Tert-butyl(4-chloro-2-ethynylphenoxy)acetate → Tert-butyl(4-chloro-2-{[2-fluoro-5-(propylsulfonyl)phenyl]ethynyl}phenoxy)acetate

HRID 2390191Notes

Reaction equation

Br[C:2]1[CH:7]=[C:6]([S:8]([CH2:11][CH2:12][CH3:13])(=[O:10])=[O:9])[CH:5]=[CH:4][C:3]=1[F:14].[C:15]([O:19][C:20](=[O:32])[CH2:21][O:22][C:23]1[CH:28]=[CH:27][C:26]([Cl:29])=[CH:25][C:24]=1[C:30]#[CH:31])([CH3:18])([CH3:17])[CH3:16]>CCOC(C)=O.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>[C:15]([O:19][C:20](=[O:32])[CH2:21][O:22][C:23]1[CH:28]=[CH:27][C:26]([Cl:29])=[CH:25][C:24]=1[C:30]#[C:31][C:2]1[CH:7]=[C:6]([S:8]([CH2:11][CH2:12][CH3:13])(=[O:10])=[O:9])[CH:5]=[CH:4][C:3]=1[F:14])([CH3:18])([CH3:17])[CH3:16]

Participants

Conditions

Temperature: 60 °C

Procedure

A mixture of 2-bromo-1-fluoro-4-(propylsulfonyl)benzene (Intermediate 106; 541 mg; 1.93 mmol), tert-butyl(4-chloro-2-ethynylphenoxy)acetate (Intermediate 467 mg; 1.75 mmol), dichlorobis(triphenylphosphine)palladium(II) (49 mg; 0.07 mmol) and TEA (728 μL; 5.2 mmol) was heated at 60° C. for 18 hours. The reaction mixture was taken up in EtOAc, washed twice with a sat. NH4Cl aqueous solution and once with brine. The organic phase was dried over MgSO4, filtered and concentrated to dryness affording a crude, which was purified by flash column chromatography (silica), eluting with cyclohexane containing increasing amounts of EtOAc. The title compound was obtained as a brown solid.

Workup

washwashed twice with a sat. NH4Cl aqueous solution and once with brine
dry with materialThe organic phase was dried over MgSO4
filtrationfiltered
concentrationconcentrated to dryness
customaffording a crude, which
customwas purified by flash column chromatography (silica)
washeluting with cyclohexane containing
temperatureincreasing amounts of EtOAc

Sources & evidence

ORD record: ord-4387823edfb9457b87022d1344fb6092
Source dataset: uspto-grants-2012_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08273769B2

Reaction notes

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