2-氯-5-氟苄醇

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of (2-chloro-5-fluorophenyl)methanol (24, 25.5 g, 159 mmol) in dry DME (200 mL) at 0° C. was added a solution of PBr3 (25.8 g, 95.2 mmol) in dry DME (150 mL) dropwise. The mixture was then slowly warmed up to RT and stirred at RT for another 3 h. The mixture was diluted with water (300 mL), and extracted with 1:1 petroleum-ether-EtOAc (200 mL×2). The combined extracts were washed with saturated NaHCO3 and brine, dried over MgSO4, and concentrated to give 2-(bromomethyl)-1-chloro-4-fluorobenzene (25). extracted with 1:1 petroleum-ether-EtOAc (200 mL×2) The combined extracts were washed with saturated NaHCO3 and brine dried over MgSO4 concentrated

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of methyl 2-chloro-5-fluorobenzoate (23, 35.0 g, 185.6 mmol) in dry THF (150 mL) was added NaBH4 (21.2 g, 557 mmol). Methanol (40 mL) was added dropwise at RT. After the addition, the mixture was stirred at RT for 1 h. Water (300 mL) was slowly added. The mixture was extracted with CH2Cl2 (200 mL×2). The combined extracts were washed with saturated NaHCO3 and brine, dried over MgSO4, and concentrated to give (2-chloro-5-fluorophenyl)methanol (24). After the addition The mixture was extracted with CH2Cl2 (200 mL×2) The combined extracts were washed with saturated NaHCO3 and brine dried over MgSO4 concentrated

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of (2-chloro-5-fluoro-phenyl)-methanol (5.0 g, 31.1 mmol) in dichloromethane (40 mL) was added drop wise phosphorus tribromide (87 g, 31.1 mmol). The mixture was stirred at room temperature for 16 h. The reaction was poured onto ice/water. The aqueous phase was made basic with sodium bicarbonate. The aqueous phase was extracted with dichloromethane. The organic phase was concentrated under reduced pressure. The residue was purified by silica gel chromatography eluting with (hexanes/ethyl acetate 90:10) to give the title compound (5.75 g, 82.5%). The reaction was poured onto ice/water The aqueous phase was extracted with dichloromethane The organic phase was concentrated under reduced pressure The residue was purified by silica gel chromatography eluting with (hexanes/ethyl acetate 90:10)

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of (2-chloro-5-fluorophenyl)methanol (24, 25.5 g, 159 mmol) in dry DME (200 mL) at 0° C. was added a solution of PBr3 (25.8 g, 95.2 mmol) in dry DME (150 mL) dropwise. The mixture was then slowly warmed up to RT and stirred at RT for another 3 h. The mixture was diluted with water (300 mL), and extracted with 1:1 petroleum-ether-EtOAc (200 mL×2). The combined extracts were washed with saturated NaHCO3 and brine, dried over MgSO4, and concentrated to give 2-(bromomethyl)-1-chloro-4-fluorobenzene (25). extracted with 1:1 petroleum-ether-EtOAc (200 mL×2) The combined extracts were washed with saturated NaHCO3 and brine dried over MgSO4 concentrated

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of methyl 2-chloro-5-fluorobenzoate (23, 35.0 g, 185.6 mmol) in dry THF (150 mL) was added NaBH4 (21.2 g, 557 mmol). Methanol (40 mL) was added dropwise at RT. After the addition, the mixture was stirred at RT for 1 h. Water (300 mL) was slowly added. The mixture was extracted with CH2Cl2 (200 mL×2). The combined extracts were washed with saturated NaHCO3 and brine, dried over MgSO4, and concentrated to give (2-chloro-5-fluorophenyl)methanol (24). After the addition The mixture was extracted with CH2Cl2 (200 mL×2) The combined extracts were washed with saturated NaHCO3 and brine dried over MgSO4 concentrated

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of methyl 2-chloro-5-fluorobenzoate (23, 35.0 g, 185.6 mmol) in dry THF (150 mL) was added NaBH4 (21.2 g, 557 mmol). Methanol (40 mL) was added dropwise at RT. After the addition, the mixture was stirred at RT for 1 h. Water (300 mL) was slowly added. The mixture was extracted with CH2Cl2 (200 mL×2). The combined extracts were washed with saturated NaHCO3 and brine, dried over MgSO4, and concentrated to give (2-chloro-5-fluorophenyl)methanol (24). After the addition The mixture was extracted with CH2Cl2 (200 mL×2) The combined extracts were washed with saturated NaHCO3 and brine dried over MgSO4 concentrated

