1,1-difluoro-2-iodoethane

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: To a suspension of NaH (60% dispersion in mineral oil, 59 mg, 1.48 mmol) in DMF (2 mL) was slowly added a solution of 1H-indole-5-carboxylic acid methyl ester 19a (200 mg, 1.14 mmol) in DMF (1 mL) at 0° C. The resulting solution was stirred at 0° C. for 20 min and 1,1-difluoro-2-iodoethane 23a (263 mg, 1.37 mmol) was added. The reaction was warmed to room temperature and stirred for 2 h. The reaction was quenched with water and extracted with EtOAc. The organic layer was concentrated and purified by flash column chromatography (silica gel, 20% EtOAc/hexanes) to afford compound 23b. The reaction was warmed to room temperature stirred for 2 h The reaction was quenched with water extracted with EtOAc The organic layer was concentrated purified by flash column chromatography (silica gel, 20% EtOAc/hexanes)

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: To a solution of (3S,5R,6S)-3-allyl-5-(3-chlorophenyl)-6-(4-chlorophenyl)-3-methyl-1-(pyridin-2-ylmethyl)piperidin-2-one (705 mg, 1.515 mmol; Example 71, Step D) in inhibitor free THF (7 mL) under N2 at −78° C. was added lithium diisopropylamide (1.515 mL, 3.03 mmol) and the mixture was stirred for 30 min. 1,1-Difluoro-2-iodoethane (727 mg, 3.79 mmol; Oakwood) was added and the orange reaction mixture was stirred at −78° C. for 1 h. The reaction was warmed to rt overnight and quenched with 0.2 mL of MeOH, filtered and concentrated. The residue was purified by HPLC (C18 column, eluted with 10-95% CH3CN in water, with 0.1% TFA) to give (3S,5R,6S)-3-allyl-5-(3-chlorophenyl)-6-(4-chlorophenyl)-1-((R)-3,3-difluoro-1-(pyridin-2-yl)propyl)-3-methylpiperidin-2-one (HPLC retention time 7.38 min, Agilent Eclipse Plus C18 column, 0.1% TFA in CH3CN/H2O, gradient 70%-90% over 25 minutes) and (3S,5R,6S)-3-allyl-5-(3-chlorophenyl)-6-(4-chlorophenyl)-1-((S)-3,3-difluoro-1-(pyridin-2-yl)propyl)-3-methylpiperidin-2-one (HPLC retention time 7.94 min, Agilent Eclipse Plus C18 column (Agilent Technologies, Santa Clara, Calif.), 0.1% TFA in CH3CN/H2O, gradient 70%-90% over 25 minutes). Mass Spectrum (ESI) m/z=529 (M+1). the orange reaction mixture was stirred at −78° C. for 1 h quenched with 0.2 mL of MeOH filtered concentrated The residue was purified by HPLC (C18 column, eluted with 10-95% CH3CN in water, with 0.1% TFA)

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

Procedure: To a solution of (3S,5R,6S)-3-allyl-5-(3-chlorophenyl)-6-(4-chlorophenyl)-3-methyl-1-(pyridin-2-ylmethyl)piperidin-2-one (705 mg, 1.515 mmol; Example 71, Step D) in inhibitor free THF (7 mL) under N2 at −78° C. was added lithium diisopropylamide (1.515 mL, 3.03 mmol) and the mixture was stirred for 30 min. 1,1-Difluoro-2-iodoethane (727 mg, 3.79 mmol; Oakwood) was added and the orange reaction mixture was stirred at −78° C. for 1 h. The reaction was warmed to rt overnight and quenched with 0.2 mL of MeOH, filtered and concentrated. The residue was purified by HPLC (C18 column, eluted with 10-95% CH3CN in water, with 0.1% TFA) to give (3S,5R,6S)-3-allyl-5-(3-chlorophenyl)-6-(4-chlorophenyl)-1-((R)-3,3-difluoro-1-(pyridin-2-yl)propyl)-3-methylpiperidin-2-one (HPLC retention time 7.38 min, Agilent Eclipse Plus C18 column, 0.1% TFA in CH3CN/H2O, gradient 70%-90% over 25 minutes) and (3S,5R,6S)-3-allyl-5-(3-chlorophenyl)-6-(4-chlorophenyl)-1-((S)-3,3-difluoro-1-(pyridin-2-yl)propyl)-3-methylpiperidin-2-one (HPLC retention time 7.94 min, Agilent Eclipse Plus C18 column (Agilent Technologies, Santa Clara, Calif.), 0.1% TFA in CH3CN/H2O, gradient 70%-90% over 25 minutes). Mass Spectrum (ESI) m/z=529 (M+1). the orange reaction mixture was stirred at −78° C. for 1 h quenched with 0.2 mL of MeOH filtered concentrated The residue was purified by HPLC (C18 column, eluted with 10-95% CH3CN in water, with 0.1% TFA)

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

Procedure: A reaction mixture of EXAMPLE 422B (353 mg), 1,1-difluoro-2-iodoethane (268 mg) and Na2CO3 (283 mg) in N,N-dimethylformamide (10 mL) was heated at 80° C. overnight. The reaction mixture was cooled to room temperature and diluted with ethyl acetate. The organic phase was washed with water and brine, dried over anhydrous sodium sulfate, and concentrated. The crude material was purified with 2.5-3% methanol/dichloromethane to afford the title compound. The organic phase was washed with water and brine dried over anhydrous sodium sulfate concentrated The crude material was purified with 2.5-3% methanol/dichloromethane

Conditions: temp:110.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of EXAMPLE 415B (633 mg) in anhydrous N,N-dimethylformamide (10 mL) was added sodium carbonate (254 mg) and 2,2-difluoroethyl iodide (422 mg). After stirring at 110° C. for 48 hours, the mixture was concentrated. The residue was mixed with water (20 mL) and extracted with ethyl acetate. The crude product was purified on a silica gel column eluting with 10% methanol in methylene chloride to give the title compound. the mixture was concentrated The residue was mixed with water (20 mL) extracted with ethyl acetate The crude product was purified on a silica gel column eluting with 10% methanol in methylene chloride

Conditions: temp:110.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of EXAMPLE 415B (633 mg) in anhydrous N,N-dimethylformamide (10 mL) was added sodium carbonate (254 mg) and 2,2-difluoroethyl iodide (422 mg). After stirring at 110° C. for 48 hours, the mixture was concentrated. The residue was mixed with water (20 mL) and extracted with ethyl acetate. The crude product was purified on a silica gel column eluting with 10% methanol in methylene chloride to give the title compound. the mixture was concentrated The residue was mixed with water (20 mL) extracted with ethyl acetate The crude product was purified on a silica gel column eluting with 10% methanol in methylene chloride