with 0-100% EtOAc in Heptanes to afford 3-(3,5-difluorophenyl)oxetane in 63% yield. 1H NMR (400 MHz, <cdcl3>) δ 6.88-6.96 (m, 2H), 6.72 (tt, J=2.20, 8.95 Hz, 1H), 5.08 (dd, J=6.26, 8.22 Hz, 2H), 4.71 (t, J=6.26 Hz, 2H), 4.14-4.24 (m, 1H). The mixture was degassed with N2 The mixture was sealed heated at 80° C. in the microwave for 20 min The mixture was filtered through celite eluting with EtOH concentrated The crude residue was purified by ISCO SiO2 chromatography eluting with 0-100% EtOAc in Heptanes

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

Procedure: To a solution of N-(4-(2-hydroxyphenyl)-6-methylpyridin-3-yl)-N-methyl-3-(methylsulfonyl)-5-(trifluoromethyl)benzamide (100 mg, 215 μmol) in DMF (2 mL) was added K2CO3 (59.5 mg, 431 μmol) and 3-iodooxetane (43.6 mg, 237 μmol). The reaction mixture was stirred for 2 hours at room temperature followed by stirring for 18 hours at 80° C. The reaction mixture was poured on 30 mL 10% aqueous NaHCO3 solution and 30 mL EtOAc and the layers were separated. The aqueous layer was extracted a second time with 30 mL EtOAc. The organic layers were washed with 30 mL brine, dried over MgSO4, filtered and concentrated under vacuum. The compound was purified by silica gel chromatography on a 10 g column using an MPLC system (CombiFlash Companion, Isco Inc.) eluting with a gradient of n-heptane:EtOAc (100:0 to 0:100). Colorless solid (30 mg, 27%). MS (ESI): m/z=521.134 [M+H]+. by stirring for 18 hours at 80° C the layers were separated The aqueous layer was extracted a second time with 30 mL EtOAc The organic layers were washed with 30 mL brine dried over MgSO4 filtered concentrated under vacuum The compound was purified by silica gel chromatography on a 10 g column eluting with a gradient of n-heptane:EtOAc (100:0 to 0:100)

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

Procedure: To a solution of N-(4-(2-hydroxyphenyl)-6-methylpyridin-3-yl)-N-methyl-3-(methylsulfonyl)-5-(trifluoromethyl)benzamide (100 mg, 215 μmol) in DMF (2 mL) was added K2CO3 (59.5 mg, 431 μmol) and 3-iodooxetane (43.6 mg, 237 μmol). The reaction mixture was stirred for 2 hours at room temperature followed by stirring for 18 hours at 80° C. The reaction mixture was poured on 30 mL 10% aqueous NaHCO3 solution and 30 mL EtOAc and the layers were separated. The aqueous layer was extracted a second time with 30 mL EtOAc. The organic layers were washed with 30 mL brine, dried over MgSO4, filtered and concentrated under vacuum. The compound was purified by silica gel chromatography on a 10 g column using an MPLC system (CombiFlash Companion, Isco Inc.) eluting with a gradient of n-heptane:EtOAc (100:0 to 0:100). Colorless solid (30 mg, 27%). MS (ESI): m/z=521.134 [M+H]+. by stirring for 18 hours at 80° C the layers were separated The aqueous layer was extracted a second time with 30 mL EtOAc The organic layers were washed with 30 mL brine dried over MgSO4 filtered concentrated under vacuum The compound was purified by silica gel chromatography on a 10 g column eluting with a gradient of n-heptane:EtOAc (100:0 to 0:100)

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

Procedure: To a solution of N-(4-(4-fluoro-2-methoxyphenyl)-6-methylpyridin-3-yl)-3-mercapto-N-methyl-5-(trifluoromethyl)benzamide (0.093 g, 206 μmol) in acetonitrile (2 mL) were added 3-iodooxetane (57.0 mg, 310 μmol) and DIPEA (66.7 mg, 90.1 μL, 516 μmol) and the clear, light yellow solution was heated under reflux for 2.5 hours. The reaction mixture was poured on saturated aqueous NH4Cl solution and EtOAc and the layers were separated. The aqueous layer was extracted twice with EtOAc. The organic layers were dried over MgSO4, filtered, treated with silica gel and evaporated. The compound was purified by silica gel chromatography on a 10 g column using an MPLC system eluting with a gradient of n-heptane:EtOAc (100:0 to 0:100). Colorless foam (0.05 g; 47%). MS (ESI): m/z=507.14 [M+H]+. the clear, light yellow solution was heated under reflux for 2.5 hours the layers were separated The aqueous layer was extracted twice with EtOAc The organic layers were dried over MgSO4 filtered treated with silica gel evaporated The compound was purified by silica gel chromatography on a 10 g column eluting with a gradient of n-heptane:EtOAc (100:0 to 0:100)

