4-bromo-7-fluoro-2,3-dihydroinden-1-one

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

Procedure: Triethylamine (26.2 mL, 187 mmol) is dissolved in dichloromethane (100 mL) and cooled to 0° C. then formic acid (7.96 mL, 211 mmol) is added dropwise with cooling. 4-Bromo-7-fluoro-indan-1-one (European patent EP2042480, 13.8 g, 60 mmol) is added and the mixture degassed with a flow of argon. Chloro([1S,2S)-(+2-amino-1,2-diphenylethyl](4-toluenesulfonyl)amido)(mesitylene)ruthenium(II) complex (375 mg, 0.6 mmol) is added and the mixture is stirred overnight at room temperature. Water is added, the mixture shaken and the phases separated. The organic phase is dried and concentrated under vacuum. The residue is purified by flash chromatography (0-20% ethyl acetate in cyclohexane) to give the title compound (Yield 13.1 g). GC (METHOD 1): tR=9.35 min; Mass spectrum (EI+): m/z=229, 231 [M]+, e.e. 100% by chiral HPLC (Column: Daicel Chiralcel OJ-H, 4.6×250 mm, 5 μm Mobile phase: hexane:ethanol 95:5, 1 mL/min, 25° C.) tR=9.87 min. with cooling the mixture degassed with a flow of argon Chloro([1S,2S)-(+2-amino-1,2-diphenylethyl](4-toluenesulfonyl)amido)(mesitylene)ruthenium(II) complex (375 mg, 0.6 mmol) is added the mixture shaken the phases separated The organic phase is dried concentrated under vacuum The residue is purified by flash chromatography (0-20% ethyl acetate in cyclohexane)

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

Procedure: Triethylamine (26.2 mL, 187 mmol) is dissolved in dichloromethane (100 mL) and cooled to 0° C. then formic acid (7.96 mL, 211 mmol) is added dropwise with cooling. 4-Bromo-7-fluoro-indan-1-one (European patent EP2042480, 13.8 g, 60 mmol) is added and the mixture degassed with a flow of argon. Chloro([1S,2S)-(+2-amino-1,2-diphenylethyl](4-toluenesulfonyl)amido)(mesitylene)ruthenium(II) complex (375 mg, 0.6 mmol) is added and the mixture is stirred overnight at room temperature. Water is added, the mixture shaken and the phases separated. The organic phase is dried and concentrated under vacuum. The residue is purified by flash chromatography (0-20% ethyl acetate in cyclohexane) to give the title compound (Yield 13.1 g). GC (METHOD 1): tR=9.35 min; Mass spectrum (EI+): m/z=229, 231 [M]+, e.e. 100% by chiral HPLC (Column: Daicel Chiralcel OJ-H, 4.6×250 mm, 5 μm Mobile phase: hexane:ethanol 95:5, 1 mL/min, 25° C.) tR=9.87 min. with cooling the mixture degassed with a flow of argon Chloro([1S,2S)-(+2-amino-1,2-diphenylethyl](4-toluenesulfonyl)amido)(mesitylene)ruthenium(II) complex (375 mg, 0.6 mmol) is added the mixture shaken the phases separated The organic phase is dried concentrated under vacuum The residue is purified by flash chromatography (0-20% ethyl acetate in cyclohexane)

Conditions: temp:65.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a room temperature solution of aluminum chloride (11.77 g, 88 mmol) in dichloroethane (100 mL) was added 7-fluoro-2,3-dihydro-1H-inden-1-one (5.3 g, 35.3 mmol) followed with bromine (1.91 mL, 37.1 mmol). The mixture was heated at 65° C. for 16 hours, then cooled to ambient temperature and poured into a mixture of ice and HCl (1N aqueous). The mixture was extracted twice with ether (200 mL). The combined organic extracts were dried (MgSO4), filtered, and concentrated under reduced pressure. The residue was purified by chromatography (silica gel column eluting with 0-10% EtOAc/hexanes) to provide the title compound (5.2 g, 64%). MS (DCI/NH3) m/z 246 (M+NH4)+. cooled to ambient temperature The mixture was extracted twice with ether (200 mL) The combined organic extracts were dried (MgSO4) filtered concentrated under reduced pressure The residue was purified by chromatography (silica gel column eluting with 0-10% EtOAc/hexanes)

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

Procedure: Reaction under argon atmosphere: to a mixture of 1.69 g (43.7 mmol) of sodium borohydride in 120 ml isopropyl alcohol is added 20.0 g (87.3 mmol) of 4-bromo-7-fluoro-1-indanone portionwise. The reaction mixture is stirred at r.t. for 2 h. The solvent is evaporated. To the residue are added 100 g ice and 200 ml 1N aq. HCl. The mixture is extracted with EtOAc. The combined organic layers are washed with brine, dried and the solvent is evaporated. The residue is chromatographed on silica gel (PE/EtOAc=100/0→70/30) to give the title compound. Yield: 15.4 g; LC (method 4): tR=3.05 min; Mass spectrum (ESI+): m/z=213 [M+H—H2O]+. Reaction under argon atmosphere The solvent is evaporated To the residue are added 100 g ice and 200 ml 1N aq. HCl The mixture is extracted with EtOAc The combined organic layers are washed with brine dried the solvent is evaporated The residue is chromatographed on silica gel (PE/EtOAc=100/0→70/30)

