3-bromo-2H-furan-5-one

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a 0° C. stirred solution of 6-fluorooxindole (370 mg, 2.45 mmol) in anhydrous THF (10 mL) was added 1M LiHMDS/THF solution (4.9 mL, 4.9 mmol). The mixture was stirred at 0° C. for 10 minutes. 4-Bromo-5H-furan-2-one (200 mg, 1.23) was added as a solution in 2 mL of THF. The resulting mixture was stirred at 0° C. for 30 minutes, then at room temperature for 1 hour and quenched with 10 mL of 2M HCl. Methanol (5 mL) was added and the mixture was stirred at 50° C. for 0.5 hour. The mixture was poured into 150 mL of water and then stirred for 30 minutes. The precipitates were filtered, washed with water, and dried in vacuum to give 3-(4-bromo-5H-furan-2-ylidene)-6-fluoro-1,3-dihydro-indol-2-one as a yellow solid. Yield: 228 mg, 63%. The resulting mixture was stirred at 0° C. for 30 minutes at room temperature for 1 hour quenched with 10 mL of 2M HCl Methanol (5 mL) was added the mixture was stirred at 50° C. for 0.5 hour The mixture was poured into 150 mL of water stirred for 30 minutes The precipitates were filtered washed with water dried in vacuum

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a 0° C. stirred solution of 6-fluorooxindole (370 mg, 2.45 mmol) in anhydrous THF (10 mL) was added 1M LiHMDS/THF solution (4.9 mL, 4.9 mmol). The mixture was stirred at 0° C. for 10 minutes. 4-Bromo-5H-furan-2-one (200 mg, 1.23) was added as a solution in 2 mL of THF. The resulting mixture was stirred at 0° C. for 30 minutes, then at room temperature for 1 hour and quenched with 10 mL of 2M HCl. Methanol (5 mL) was added and the mixture was stirred at 50° C. for 0.5 hour. The mixture was poured into 150 mL of water and then stirred for 30 minutes. The precipitates were filtered, washed with water, and dried in vacuum to give 3-(4-bromo-5H-furan-2-ylidene)-6-fluoro-1,3-dihydro-indol-2-one as a yellow solid. Yield: 228 mg, 63%. The resulting mixture was stirred at 0° C. for 30 minutes at room temperature for 1 hour quenched with 10 mL of 2M HCl Methanol (5 mL) was added the mixture was stirred at 50° C. for 0.5 hour The mixture was poured into 150 mL of water stirred for 30 minutes The precipitates were filtered washed with water dried in vacuum

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a 0° C. stirred solution of 6-fluorooxindole (370 mg, 2.45 mmol) in anhydrous THF (10 mL) was added 1M LiHMDS/THF solution (4.9 mL, 4.9 mmol). The mixture was stirred at 0° C. for 10 minutes. 4-Bromo-5H-furan-2-one (200 mg, 1.23) was added as a solution in 2 mL of THF. The resulting mixture was stirred at 0° C. for 30 minutes, then at room temperature for 1 hour and quenched with 10 mL of 2M HCl. Methanol (5 mL) was added and the mixture was stirred at 50° C. for 0.5 hour. The mixture was poured into 150 mL of water and then stirred for 30 minutes. The precipitates were filtered, washed with water, and dried in vacuum to give 3-(4-bromo-5H-furan-2-ylidene)-6-fluoro-1,3-dihydro-indol-2-one as a yellow solid. Yield: 228 mg, 63%. The resulting mixture was stirred at 0° C. for 30 minutes at room temperature for 1 hour quenched with 10 mL of 2M HCl Methanol (5 mL) was added the mixture was stirred at 50° C. for 0.5 hour The mixture was poured into 150 mL of water stirred for 30 minutes The precipitates were filtered washed with water dried in vacuum

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a 0° C. stirred solution of 6-fluorooxindole (370 mg, 2.45 mmol) in anhydrous THF (10 mL) was added 1M LiHMDS/THF solution (4.9 mL, 4.9 mmol). The mixture was stirred at 0° C. for 10 minutes. 4-Bromo-5H-furan-2-one (200 mg, 1.23) was added as a solution in 2 mL of THF. The resulting mixture was stirred at 0° C. for 30 minutes, then at room temperature for 1 hour and quenched with 10 mL of 2M HCl. Methanol (5 mL) was added and the mixture was stirred at 50° C. for 0.5 hour. The mixture was poured into 150 mL of water and then stirred for 30 minutes. The precipitates were filtered, washed with water, and dried in vacuum to give 3-(4-bromo-5H-furan-2-ylidene)-6-fluoro-1,3-dihydro-indol-2-one as a yellow solid. Yield: 228 mg, 63%. The resulting mixture was stirred at 0° C. for 30 minutes at room temperature for 1 hour quenched with 10 mL of 2M HCl Methanol (5 mL) was added the mixture was stirred at 50° C. for 0.5 hour The mixture was poured into 150 mL of water stirred for 30 minutes The precipitates were filtered washed with water dried in vacuum

