Cesium carbonate → 4-Chloro-2-(difluoromethyl)-1-(2-{[4-(methylsulfonyl)phenyl]oxy}ethyl)-1H-indole-5-carbonitrile

HRID 1188352Notes

Reaction equation

[Cl:1][C:2]1[C:10]([C:11]#[N:12])=[CH:9][CH:8]=[C:7]2[C:3]=1[CH:4]=[C:5]([CH:13]([F:15])[F:14])[NH:6]2.C([O-])([O-])=O.[Cs+].[Cs+].[CH3:22][S:23]([C:26]1[CH:31]=[CH:30][C:29]([O:32][CH2:33][CH2:34]Br)=[CH:28][CH:27]=1)(=[O:25])=[O:24]>CC#N>[Cl:1][C:2]1[C:10]([C:11]#[N:12])=[CH:9][CH:8]=[C:7]2[C:3]=1[CH:4]=[C:5]([CH:13]([F:14])[F:15])[N:6]2[CH2:34][CH2:33][O:32][C:29]1[CH:28]=[CH:27][C:26]([S:23]([CH3:22])(=[O:25])=[O:24])=[CH:31][CH:30]=1

Participants

Conditions

Temperature: 100 °C

Procedure

To a solution of 4-chloro-2-(difluoromethyl)-1H-indole-5-carbonitrile (0.019 g, 0.084 mmol) in MeCN (2 mL), under N2, was added Cs2CO3 (0.055 g, 0.17 mmol) and 4-[(2-bromoethyl)oxy]phenyl methyl sulfone (0.047 g, 0.17 mmol). The mixture was heated in a sealed tube at 100° C. for 1 h. Upon cooling, the mixture was partitioned between EtOAc and water. The organic phase was washed with sat'd brine, dried (Na2SO4) and concentrated in vacuo. The residue was purified by flash chromatography (0-70% EtOAc-hexanes gradient) and the product was crystallized from CH2Cl2-hexanes to give the title compound as a white solid (0.022 g, 61% yield): MS (ES) m/z 425 (M+1).

Workup

temperatureUpon cooling
customthe mixture was partitioned between EtOAc and water
washThe organic phase was washed with sat'd brine
dry with materialdried (Na2SO4)
concentrationconcentrated in vacuo
customThe residue was purified by flash chromatography (0-70% EtOAc-hexanes gradient)
customthe product was crystallized from CH2Cl2-hexanes

Sources & evidence

ORD record: ord-6fc237df39514f6d8623a3d7d00c1f57
Source dataset: uspto-grants-2014_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08673948B2

Reaction notes

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