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

Procedure: To a solution of N-(4-(4-fluoro-2-methoxyphenyl)-6-methylpyridin-3-yl)-3-mercapto-N-methyl-5-(trifluoromethyl)benzamide (0.093 g, 206 μmol) in acetonitrile (2 mL) were added 3-iodooxetane (57.0 mg, 310 μmol) and DIPEA (66.7 mg, 90.1 μL, 516 μmol) and the clear, light yellow solution was heated under reflux for 2.5 hours. The reaction mixture was poured on saturated aqueous NH4Cl solution and EtOAc and the layers were separated. The aqueous layer was extracted twice with EtOAc. The organic layers were dried over MgSO4, filtered, treated with silica gel and evaporated. The compound was purified by silica gel chromatography on a 10 g column using an MPLC system eluting with a gradient of n-heptane:EtOAc (100:0 to 0:100). Colorless foam (0.05 g; 47%). MS (ESI): m/z=507.14 [M+H]+. the clear, light yellow solution was heated under reflux for 2.5 hours the layers were separated The aqueous layer was extracted twice with EtOAc The organic layers were dried over MgSO4 filtered treated with silica gel evaporated The compound was purified by silica gel chromatography on a 10 g column eluting with a gradient of n-heptane:EtOAc (100:0 to 0:100)

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

Procedure: To a solution N-(4-(2-hydroxyphenyl)pyridin-3-yl)-N-methyl-3-(methylsulfonyl)-5-(trifluoromethyl)benzamide (100 mg, 222 μmol, example 263, intermediate a) in DMF (2 ml) was added K2CO3 (61.4 mg, 444 μmol) and 3-iodooxetane (44.9 mg, 244 μmol). The reaction mixture was stirred for 18 hours at 80° C. The reaction mixture was poured on 30 mL 10% aqueous NaHCO3 solution and 30 mL EtOAc and the layers were separated. The aqueous layer was extracted a second time with 30 mL EtOAc. The organic layers were washed with 30 mL brine, dried over MgSO4, filtered and concentrated under vacuum. The compound was purified by silica gel chromatography on a 20 g column using an MPLC (Flashmaster) system eluting with a gradient of n-heptane:EtOAc (100:0 to 0:100). Colorless foam (52 mg, 46%). MS (ESI): m/z=507.120 [M+H]+. the layers were separated The aqueous layer was extracted a second time with 30 mL EtOAc The organic layers were washed with 30 mL brine dried over MgSO4 filtered concentrated under vacuum The compound was purified by silica gel chromatography on a 20 g column eluting with a gradient of n-heptane:EtOAc (100:0 to 0:100)

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

Procedure: To a solution N-(4-(2-hydroxyphenyl)pyridin-3-yl)-N-methyl-3-(methylsulfonyl)-5-(trifluoromethyl)benzamide (100 mg, 222 μmol, example 263, intermediate a) in DMF (2 ml) was added K2CO3 (61.4 mg, 444 μmol) and 3-iodooxetane (44.9 mg, 244 μmol). The reaction mixture was stirred for 18 hours at 80° C. The reaction mixture was poured on 30 mL 10% aqueous NaHCO3 solution and 30 mL EtOAc and the layers were separated. The aqueous layer was extracted a second time with 30 mL EtOAc. The organic layers were washed with 30 mL brine, dried over MgSO4, filtered and concentrated under vacuum. The compound was purified by silica gel chromatography on a 20 g column using an MPLC (Flashmaster) system eluting with a gradient of n-heptane:EtOAc (100:0 to 0:100). Colorless foam (52 mg, 46%). MS (ESI): m/z=507.120 [M+H]+. the layers were separated The aqueous layer was extracted a second time with 30 mL EtOAc The organic layers were washed with 30 mL brine dried over MgSO4 filtered concentrated under vacuum The compound was purified by silica gel chromatography on a 20 g column eluting with a gradient of n-heptane:EtOAc (100:0 to 0:100)

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

Procedure: To a solution of N-(4-(4-fluoro-2-methoxyphenyl)pyridin-3-yl)-3-mercapto-N-methyl-5-(trifluoromethyl)benzamide (0.1 g, 229 μmol, example 129, intermediate) in acetonitrile (2 mL) were added 3-iodooxetane (52.7 mg, 286 μmol, CAS RN 26272-85-5) and DIPEA (74.0 mg, 100 μL, 573 μmol) and the yellow solution was stirred at room temperature for 1.5 hours. Then heating was installed and the yellow solution was stirred at reflux for 2.5 hours. The colorless solution was poured on saturated aqueous NH4Cl solution and EtOAc and the layers were separated. The aqueous layer was extracted twice with EtOAc. The organic layers were dried over MgSO4, filtered, and evaporated. The compound was purified by silica gel chromatography on a 10 g column using an MPLC system eluting with a gradient of n-heptane:EtOAc (100:0 to 0:100). Light brown foam (0.052 g; 46%). MS (ESI): m/z=493.12 [M+H]+. Then heating the yellow solution was stirred at reflux for 2.5 hours the layers were separated The aqueous layer was extracted twice with EtOAc The organic layers were dried over MgSO4 filtered evaporated The compound was purified by silica gel chromatography on a 10 g column eluting with a gradient of n-heptane:EtOAc (100:0 to 0:100)