Pyridine → (2S)-2-(4-chloro-benzenesulfonylamino)-5,5,5-trifluoro-3-(2,2,2-trifluoroethyl)pentanoic acid methyl ester
Reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([S:8](Cl)(=[O:10])=[O:9])=[CH:4][CH:3]=1.[CH3:12][O:13][C:14](=[O:28])[C@@H:15]([NH2:27])[CH:16]([CH2:22][C:23]([F:26])([F:25])[F:24])[CH2:17][C:18]([F:21])([F:20])[F:19].N1C=CC=CC=1>C(Cl)Cl.Cl>[CH3:12][O:13][C:14](=[O:28])[C@@H:15]([NH:27][S:8]([C:5]1[CH:6]=[CH:7][C:2]([Cl:1])=[CH:3][CH:4]=1)(=[O:10])=[O:9])[CH:16]([CH2:17][C:18]([F:21])([F:20])[F:19])[CH2:22][C:23]([F:25])([F:26])[F:24]Participants
6
Reactant 3
Product 1
Reagents, catalysts & solvents 2
Conditions
- Temperature
- 25 °C
Procedure
A solution of 4-chlorobenzenesulfonyl chloride (2.66 g, 12.2 mmol, 97% pure) in CH2Cl2 (7 mL) was added to a solution of (2S)-2-amino-5,5,5-trifluoro-3-(2,2,2-trifluoroethyl)pentanoic acid methyl ester (2.173 g, 8.14 mmol) and pyridine (1.97 mL, 24.4 mmol) in CH2Cl2 (15 mL). The reaction mixture was stirred at 25° C. for 4 hours, then cooled to 0° C. IN HCl (15 mL) was added followed by dichloromethane (10 mL) and the phases were separated. The organic phase was washed with 1N HCl (15 mL) and brine, dried over Na2SO4, and concentrated to afford 4.1 g of crude mixture as a yellow solid. The solids were recrystallized from heptane (14 mL) to afford 3.035 g of the title product (84% yield). Mass Spectrum (+ESI): 442 [M+H]+
Workup
- temperaturecooled to 0° C
- customthe phases were separated
- washThe organic phase was washed with 1N HCl (15 mL) and brine
- dry with materialdried over Na2SO4
- concentrationconcentrated
- customto afford 4.1 g of crude mixture as a yellow solid
- customThe solids were recrystallized from heptane (14 mL)
Sources & evidence
- ORD record
- ord-694504c6baaf4c2a9352d45517abc789
- Source dataset
- uspto-grants-2009_01
- Patent number
- US07476762B2
Reaction notes
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