Citric Acid → 4-Amino-5-Cyano-2-fluoro-6-methylbiphenyl-3-yl cyclobutanecarboxylate

HRID 17498

Reaktionsgleichung

[NH2:1][C:2]1[C:9]([OH:10])=[C:8]([F:11])[C:7]([C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)=[C:6]([CH3:18])[C:3]=1[C:4]#[N:5].C(N(CC)CC)C.[CH:26]1([C:30](Cl)=[O:31])[CH2:29][CH2:28][CH2:27]1.C(O)(=O)CC(CC(O)=O)(C(O)=O)O>C(#N)C>[CH:26]1([C:30]([O:10][C:9]2[C:8]([F:11])=[C:7]([C:12]3[CH:13]=[CH:14][CH:15]=[CH:16][CH:17]=3)[C:6]([CH3:18])=[C:3]([C:4]#[N:5])[C:2]=2[NH2:1])=[O:31])[CH2:29][CH2:28][CH2:27]1

Komponenten

Reaktionsbedingungen

Temperatur: 0 °C

Versuchsvorschrift

Under nitrogen atmosphere, 2-amino-5-phenyl-4-fluoro-3-hydroxy-6-methylbenzonitrile (I-41) (250 mg, 1.03 mmol) was dissolved in acetonitrile (0.10 ml), and cooled to 0° C. Triethylamine (244 μl, 1.75 mmol) and cyclobutanecarbonyl chloride (177 μl, 1.55 mmol) were dropwise added to the solution, followed by stirring at room temperature for 1 hour. 10% citric acid was added to the reaction liquid, and the solvent was evaporated away under, reduced pressure. Ethyl acetate was added to the resulting residue, followed by washing with saturated brine. The organic layer was dried over anhydrous magnesium sulfate, and the solvent was evaporated away under reduced pressure. The resulting residue was subjected to silica gel column chromatography, and the eluate with ethyl acetate/hexane (1:4, v/v) gave the entitled compound (283 mg, 85%) as a white solid.

Aufarbeitung

customthe solvent was evaporated away under, reduced pressure
additionEthyl acetate was added to the resulting residue
washby washing with saturated brine
dry with materialThe organic layer was dried over anhydrous magnesium sulfate
customthe solvent was evaporated away under reduced pressure

Quellen und Nachweise

ORD-Eintrag: ord-6306fbf97e3d4cb984eb4bec6402c498
Quelldatensatz: uspto-grants-2010_06
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US07737166B2

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