Water → 1,3-Diallyl-5-[2-(2-chloro-4-methoxy-phenyl)-propionyl]-1,3-dihydro-benzoimidazol-2-one

HRID 2386804Notes

Reaction equation

[Mg].[Cl:2][C:3]1[CH:8]=[C:7]([O:9][CH3:10])[CH:6]=[CH:5][C:4]=1[CH:11](Cl)[CH3:12].CON(C)[C:17]([C:19]1[CH:34]=[CH:33][C:22]2[N:23]([CH2:30][CH:31]=[CH2:32])[C:24](=[O:29])[N:25]([CH2:26][CH:27]=[CH2:28])[C:21]=2[CH:20]=1)=[O:18].O>C1COCC1>[CH2:30]([N:23]1[C:22]2[CH:33]=[CH:34][C:19]([C:17](=[O:18])[CH:11]([C:4]3[CH:5]=[CH:6][C:7]([O:9][CH3:10])=[CH:8][C:3]=3[Cl:2])[CH3:12])=[CH:20][C:21]=2[N:25]([CH2:26][CH:27]=[CH2:28])[C:24]1=[O:29])[CH:31]=[CH2:32]

Participants

Conditions

Temperature: -10 °C

Procedure

A 1M suspension of Rieke magnesium in THF (1.3 ml) was added to THF (2 ml). The mixture was cooled to −10° C., and a solution of 2-chloro-1-(1-chloro-ethyl)-4-methoxy-benzene (136 mg) in THF (2 ml) was added. The mixture was stirred for 15 min. A solution of 1,3-diallyl-2-oxo-2,3-dihydro-1H-benzoimidazole-5-carboxylic acid methoxy-methyl-amide (100 mg) in THF (2 ml) was added at −10° C. The mixture was stirred overnight at room temperature. Water was added and extracted with EtOAc. The combined organic layers were dried over Na2SO4 and then concentrated to an oil. The residue was purified by flash chromatography (SiO2, 0 to 100% EtOAc/heptane) to give the title compound (72 mg) as a light yellow foam. MS (m/e)=411.2 [M+H+].

Workup

stirringThe mixture was stirred overnight at room temperature
extractionextracted with EtOAc
dry with materialThe combined organic layers were dried over Na2SO4
concentrationconcentrated to an oil
customThe residue was purified by flash chromatography (SiO2, 0 to 100% EtOAc/heptane)

Sources & evidence

ORD record: ord-9feceda733b8490ba6511fca1c77d752
Source dataset: uspto-grants-2012_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08268820B2

Reaction notes

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