1,2-dibromo-3,4-difluorobenzene

反応条件: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To 3,4-difluoro-1,2-dibromo-benzene (0.75 g, 2.78 mmol) and furan (1 mL, 14.7 mmol) in Et2O (15 mL) at −78° C. was added BuLi (1.1 mL, 2.5M in hexanes, 2.75 mmol) dropwise. The reaction was stirred for two hours at −78° C. and then was allowed to warm to room temperature. After 2 hours, the reaction mixture was quenched with water dropwise and then was poured into water. The organic layer was separated and the aqueous layer was extracted three times with Et2O. The combined organic layers were washed with brine, dried over MgSO4, concentrated and chromatographed (25% ethyl acetate:hexanes) on silica gel to give 24 (350 mg, 70%) as a colourless oil. Rf=0.21 on silica gel (20% ethyl acetate:hexanes); bp 40° C. @ 0.5 mmHg]; IR (neat, cm−1), 3017 (M), 1624 (s), 1465 (s), 1365 (s), 1253 (s), 1190 (m), 1040 (s), 857 (s). 1H NMR (400Mz, CDCl3) δ 7.06 (2H, dd, JH-F=7.7, 7.7 Hz), 7.01 (2H, s), 5.67 (2H, s); 13C NMR (400 MHz, CDCl3) δ 147.2 (dd, JC-F=247.9, 14.5 Hz), 145.1 (dd, JC-F=4.3, 4.3 Hz), 143.1, 110.8 (m), 82.1.HRMS calcd for C10H6O (M+): 180.0387. Found: 180.0394. to warm to room temperature After 2 hours the reaction mixture was quenched with water dropwise was poured into water The organic layer was separated the aqueous layer was extracted three times with Et2O The combined organic layers were washed with brine dried over MgSO4 concentrated chromatographed (25% ethyl acetate:hexanes) on silica gel

反応条件: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To 3,4-difluoro-1,2-dibromo-benzene (0.75 g, 2.78 mmol) and furan (1 mL, 14.7 mmol) in Et2O (15 mL) at −78° C. was added BuLi (1.1 mL, 2.5M in hexanes, 2.75 mmol) dropwise. The reaction was stirred for two hours at −78° C. and then was allowed to warm to room temperature. After 2 hours, the reaction mixture was quenched with water dropwise and then was poured into water. The organic layer was separated and the aqueous layer was extracted three times with Et2O. The combined organic layers were washed with brine, dried over MgSO4, concentrated and chromatographed (25% ethyl acetate:hexanes) on silica gel to give 24 (350 mg, 70%) as a colourless oil. Rf=0.21 on silica gel (20% ethyl acetate:hexanes); bp 40° C. @ 0.5 mmHg]; IR (neat, cm−1), 3017 (M), 1624 (s), 1465 (s), 1365 (s), 1253 (s), 1190 (m), 1040 (s), 857 (s). 1H NMR (400 MHz, CDCl3) δ7.06 (2H, dd, JH-F=7.7, 7.7 Hz), 7.01 (2H, s), 5.67 (2H, s); 13C NMR (400 MHz, CDCl3) δ147.2 (dd, JC-F=247.9, 14.5 Hz), 145.1 (dd, JC-F=4.3, 4.3 Hz), 143.1, 110.8 (m), 82.1. HRMS calcd for C10H6O (M+): 180.0387. Found: 180.0394. to warm to room temperature After 2 hours the reaction mixture was quenched with water dropwise was poured into water The organic layer was separated the aqueous layer was extracted three times with Et2O The combined organic layers were washed with brine dried over MgSO4 concentrated chromatographed (25% ethyl acetate:hexanes) on silica gel

反応条件: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To 3,4-difluoro-1,2-dibromo-benzene (0.75 g, 2.78 mmol) and furan (1 mL, 14.7 mmol) in Et2O (15 mL) at −78° C. was added BuLi (1.1 mL, 2.5M in hexanes, 2.75 mmol) dropwise. The reaction was stirred for two hours at −78° C. and then was allowed to warm to room temperature. After 2 hours, the reaction mixture was quenched with water dropwise and then was poured into water. The organic layer was separated and the aqueous layer was extracted three times with Et2O. The combined organic layers were washed with brine, dried over MgSO4, concentrated and chromatographed (25% ethyl acetate:hexanes) on silica gel to give 24 (350 mg, 70%) as a colourless oil. Rf=0.21 on silica gel (20% ethyl acetate:hexanes); bp 40° C. @ 0.5 mmHg]; IR (neat, cm−1), 3017 (M), 1624 (s), 1465 (s), 1365 (s), 1253 (s), 1190 (m), 1040 (s), 857 (s). 1H NMR (400Mz, CDCl3) δ 7.06 (2H, dd, JH-F=7.7, 7.7 Hz), 7.01 (2H, s), 5.67 (2H, s); 13C NMR (400 MHz, CDCl3) δ 147.2 (dd, JC-F=247.9, 14.5 Hz), 145.1 (dd, JC-F=4.3, 4.3 Hz), 143.1, 110.8 (m), 82.1.HRMS calcd for C10H6O (M+): 180.0387. Found: 180.0394. to warm to room temperature After 2 hours the reaction mixture was quenched with water dropwise was poured into water The organic layer was separated the aqueous layer was extracted three times with Et2O The combined organic layers were washed with brine dried over MgSO4 concentrated chromatographed (25% ethyl acetate:hexanes) on silica gel

