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Dimethylformamide → 1-[7-(2-Methoxyethoxy)-2,2,4,6-tetramethyl-2,3-dihydro-1-benzofuran-5-yl]-4-(4-methylphenyl)piperazine

HRID 1850500
Notes
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Reaction equation

HRID 1850500 reaction equation
CN(C=O)C.[CH3:6][C:7]1([CH3:32])[CH2:11][C:10]2[C:12]([CH3:31])=[C:13]([N:18]3[CH2:23][CH2:22][N:21]([C:24]4[CH:29]=[CH:28][C:27]([CH3:30])=[CH:26][CH:25]=4)[CH2:20][CH2:19]3)[C:14]([CH3:17])=[C:15]([OH:16])[C:9]=2[O:8]1.Br[CH2:34][CH2:35][O:36][CH3:37].C(=O)([O-])[O-].[K+].[K+]>C(OCC)(=O)C.O>[CH3:37][O:36][CH2:35][CH2:34][O:16][C:15]1[C:9]2[O:8][C:7]([CH3:32])([CH3:6])[CH2:11][C:10]=2[C:12]([CH3:31])=[C:13]([N:18]2[CH2:19][CH2:20][N:21]([C:24]3[CH:25]=[CH:26][C:27]([CH3:30])=[CH:28][CH:29]=3)[CH2:22][CH2:23]2)[C:14]=1[CH3:17]
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 4

HCID 6228DimethylformamideHCID 11430Potassium CarbonateHCID 809722-Bromoethyl methyl etherHCID 594849982,2,4,6-Tetramethyl-5-[4-(4-methylphenyl)piperazin-1-yl]-2,3-dihydro-1-benzofuran-7-ol

Product 1

HCID 594851191-[7-(2-Methoxyethoxy)-2,2,4,6-tetramethyl-2,3-dihydro-1-benzofuran-5-yl]-4-(4-methylphenyl)piperazineYield 14.5%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
100 °C

Procedure

To a solution of DMF (5 mL) containing 2,2,4,6-tetramethyl-5-[4-(4-methylphenyl)piperazin-1-yl]-2,3-dihydro-1-benzofuran-7-ol (200 mg, 0.546 mmol) synthesized in Example 72, 1-bromo-2-methoxyethane (382 mg, 2.75 mmol) and potassium carbonate (380 mg, 2.75 mmol) were added, and the mixture was stirred at 100° C. for 24 hours. After cooled to room temperature, water was added to the mixture, and extraction was performed using ethyl acetate. The extract was dried using anhydrous magnesium sulfate, and the solvent was removed under reduced pressure. The obtained residue was purified by silica gel column chromatography (hexane-ethyl acetate 100:0-90:10) to obtain 33.5 mg of the title compound (yield 14%). Melting point was 118 to 120° C. (hexane).

Workup

  1. additionwere added
  2. temperatureAfter cooled to room temperature
  3. customThe extract was dried
  4. customthe solvent was removed under reduced pressure
  5. customThe obtained residue was purified by silica gel column chromatography (hexane-ethyl acetate 100:0-90:10)

Sources & evidence

ORD record
ord-2263fa93ab3047f9860824474911f887
Source dataset
uspto-grants-2015_02
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08957069B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes