Dimethylformamide → 4-ethenyl-5-[4-(4-methoxyphenyl)piperazin-1-yl]-2,2,6,7-tetramethyl-1-benzofuran-3(2H)-one

HRID 2063789Notes

Reaction equation

Br[CH2:2][CH2:3][N:4]([CH2:13][CH2:14]Br)[C:5]1[CH:10]=[CH:9][C:8]([O:11][CH3:12])=[CH:7][CH:6]=1.C(=O)([O-])O.[Na+].CN(C=O)C.[NH2:26][C:27]1[C:28]([CH3:42])=[C:29]([CH3:41])[C:30]2[O:34][C:33]([CH3:36])([CH3:35])[C:32](=[O:37])[C:31]=2[C:38]=1[CH:39]=[CH2:40]>C(OCC)(=O)C.O>[CH:39]([C:38]1[C:31]2[C:32](=[O:37])[C:33]([CH3:35])([CH3:36])[O:34][C:30]=2[C:29]([CH3:41])=[C:28]([CH3:42])[C:27]=1[N:26]1[CH2:14][CH2:13][N:4]([C:5]2[CH:6]=[CH:7][C:8]([O:11][CH3:12])=[CH:9][CH:10]=2)[CH2:3][CH2:2]1)=[CH2:40]

Participants

Conditions

Temperature: 120 °C

Procedure

N,N-bis(2-bromoethyl)-4-methoxyaniline (2.45 g, 7.63 mmol) and sodium hydrogencarbonate (1.25 g, 1.40 mmol) were added to a solution of DMF (36 mL) containing 5-amino-4-ethenyl-2,2,6,7-tetramethyl-1-benzofuran-3(2H)-one (1.47 g, 6.36 mmol) synthesized in Reference Example 22, and the mixture was stirred at 120° C. for 16 hours. After cooled to room temperature, water was added to the mixture, and extraction was performed using ethyl acetate. It was dried using anhydrous magnesium sulfate. After that, the solvent was removed under reduced pressure, and the obtained residue was purified by silica gel column chromatography (hexane-ethyl acetate: 100:0 to 90:10) to give 217 mg of the title compound (yield: 8%).

Workup

customsynthesized in Reference Example 22
temperatureAfter cooled to room temperature
customIt was dried
customAfter that, the solvent was removed under reduced pressure
customthe obtained residue was purified by silica gel column chromatography (hexane-ethyl acetate: 100:0 to 90:10)

Sources & evidence

ORD record: ord-0fb8c894e81d4c269bda570e6e8ec3ea
Source dataset: uspto-grants-2012_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08288390B2

Reaction notes

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