反応条件: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To 3,4-difluoro-1,2-dibromo-benzene (0.75 g, 2.78 mmol) and furan (1 mL, 14.7 mmol) in Et2O (15 mL) at −78° C. was added BuLi (1.1 mL, 2.5M in hexanes, 2.75 mmol) dropwise. The reaction was stirred for two hours at −78° C. and then was allowed to warm to room temperature. After 2 hours, the reaction mixture was quenched with water dropwise and then was poured into water. The organic layer was separated and the aqueous layer was extracted three times with Et2O. The combined organic layers were washed with brine, dried over MgSO4, concentrated and chromatographed (25% ethyl acetate:hexanes) on silica gel to give 24 (350 mg, 70%) as a colourless oil. Rf=0.21 on silica gel (20% ethyl acetate:hexanes); bp 40° C. @ 0.5 mmHg]; IR (neat, cm−1), 3017 (M), 1624 (s), 1465 (s), 1365 (s), 1253 (s), 1190 (m), 1040 (s), 857 (s). 1H NMR (400Mz, CDCl3) δ 7.06 (2H, dd, JH-F=7.7, 7.7 Hz), 7.01 (2H, s), 5.67 (2H, s); 13C NMR (400 MHz, CDCl3) δ 147.2 (dd, JC-F=247.9, 14.5 Hz), 145.1 (dd, JC-F=4.3, 4.3 Hz), 143.1, 110.8 (m), 82.1.HRMS calcd for C10H6O (M+): 180.0387. Found: 180.0394. to warm to room temperature After 2 hours the reaction mixture was quenched with water dropwise was poured into water The organic layer was separated the aqueous layer was extracted three times with Et2O The combined organic layers were washed with brine dried over MgSO4 concentrated chromatographed (25% ethyl acetate:hexanes) on silica gel

反応条件: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To 3,4-difluoro-1,2-dibromo-benzene (0.75 g, 2.78 mmol) and furan (1 mL, 14.7 mmol) in Et2O (15 mL) at −78° C. was added BuLi (1.1 mL, 2.5M in hexanes, 2.75 mmol) dropwise. The reaction was stirred for two hours at −78° C. and then was allowed to warm to room temperature. After 2 hours, the reaction mixture was quenched with water dropwise and then was poured into water. The organic layer was separated and the aqueous layer was extracted three times with Et2O. The combined organic layers were washed with brine, dried over MgSO4, concentrated and chromatographed (25% ethyl acetate:hexanes) on silica gel to give 24 (350 mg, 70%) as a colourless oil. Rf=0.21 on silica gel (20% ethyl acetate:hexanes); bp 40° C. @ 0.5 mmHg]; IR (neat, cm−1), 3017 (M), 1624 (s), 1465 (s), 1365 (s), 1253 (s), 1190 (m), 1040 (s), 857 (s). 1H NMR (400 MHz, CDCl3) δ 7.06 (2H, dd, JH−F=7.7, 7.7 Hz), 7.01 (2H, s), 5.67 (2H, s); 13C NMR (400 MHz, CDCl3) δ 147.2 (dd, JC−F=247.9, 14.5 Hz), 145.1 (dd, JC−F=4.3, 4.3 Hz), 143.1, 110.8 (m), 82.1. HRMS calcd for C10H6O (M+): 180.0387. Found: 180.0394. to warm to room temperature After 2 hours the reaction mixture was quenched with water dropwise was poured into water The organic layer was separated the aqueous layer was extracted three times with Et2O The combined organic layers were washed with brine dried over MgSO4 concentrated chromatographed (25% ethyl acetate:hexanes) on silica gel

反応条件: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To 3,4-difluoro-1,2-dibromo-benzene (0.75 g, 2.78 mmol) and furan (1 mL, 14.7 mmol) in Et2O (15 mL) at −78° C. was added BuLi (1.1 mL, 2.5M in hexanes, 2.75 mmol) dropwise. The reaction was stirred for two hours at −78° C. and then was allowed to warm to room temperature. After 2 hours, the reaction mixture was quenched with water dropwise and then was poured into water. The organic layer was separated and the aqueous layer was extracted three times with Et2O. The combined organic layers were washed with brine, dried over MgSO4, concentrated and chromatographed (25% ethyl acetate:hexanes) on silica gel to give 24 (350 mg, 70%) as a colourless oil. Rf=0.21 on silica gel (20% ethyl acetate:hexanes); bp 40° C. @ 0.5 mmHg]; IR (neat, cm−1), 3017 (M), 1624 (s), 1465 (s), 1365 (s), 1253 (s), 1190 (m), 1040 (s), 857 (s). 1H NMR (400 MHz, CDCl3) δ7.06 (2H, dd, JH-F=7.7, 7.7 Hz), 7.01 (2H, s), 5.67 (2H, s); 13C NMR (400 MHz, CDCl3) δ147.2 (dd, JC-F=247.9, 14.5 Hz), 145.1 (dd, JC-F=4.3, 4.3 Hz), 143.1, 110.8 (m), 82.1. HRMS calcd for C10H6O (M+): 180.0387. Found: 180.0394. to warm to room temperature After 2 hours the reaction mixture was quenched with water dropwise was poured into water The organic layer was separated the aqueous layer was extracted three times with Et2O The combined organic layers were washed with brine dried over MgSO4 concentrated chromatographed (25% ethyl acetate:hexanes) on silica gel