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a 0° C. stirred solution of 6-fluorooxindole (370 mg, 2.45 mmol) in anhydrous THF (10 mL) was added 1M LiHMDS/THF solution (4.9 mL, 4.9 mmol). The mixture was stirred at 0° C. for 10 minutes. 4-Bromo-5H-furan-2-one (200 mg, 1.23) was added as a solution in 2 mL of THF. The resulting mixture was stirred at 0° C. for 30 minutes, then at room temperature for 1 hour and quenched with 10 mL of 2M HCl. Methanol (5 mL) was added and the mixture was stirred at 50° C. for 0.5 hour. The mixture was poured into 150 mL of water and then stirred for 30 minutes. The precipitates were filtered, washed with water, and dried in vacuum to give 3-(4-bromo-5H-furan-2-ylidene)-6-fluoro-1,3-dihydro-indol-2-one as a yellow solid. Yield: 228 mg, 63%. The resulting mixture was stirred at 0° C. for 30 minutes at room temperature for 1 hour quenched with 10 mL of 2M HCl Methanol (5 mL) was added the mixture was stirred at 50° C. for 0.5 hour The mixture was poured into 150 mL of water stirred for 30 minutes The precipitates were filtered washed with water dried in vacuum

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a 0° C. stirred solution of 6-fluorooxindole (370 mg, 2.45 mmol) in anhydrous THF (10 mL) was added 1M LiHMDS/THF solution (4.9 mL, 4.9 mmol). The mixture was stirred at 0° C. for 10 minutes. 4-Bromo-5H-furan-2-one (200 mg, 1.23) was added as a solution in 2 mL of THF. The resulting mixture was stirred at 0° C. for 30 minutes, then at room temperature for 1 hour and quenched with 10 mL of 2M HCl. Methanol (5 mL) was added and the mixture was stirred at 50° C. for 0.5 hour. The mixture was poured into 150 mL of water and then stirred for 30 minutes. The precipitates were filtered, washed with water, and dried in vacuum to give 3-(4-bromo-5H-furan-2-ylidene)-6-fluoro-1,3-dihydro-indol-2-one as a yellow solid. Yield: 228 mg, 63%. The resulting mixture was stirred at 0° C. for 30 minutes at room temperature for 1 hour quenched with 10 mL of 2M HCl Methanol (5 mL) was added the mixture was stirred at 50° C. for 0.5 hour The mixture was poured into 150 mL of water stirred for 30 minutes The precipitates were filtered washed with water dried in vacuum

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a 0° C. stirred solution of 6-fluorooxindole (370 mg, 2.45 mmol) in anhydrous THF (10 mL) was added 1M LiHMDS/THF solution (4.9 mL, 4.9 mmol). The mixture was stirred at 0° C. for 10 minutes. 4-Bromo-5H-furan-2-one (200 mg, 1.23) was added as a solution in 2 mL of THF. The resulting mixture was stirred at 0° C. for 30 minutes, then at room temperature for 1 hour and quenched with 10 mL of 2M HCl. Methanol (5 mL) was added and the mixture was stirred at 50° C. for 0.5 hour. The mixture was poured into 150 mL of water and then stirred for 30 minutes. The precipitates were filtered, washed with water, and dried in vacuum to give 3-(4-bromo-5H-furan-2-ylidene)-6-fluoro-1,3-dihydro-indol-2-one as a yellow solid. Yield: 228 mg, 63%. The resulting mixture was stirred at 0° C. for 30 minutes at room temperature for 1 hour quenched with 10 mL of 2M HCl Methanol (5 mL) was added the mixture was stirred at 50° C. for 0.5 hour The mixture was poured into 150 mL of water stirred for 30 minutes The precipitates were filtered washed with water dried in vacuum

