Potassium Carbonate → E-4-[5-[2-(4-tert-Butylbenzyloxy)phenyl]-3-(3,5-difluoro-4-triisopropylsilanyloxybenzyl)pent-4-enyl]benzonitrile

HRID 1921896Notes

Reaction equation

HRID 1921896 reaction equation
[F:1][C:2]1[CH:3]=[C:4]([CH:26]=[C:27]([F:40])[C:28]=1[O:29][Si:30]([CH:37]([CH3:39])[CH3:38])([CH:34]([CH3:36])[CH3:35])[CH:31]([CH3:33])[CH3:32])[CH2:5][CH:6](/[CH:17]=[CH:18]/[C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][C:20]=1[OH:25])[CH2:7][CH2:8][C:9]1[CH:16]=[CH:15][C:12]([C:13]#[N:14])=[CH:11][CH:10]=1.C(=O)([O-])[O-].[K+].[K+].[C:47]([C:51]1[CH:58]=[CH:57][C:54]([CH2:55]Br)=[CH:53][CH:52]=1)([CH3:50])([CH3:49])[CH3:48]>C(#N)C.C(OCC)(=O)C>[C:47]([C:51]1[CH:52]=[CH:53][C:54]([CH2:55][O:25][C:20]2[CH:21]=[CH:22][CH:23]=[CH:24][C:19]=2/[CH:18]=[CH:17]/[CH:6]([CH2:5][C:4]2[CH:26]=[C:27]([F:40])[C:28]([O:29][Si:30]([CH:37]([CH3:39])[CH3:38])([CH:34]([CH3:36])[CH3:35])[CH:31]([CH3:32])[CH3:33])=[C:2]([F:1])[CH:3]=2)[CH2:7][CH2:8][C:9]2[CH:10]=[CH:11][C:12]([C:13]#[N:14])=[CH:15][CH:16]=2)=[CH:57][CH:58]=1)([CH3:50])([CH3:48])[CH3:49]

Participants

6

Reactant 3

HCID 11430Potassium CarbonateHCID 878361-(Bromomethyl)-4-(1,1-dimethylethyl)benzeneHCID 579719094-[(4E)-3-{3,5-difluoro-4-[(triisopropylsilyl)oxy]benzyl}-5-(2-hydroxyphenyl)pent-4-en-1-yl]benzonitrile

Product 1

HCID 57971908E-4-[5-[2-(4-tert-Butylbenzyloxy)phenyl]-3-(3,5-difluoro-4-triisopropylsilanyloxybenzyl)pent-4-enyl]benzonitrile

Reagents, catalysts & solvents 2

HCID 6342AcetonitrileSolventHCID 8857Ethyl AcetateSolvent

Procedure

1.7 g (3 mmol) of 4-[(4E)-3-{3,5-difluoro-4-[(triisopropylsilyl)oxy]benzyl}-5-(2-hydroxyphenyl)pent-4-en-1-yl]benzonitrile in 35 ml of acetonitrile are mixed with 627 mg (4.5 mmol) of potassium carbonate and 1 g (4.5 mmol) of 4-tert-butylbenzyl bromide and stirred under reflux for 12 hours. The solvent is stripped off in vacuo, and the residue is taken up in ethyl acetate. The organic phase is washed once with sodium bicarbonate solution and once with sodium chloride solution, dried over sodium sulfate and concentrated. The crude product is purified by flash chromatography on silica gel (mobile phase: cyclohexane/ethyl acetate 10:1). 628 mg (85% purity, 0.76 mmol, 25% of theory) of the title compound are obtained.

Workup

  1. temperatureunder reflux for 12 hours
  2. washThe organic phase is washed once with sodium bicarbonate solution and once with sodium chloride solution
  3. dry with materialdried over sodium sulfate
  4. concentrationconcentrated
  5. customThe crude product is purified by flash chromatography on silica gel (mobile phase: cyclohexane/ethyl acetate 10:1)

Sources & evidence

ORD record
ord-a3c43b95ea1746b9b2e647c22ef85fd2
Source dataset
uspto-grants-2012_05
Patent number
US08173704B2

Reaction notes

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