Methyltriphenylphosphonium iodide → 3,5-Bis(3',5'-di-t-butylstyryl)styrene

HRID 411931Notes

Reaction equation

HRID 411931 reaction equation
[I-].[CH3:2][P+](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.CC(C)([O-])C.[K+].[C:28]([C:32]1[CH:33]=[C:34]([CH:61]=[C:62]([C:64]([CH3:67])([CH3:66])[CH3:65])[CH:63]=1)[CH:35]=[CH:36][C:37]1[CH:38]=[C:39]([CH:42]=[C:43]([CH:45]=[CH:46][C:47]2[CH:52]=[C:51]([C:53]([CH3:56])([CH3:55])[CH3:54])[CH:50]=[C:49]([C:57]([CH3:60])([CH3:59])[CH3:58])[CH:48]=2)[CH:44]=1)[CH:40]=O)([CH3:31])([CH3:30])[CH3:29]>O1CCCC1>[C:28]([C:32]1[CH:33]=[C:34]([CH:61]=[C:62]([C:64]([CH3:67])([CH3:66])[CH3:65])[CH:63]=1)[CH:35]=[CH:36][C:37]1[CH:38]=[C:39]([CH:42]=[C:43]([CH:45]=[CH:46][C:47]2[CH:52]=[C:51]([C:53]([CH3:56])([CH3:55])[CH3:54])[CH:50]=[C:49]([C:57]([CH3:60])([CH3:59])[CH3:58])[CH:48]=2)[CH:44]=1)[CH:40]=[CH2:2])([CH3:31])([CH3:30])[CH3:29]

Participants

5

Reactant 3

HCID 638159Methyltriphenylphosphonium iodideHCID 23665647Potassium tert-butoxideHCID 540286873,5-Bis[2-(3,5-di-tert-butylphenyl)ethenyl]benzaldehyde

Product 1

HCID 538517063,5-Bis(3',5'-di-t-butylstyryl)styreneYield 99%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

Dry tetrahydrofuran (300 ml) was added to a mixture of methyltriphenylphosphonium iodide (17.00 g, 42.0 mmoles) and potassium t-butoxide (4.72 g, 42.0 mmoles) and stirred at room temperature for 10 minutes. 3,5-bis(3′,5′-di-t-butylstyryl)benzaldehyde (17.00 g, 42.0 mmoles) was then added and the reaction mixture was stirred at room temperature for 75 minutes. The solvent was then evaporated and the remaining sludge was triturated with dichloromethane-pet.ether (40-60) (1:9) and filtered through silica, rinsing thoroughly with the same solvent mixture. The solvent was evaporated to give 3,5-bis(3′,5′-di-t-butylstyryl)styrene (14.83 g, 99%), mp 150° C. (Found: C, 90.03; H, 9.98. C40H52 requires C, 90.16; H, 9.84%); λmax(CHCl3)/nm 318 (ε/dm3 mol-1 cm-1 68500); δH(500 MHz; CDCl3) 1.39 (36H, s, tBu), 5.34 (1H, d, J 11, 8-H), 5.88 (1H, d, J 18, 8-H), 6.79 (1H, dd, J 11 and 18, 7-H), 7.15 (2H, d, J 16, 7′-H), 7.25 (2H, d, J 16, 8′-H), 7.38 (2H, t, J 1.75, 1′-H), 7.42 (4H, d, J 1.75, 3′, 5′-H), 7.49 (2H, d, J 1.3, 3,5-H), 7.63 (1H, m, 1-H).

Workup

  1. stirringthe reaction mixture was stirred at room temperature for 75 minutes
  2. customThe solvent was then evaporated
  3. customthe remaining sludge was triturated with dichloromethane-pet
  4. filtrationether (40-60) (1:9) and filtered through silica
  5. washrinsing thoroughly with the same solvent mixture
  6. customThe solvent was evaporated

Sources & evidence

ORD record
ord-a4483e7901e04a70aeec0449238f57e2
Source dataset
uspto-grants-2003_05
Patent number
US06558818B1

Reaction notes

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