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

Procedure: To 0.040 g (0.13 mmol) (S)-1-{4-[3-(4-ethoxy-phenoxy)-azetidin-1-yl]-phenyl}-ethylamine (X.1) in 1.5 mL THF are added 54 μL (0.38 mmol) TEA and 0.021 g (0.13 mmol) 4-bromo-2(5H)-furanone. The mixture is stirred for 12 h at 80° C. After concentration in vacuo the residue is purified by HPLC (SunfireC18, MeOH/water (+0.3% formic acid)) to yield the desired product. After concentration in vacuo the residue is purified by HPLC (SunfireC18, MeOH/water (+0.3% formic acid))

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

Procedure: To 0.040 g (0.13 mmol) (S)-1-{4-[3-(4-ethoxy-phenoxy)-azetidin-1-yl]-phenyl}-ethylamine (X.1) in 1.5 mL THF are added 54 μL (0.38 mmol) TEA and 0.021 g (0.13 mmol) 4-bromo-2(5H)-furanone. The mixture is stirred for 12 h at 80° C. After concentration in vacuo the residue is purified by HPLC (SunfireC18, MeOH/water (+0.3% formic acid)) to yield the desired product. After concentration in vacuo the residue is purified by HPLC (SunfireC18, MeOH/water (+0.3% formic acid))

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a 0° C. stirred solution of 6-fluorooxindole (370 mg, 2.45 mmol) in anhydrous THF (10 mL) was added 1M LiHMDS/THF solution (4.9 mL, 4.9 mmol). The mixture was stirred at 0° C. for 10 minutes. 4-Bromo-5H-furan-2-one (200 mg, 1.23) was added as a solution in 2 mL of THF. The resulting mixture was stirred at 0° C. for 30 minutes, then at room temperature for 1 hour and quenched with 10 mL of 2M HCl. Methanol (5 mL) was added and the mixture was stirred at 50° C. for 0.5 hour. The mixture was poured into 150 mL of water and then stirred for 30 minutes. The precipitates were filtered, washed with water, and dried in vacuum to give 3-(4-bromo-5H-furan-2-ylidene)-6-fluoro-1,3-dihydro-indol-2-one as a yellow solid. Yield: 228 mg, 63%. The resulting mixture was stirred at 0° C. for 30 minutes at room temperature for 1 hour quenched with 10 mL of 2M HCl Methanol (5 mL) was added the mixture was stirred at 50° C. for 0.5 hour The mixture was poured into 150 mL of water stirred for 30 minutes The precipitates were filtered washed with water dried in vacuum

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

Procedure: To a round bottom flask was charged tert-butyl 4-hydroxy-3-methyl-1-oxo-2,8-diazaspiro[4.5]decane-8-carboxylate (1000 mg, 3.52 mmol), 4-bromofuran-2(5H)-one (860 mg, 5.28 mmol), Pd(OAc)2 (79 mg, 0.352 mmol), Xantphos (305 mg, 0.528 mmol), and K2CO3 (972 mg, 7.03 mmol). The flask was sealed, vacuumed and back filled with N2 and filled with dioxane (14 mL) and water (190 μL, 10.6 mmol). The reaction mixture was heated at 90° C. overnight, and filtered through CELITE®. The filtrate was evaporated to give the crude product, which was purified by column chromatography (0-10% MeOH/DCM, came out at 6% MeOH/DCM, followed by another column with 0-100% EtOAc/hex) to give the title compound. LC/MS: [(M+1)]+=367 The flask was sealed filtered through CELITE® The filtrate was evaporated to give the crude product, which was purified by column chromatography (0-10% MeOH/DCM

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

Procedure: To a round bottom flask was charged tert-butyl 4-hydroxy-1-oxo-2,8-diazaspiro[4.5]decane-8-carboxylate (300 mg, 1.11 mmol), 4-bromofuran-2(5H)-one (271 mg, 1.66 mmol), Pd(OAc)2 (24.9 mg, 0.111 mmol), Xantphos (96 mg, 0.166 mmol), and K2CO3 (307 mg, 2.22 mmol). The flask was sealed, vacuumed and back filled with N2 and filled with dioxane (4.5 mL) and H2O (60.0 μL, 3.33 mmol). The reaction mixture was heated at 90° C. overnight, then filtered through CELITE®, and evaporated to give the crude product, which was purified by column chromatography (0-10% MeOH/DCM) to give the title compound. LC/MS: [(M+1)]+=353 The flask was sealed filtered through CELITE® evaporated to give the crude product, which was purified by column chromatography (0-10% MeOH/DCM)