Hydrochloric Acid → (R)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-1-(4-fluorophenyl)-2-(2-methyl-2H-tetrazol-5-yl)ethanamine

HRID 1874229Notes

Reaction equation

HRID 1874229 reaction equation
[F:1][C:2]1[CH:3]=[C:4]([C@:15]([NH:48][S@@](C(C)(C)C)=O)([C:41]2[CH:46]=[CH:45][C:44]([F:47])=[CH:43][CH:42]=2)[CH2:16][C:17]2[N:18]=[N:19][N:20]([C:22](C3C=CC=CC=3)(C3C=CC=CC=3)C3C=CC=CC=3)[N:21]=2)[CH:5]=[C:6]([O:8][C:9]([F:14])([F:13])[CH:10]([F:12])[F:11])[CH:7]=1.Cl>CO.O1CCOCC1>[F:1][C:2]1[CH:3]=[C:4]([C@@:15]([C:41]2[CH:42]=[CH:43][C:44]([F:47])=[CH:45][CH:46]=2)([NH2:48])[CH2:16][C:17]2[N:18]=[N:19][N:20]([CH3:22])[N:21]=2)[CH:5]=[C:6]([O:8][C:9]([F:14])([F:13])[CH:10]([F:11])[F:12])[CH:7]=1

Participants

5

Reactant 2

HCID 313Hydrochloric AcidHCID 86613057(R)-N-((R)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-1-(4-fluorophenyl)-2-(2-trityl-2H-tetrazol-5-yl)ethyl)-2-methylpropane-2-sulfinamide

Product 1

HCID 59458682(R)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-1-(4-fluorophenyl)-2-(2-methyl-2H-tetrazol-5-yl)ethanamineYield 30%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 312751,4-DioxaneSolvent

Procedure

To a solution of (R)—N—((R)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-1-(4-fluorophenyl)-2-(2-trityl-2H-tetrazol-5-yl)ethyl)-2-methylpropane-2-sulfinamide (60 mg, 0.079 mmol) in MeOH (3 mL) was added 4 N HCl in dioxane (1 mL). The reaction mixture was stirred at room temperature for 20 min, then concentrated to yield (R)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-1-(4-fluorophenyl)-2-(2H-tetrazol-5-yl)ethanamine LCMS: RT=2.66 min [M+H] 418.55 (Phenomenex Luna C18 4.6×50 mm column, eluting with 10-90% MeOH/H2O containing 0.1% TFA, 4 min gradient, flow rate 4 mL/min, wavelength 220 nm). To a solution of ((R)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-1-(4-fluorophenyl)-2-(2H-tetrazol-5-yl)ethanamine in THF (3 mL) and MeOH (0.5 mL) was added (diazomethyl)trimethylsilane (2.0 M in hexanes, 0.05 mL). After stirring at room temperate for 20 min, the reaction mixture was concentrated and purified by ISCO flash column chromatography (silica gel, EtOAc) to give ((R)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-1-(4-fluorophenyl)-2-(2-methyl-2H-tetrazol-5-yl)ethanamine (10 mg, yield: 30%). LCMS: RT=2.83 min [M+H] 432.57 (Phenomenex Luna C18 column, 4.6×50 mm eluting with 10-90% MeOH/H2O over 4 minutes containing 0.1% TFA; 4 mL/min, monitoring at 220 nm).

Workup

  1. concentrationconcentrated
  2. customto yield
  3. wash(R)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-1-(4-fluorophenyl)-2-(2H-tetrazol-5-yl)ethanamine LCMS: RT=2.66 min [M+H] 418.55 (Phenomenex Luna C18 4.6×50 mm column, eluting with 10-90% MeOH/H2O containing 0.1% TFA, 4 min gradient, flow rate 4 mL/min, wavelength 220 nm)
  4. additionTo a solution of ((R)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-1-(4-fluorophenyl)-2-(2H-tetrazol-5-yl)ethanamine in THF (3 mL) and MeOH (0.5 mL) was added (diazomethyl)trimethylsilane (2.0 M in hexanes, 0.05 mL)
  5. stirringAfter stirring at room temperate for 20 min
  6. concentrationthe reaction mixture was concentrated
  7. custompurified by ISCO flash column chromatography (silica gel, EtOAc)

Sources & evidence

ORD record
ord-94d76c89db384f86b962df1657b36947
Source dataset
uspto-grants-2012_11
Patent number
US08304403B2

Reaction notes

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