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of (2-chloro-5-fluorophenyl)methanol (24, 25.5 g, 159 mmol) in dry DME (200 mL) at 0° C. was added a solution of PBr3 (25.8 g, 95.2 mmol) in dry DME (150 mL) dropwise. The mixture was then slowly warmed up to RT and stirred at RT for another 3 h. The mixture was diluted with water (300 mL), and extracted with 1:1 petroleum-ether-EtOAc (200 mL×2). The combined extracts were washed with saturated NaHCO3 and brine, dried over MgSO4, and concentrated to give 2-(bromomethyl)-1-chloro-4-fluorobenzene (25). extracted with 1:1 petroleum-ether-EtOAc (200 mL×2) The combined extracts were washed with saturated NaHCO3 and brine dried over MgSO4 concentrated

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of methyl 2-chloro-5-fluorobenzoate (23, 35.0 g, 185.6 mmol) in dry THF (150 mL) was added NaBH4 (21.2 g, 557 mmol). Methanol (40 mL) was added dropwise at RT. After the addition, the mixture was stirred at RT for 1 h. Water (300 mL) was slowly added. The mixture was extracted with CH2Cl2 (200 mL×2). The combined extracts were washed with saturated NaHCO3 and brine, dried over MgSO4, and concentrated to give (2-chloro-5-fluorophenyl)methanol (24). After the addition The mixture was extracted with CH2Cl2 (200 mL×2) The combined extracts were washed with saturated NaHCO3 and brine dried over MgSO4 concentrated

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of (2-chloro-5-fluoro-phenyl)-methanol (5.0 g, 31.1 mmol) in dichloromethane (40 mL) was added drop wise phosphorus tribromide (87 g, 31.1 mmol). The mixture was stirred at room temperature for 16 h. The reaction was poured onto ice/water. The aqueous phase was made basic with sodium bicarbonate. The aqueous phase was extracted with dichloromethane. The organic phase was concentrated under reduced pressure. The residue was purified by silica gel chromatography eluting with (hexanes/ethyl acetate 90:10) to give the title compound (5.75 g, 82.5%). The reaction was poured onto ice/water The aqueous phase was extracted with dichloromethane The organic phase was concentrated under reduced pressure The residue was purified by silica gel chromatography eluting with (hexanes/ethyl acetate 90:10)

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of (2-chloro-5-fluorophenyl)methanol (24, 25.5 g, 159 mmol) in dry DME (200 mL) at 0° C. was added a solution of PBr3 (25.8 g, 95.2 mmol) in dry DME (150 mL) dropwise. The mixture was then slowly warmed up to RT and stirred at RT for another 3 h. The mixture was diluted with water (300 mL), and extracted with 1:1 petroleum-ether-EtOAc (200 mL×2). The combined extracts were washed with saturated NaHCO3 and brine, dried over MgSO4, and concentrated to give 2-(bromomethyl)-1-chloro-4-fluorobenzene (25). extracted with 1:1 petroleum-ether-EtOAc (200 mL×2) The combined extracts were washed with saturated NaHCO3 and brine dried over MgSO4 concentrated

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of methyl 2-chloro-5-fluorobenzoate (23, 35.0 g, 185.6 mmol) in dry THF (150 mL) was added NaBH4 (21.2 g, 557 mmol). Methanol (40 mL) was added dropwise at RT. After the addition, the mixture was stirred at RT for 1 h. Water (300 mL) was slowly added. The mixture was extracted with CH2Cl2 (200 mL×2). The combined extracts were washed with saturated NaHCO3 and brine, dried over MgSO4, and concentrated to give (2-chloro-5-fluorophenyl)methanol (24). After the addition The mixture was extracted with CH2Cl2 (200 mL×2) The combined extracts were washed with saturated NaHCO3 and brine dried over MgSO4 concentrated

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of (2-chloro-5-fluorophenyl)methanol (24, 25.5 g, 159 mmol) in dry DME (200 mL) at 0° C. was added a solution of PBr3 (25.8 g, 95.2 mmol) in dry DME (150 mL) dropwise. The mixture was then slowly warmed up to RT and stirred at RT for another 3 h. The mixture was diluted with water (300 mL), and extracted with 1:1 petroleum-ether-EtOAc (200 mL×2). The combined extracts were washed with saturated NaHCO3 and brine, dried over MgSO4, and concentrated to give 2-(bromomethyl)-1-chloro-4-fluorobenzene (25). extracted with 1:1 petroleum-ether-EtOAc (200 mL×2) The combined extracts were washed with saturated NaHCO3 and brine dried over MgSO4 concentrated