Sodium Carbonate → 4-Chloro-5,7-difluoro-3-methyl-2-(5-(methylthio)pyridin-3-yl)quinoline

HRID 1431596Notes

Reaction equation

Cl[C:2]1[C:11]([CH3:12])=[C:10]([Cl:13])[C:9]2[C:4](=[CH:5][C:6]([F:15])=[CH:7][C:8]=2[F:14])[N:3]=1.[CH3:16][S:17][C:18]1[CH:19]=[C:20](B(O)O)[CH:21]=[N:22][CH:23]=1.C(=O)([O-])[O-].[Na+].[Na+].O1CCOCC1>Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.O>[Cl:13][C:10]1[C:9]2[C:4](=[CH:5][C:6]([F:15])=[CH:7][C:8]=2[F:14])[N:3]=[C:2]([C:20]2[CH:21]=[N:22][CH:23]=[C:18]([S:17][CH3:16])[CH:19]=2)[C:11]=1[CH3:12]

Participants

Conditions

Temperature: 95 °C

Procedure

A screw-cap vial was charged with 2,4-dichloro-5,7-difluoro-3-methylquinoline (600 mg, 2.42 mmol), 5-(methylthio)pyridin-3-ylboronic acid (429 mg, 2.54 mmol), dichlorobis(triphenylphosphine)palladium (II) (170 mg, 0.24 mmol), sodium carbonate (769 mg, 7.26 mmol), 1,4-dioxane (6.5 mL), and water (1.6 mL). The mixture was stirred at 95° C. for 2 h, then cooled to rt and partitioned between EtOAc and water. The organic layer was washed with brine, dried over magnesium sulfate, and cond. The crude product was purified by flash chromatography (silica gel, 0-30% EtOAc in hexanes), affording 4-chloro-5,7-difluoro-3-methyl-2-(5-(methylthio)pyridin-3-yl)quinoline. Mass Spectrum (ESI) m/e=337.0 (M+1).

Workup

temperaturecooled to rt
custompartitioned between EtOAc and water
washThe organic layer was washed with brine
dry with materialdried over magnesium sulfate, and cond
customThe crude product was purified by flash chromatography (silica gel, 0-30% EtOAc in hexanes)

Sources & evidence

ORD record: ord-3eeefaf8bfc64ba8b705f6198d1a885e
Source dataset: uspto-grants-2015_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08940724B2

Reaction notes

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