Thiophenol → 4-Bromo-N-methyl-2-nitro-3-(phenylthio)aniline

HRID 1057010Notes

Reaction equation

[Br:1][C:2]1[CH:9]=[CH:8][C:5]([NH:6][CH3:7])=[C:4]([N+:10]([O-:12])=[O:11])[C:3]=1F.C(=O)([O-])[O-].[Cs+].[Cs+].[C:20]1([SH:26])[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1>CN(C)C=O.C(OCC)(=O)C.O>[Br:1][C:2]1[CH:9]=[CH:8][C:5]([NH:6][CH3:7])=[C:4]([N+:10]([O-:12])=[O:11])[C:3]=1[S:26][C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1

Participants

Conditions

Temperature: 80 °C

Procedure

A solution of 4-bromo-3-fluoro-N-methyl-2-nitroaniline (0.30 g, 1.20 mmol) in N,N-dimethylformamide (2.45 mL) was treated with cesium carbonate (0.472 g, 1.45 mmol) and benzenethiol (0.149 mL, 1.45 mmol). The resultant reaction mixture was warmed to 80° C. and stirred at 80° C. for 30 min, after which time the reaction mixture was diluted with ethyl acetate and water. Layers were separated and the organic layer was washed with 10% solution of K2CO3 and brine, dried with sodium sulfate, filtered, and concentrated in vacuo to give the crude product. Purification by flash column chromatography (100% hexanes to 40% EtOAc/hexanes) gave the desired product (396 mg, 97%) as an orange solid. LCMS calculated for C13H12BrN2O2S (M+H)+: m/z=339.0, 341.0. found: 338.9, 340.9.

Workup

customThe resultant reaction mixture
customLayers were separated
washthe organic layer was washed with 10% solution of K2CO3 and brine
dry with materialdried with sodium sulfate
filtrationfiltered
concentrationconcentrated in vacuo
customto give the crude product
customPurification by flash column chromatography (100% hexanes to 40% EtOAc/hexanes)

Sources & evidence

ORD record: ord-d8231d3e86734e1ba0f561fc87a9402c
Source dataset: uspto-grants-2016_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09399640B2

Reaction notes

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