Conditions: temp:40.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 20.0 g (87.3 mmol) 4-bromo-7-fluoro-2,3-dihydro-1H-inden-1-one, 142 ml toluene and 13.9 g (138 mmol) TEA are added into a vessel. The mixture is degassed and heated to 40° C. Then, 272 mg (0.44 mmol) chloro{[(1S,2S)-(−)-2-amino-1,2-diphenylethyl](4-toluenesulfonyl)amido}-(mesitylene)ruthenium(II) is added before a mixture of 7.03 g (153 mmol) formic acid (98%) and 3.00 mL toluene is added over a time period of 60 min. The funnel is rinsed with 7.00 ml toluene. Stirring is continued at 40° C. for approx. 90 min until full conversion (HPLC). 1.43 g (8.73 mmol) N-acetyl-L-cystein is added and stirring is continued for 30 min. A mixture of 15.8 g (160 mmol) conc. HCl in 24 ml water is added and the aqueous phase is separated. The organic phase is washed with 35.0 ml water and 140 ml solvent is distilled off. 90 ml IPA is added and 70 ml solvent is distilled off. To the residue 50 ml water is added and the mixture is cooled to 35° C. Then, seeds are added followed by 50 ml water. The suspension is cooled to 22° C. and stirred for 2 h. The product is filtered off, washed with water (2×30 ml) and dried. Yield: 18.6 g; LC (method 1): tR=0.91 min; Mass spectrum (ESI+): m/z=213 [M+H—H2O]+. The mixture is degassed is added over a time period of 60 min The funnel is rinsed with 7.00 ml toluene stirring is continued for 30 min is added the aqueous phase is separated The organic phase is washed with 35.0 ml water and 140 ml solvent is distilled off 90 ml IPA is added 70 ml solvent is distilled off To the residue 50 ml water is added the mixture is cooled to 35° C Then, seeds are added The suspension is cooled to 22° C. stirred for 2 h The product is filtered off washed with water (2×30 ml) dried

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

Procedure: Triethylamine (26.2 mL, 187 mmol) is dissolved in dichloromethane (100 mL) and cooled to 0° C. then formic acid (7.96 mL, 211 mmol) is added dropwise with cooling. 4-Bromo-7-fluoro-indan-1-one (European patent EP2042480, 13.8 g, 60 mmol) is added and the mixture degassed with a flow of argon. Chloro([1S,2S)-(+2-amino-1,2-diphenylethyl](4-toluenesulfonyl)amido)(mesitylene)ruthenium(II) complex (375 mg, 0.6 mmol) is added and the mixture is stirred overnight at room temperature. Water is added, the mixture shaken and the phases separated. The organic phase is dried and concentrated under vacuum. The residue is purified by flash chromatography (0-20% ethyl acetate in cyclohexane) to give the title compound (Yield 13.1 g). GC (METHOD 1): tR=9.35 min; Mass spectrum (EI+): m/z=229, 231 [M]+, e.e. 100% by chiral HPLC (Column: Daicel Chiralcel OJ-H, 4.6×250 mm, 5 μm Mobile phase: hexane:ethanol 95:5, 1 mL/min, 25° C.) tR=9.87 min. with cooling the mixture degassed with a flow of argon Chloro([1S,2S)-(+2-amino-1,2-diphenylethyl](4-toluenesulfonyl)amido)(mesitylene)ruthenium(II) complex (375 mg, 0.6 mmol) is added the mixture shaken the phases separated The organic phase is dried concentrated under vacuum The residue is purified by flash chromatography (0-20% ethyl acetate in cyclohexane)

Conditions: temp:65.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a room temperature solution of aluminum chloride (11.77 g, 88 mmol) in dichloroethane (100 mL) was added 7-fluoro-2,3-dihydro-1H-inden-1-one (5.3 g, 35.3 mmol) followed with bromine (1.91 mL, 37.1 mmol). The mixture was heated at 65° C. for 16 hours, then cooled to ambient temperature and poured into a mixture of ice and HCl (1N aqueous). The mixture was extracted twice with ether (200 mL). The combined organic extracts were dried (MgSO4), filtered, and concentrated under reduced pressure. The residue was purified by chromatography (silica gel column eluting with 0-10% EtOAc/hexanes) to provide the title compound (5.2 g, 64%). MS (DCI/NH3) m/z 246 (M+NH4)+. cooled to ambient temperature The mixture was extracted twice with ether (200 mL) The combined organic extracts were dried (MgSO4) filtered concentrated under reduced pressure The residue was purified by chromatography (silica gel column eluting with 0-10% EtOAc/hexanes)