Sodium Carbonate → 4-[(5E)-5-(5,6-difluoro-2-oxo-1,2-dihydro-3H-indol-3-ylidene)-2,2-dimethyl-2,5-dihydrofuran-3-yl]benzaldehyde

HRID 2196150Notes

Reaction equation

O1CCOCC1.Br[C:8]1[C:12]([CH3:14])([CH3:13])[O:11]/[C:10](=[C:15]2/[C:16](=[O:26])[NH:17][C:18]3[C:23]/2=[CH:22][C:21]([F:24])=[C:20]([F:25])[CH:19]=3)/[CH:9]=1.[CH:27]([C:29]1[CH:34]=[CH:33][C:32](B(O)O)=[CH:31][CH:30]=1)=[O:28].C([O-])([O-])=O.[Na+].[Na+]>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>[F:24][C:21]1[CH:22]=[C:23]2[C:18](=[CH:19][C:20]=1[F:25])[NH:17][C:16](=[O:26])/[C:15]/2=[C:10]1\[CH:9]=[C:8]([C:32]2[CH:33]=[CH:34][C:29]([CH:27]=[O:28])=[CH:30][CH:31]=2)[C:12]([CH3:14])([CH3:13])[O:11]\1

Participants

Conditions

Temperature: 80 °C

Procedure

To 10 mL of 1,4-dioxane was added (3E)-3-(4-bromo-5,5-dimethylfuran-2(5H)-ylidene)-5,6-difluoro-1,3-dihydro-2H-indol-2-one (85 mg, 0.25 mmol), 4-formylphenylboronic acid (45 mg, 0.30 mmol), PdCl2(PPh3)2 (10 mg, 0.014 mmol), 2M Na2CO3 aqueous solution (0.5 mL, 1.0 mmol). The mixture was heated at 80° C. under N2 for 30 minutes. After cooling to room temperature, the mixture was diluted with EtOAc (80 mL). The EtOAc solution was washed with brine (2×50 mL), dried over Na2SO4, and concentrated to give 4-[(5E)-5-(5,6-difluoro-2-oxo-1,2-dihydro-3H-indol-3-ylidene)-2,2-dimethyl-2,5-dihydrofuran-3-yl]benzaldehyde as the crude product, which was used in the next step without further purification.

Workup

temperatureAfter cooling to room temperature
washThe EtOAc solution was washed with brine (2×50 mL)
dry with materialdried over Na2SO4
concentrationconcentrated

Sources & evidence

ORD record: ord-c6718c2893dc4a369d726d7773d53c24
Source dataset: uspto-grants-2012_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08338415B2

Reaction notes

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