Water → Rac-4-[(4r,5r)-4-hydroxy-3,3,5-trimethyl-2-oxopyrrolidin-1-yl]-2-(trifluoromethyl)benzonitrile

HRID 1967334Notes

Reaction equation

[F:1][C:2]([F:22])([F:21])[C:3]1[CH:10]=[C:9]([N:11]2[CH:15]([CH3:16])[C:14](=[O:17])[C:13]([CH3:19])([CH3:18])[C:12]2=[O:20])[CH:8]=[CH:7][C:4]=1[C:5]#[N:6].C([BH-](C(CC)C)C(CC)C)(CC)C.[Li+].C1COCC1.O>C1COCC1>[OH:17][C@H:14]1[C@@H:15]([CH3:16])[N:11]([C:9]2[CH:8]=[CH:7][C:4]([C:5]#[N:6])=[C:3]([C:2]([F:1])([F:21])[F:22])[CH:10]=2)[C:12](=[O:20])[C:13]1([CH3:18])[CH3:19]

Participants

Conditions

Temperature: -78 °C

Procedure

A solution of 2-(trifluoromethyl)-4-(3,3,5-trimethyl-2,4-dioxopyrrolidin-1-yl)benzonitrile (50 mg) in THF (5 mL) was cooled to −78° C., lithium tri(sec-butyl)borohydride-THF solution (0.242 mL, 1 mol/L) was added, and the mixture was stirred at −78° C. for 30 min. Water was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The extract was washed with saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography, and the obtained solid was recrystallized from hexane-ethyl acetate to give the title compound as a colorless solid (yield: 32.2 mg, 64%).

Workup

extractionthe mixture was extracted with ethyl acetate
washThe extract was washed with saturated brine
dry with materialdried over anhydrous magnesium sulfate
concentrationconcentrated under reduced pressure
customThe residue was purified by silica gel column chromatography
customthe obtained solid was recrystallized from hexane-ethyl acetate

Sources & evidence

ORD record: ord-2b2dec5baeef4333aa913a862db3bcac
Source dataset: uspto-grants-2013_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08420694B2

Reaction notes

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