Water → Ethyl 2-ethyl-4-[4-(methylsulfonyl)phenoxy]-1-benzofuran-6-carboxylate

HRID 1177263Notes

Reaction equation

[CH2:1]([C:3]1[O:4][C:5]2[CH:11]=[C:10]([C:12]([O:14][CH2:15][CH3:16])=[O:13])[CH:9]=[C:8]([OH:17])[C:6]=2[CH:7]=1)[CH3:2].[CH3:18][S:19]([C:22]1[CH:27]=[CH:26][C:25](F)=[CH:24][CH:23]=1)(=[O:21])=[O:20].C([O-])([O-])=O.[Cs+].[Cs+].O>CN(C=O)C>[CH2:1]([C:3]1[O:4][C:5]2[CH:11]=[C:10]([C:12]([O:14][CH2:15][CH3:16])=[O:13])[CH:9]=[C:8]([O:17][C:25]3[CH:26]=[CH:27][C:22]([S:19]([CH3:18])(=[O:21])=[O:20])=[CH:23][CH:24]=3)[C:6]=2[CH:7]=1)[CH3:2]

Participants

Conditions

Temperature: 100 °C

Procedure

A mixture of ethyl 2-ethyl-4-hydroxy-1-benzofuran-6-carboxylate (0.80 g, 3.4 mmol), 4-fluorophenyl methyl sulfone (0.60 g, 3.4 mmol) and Cs2CO3 (1.12 g, 3.4 mmol) in DMF (40 mL) was heated to 100° C. overnight. The reaction was monitored by TLC (petroleum ether/EtOAc 4:1). The mixture was poured into water (50 mL) and extracted with EtOAc (90 mL×3). The organic layer was washed with brine (50 mL×2), dried over Na2SO4 and concentrated. The product was purified via column chromatography on silica gel eluted with petroleum ether/EtOAc (20:1) to afford the desired compound (0.80 g, 60%) as a colorless oil.

Workup

extractionextracted with EtOAc (90 mL×3)
washThe organic layer was washed with brine (50 mL×2)
dry with materialdried over Na2SO4
concentrationconcentrated
customThe product was purified via column chromatography on silica gel
washeluted with petroleum ether/EtOAc (20:1)

Sources & evidence

ORD record: ord-04983dd0f8534b99a18a1d2cbba7971c
Source dataset: uspto-grants-2010_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07842713B2

Reaction notes

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