Triphenylphosphine → HCID 136335798, compound

HRID 1801422Notes

Reaction equation

HRID 1801422 reaction equation
I[C:2]1[CH:7]=[C:6]([CH3:8])[C:5]([C:9]2[C:14]([CH3:15])=[CH:13][N:12]=[CH:11][C:10]=2[CH3:16])=[C:4]([CH3:17])[CH:3]=1.[C:18]([C:22]1[CH:27]=[C:26]([CH:28]=[CH2:29])[CH:25]=[C:24]([C:30]([CH3:33])([CH3:32])[CH3:31])[C:23]=1[OH:34])([CH3:21])([CH3:20])[CH3:19].C1C=CC(P(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>CC([O-])=O.CC([O-])=O.[Pd+2]>[C:18]([C:22]1[CH:27]=[C:26]([CH:28]=[CH:29][C:2]2[CH:7]=[C:6]([CH3:8])[C:5]([C:9]3[C:14]([CH3:15])=[CH:13][N:12]=[CH:11][C:10]=3[CH3:16])=[C:4]([CH3:17])[CH:3]=2)[CH:25]=[C:24]([C:30]([CH3:33])([CH3:32])[CH3:31])[C:23]=1[OH:34])([CH3:21])([CH3:20])[CH3:19]

Participants

5

Reactant 3

HCID 11776TriphenylphosphineHCID 125766802,6-Di-tert-butyl-4-vinylphenolHCID 58510520HCID 58510520, compound

Product 1

HCID 136335798HCID 136335798, compoundYield 91.2%

Reagents, catalysts & solvents 1

HCID 167845palladium(II) acetateCatalyst

Conditions

Temperature
100 °C

Procedure

A flame-dried sealable Schlenk tube was charged with 11 (1.69 g, 5.0 mmol), 12 (2.32 g, 10.0 mmol), Pd(OAc)2 (112 mg, 0.50 mmol), and PPh3 (131 mg, 0.50 mmol), evacuated, and then backfilled with N2. Next, dry Et3N (10 mL) was added under an N2 flow. The Schlenk tube was next sealed, the mixture was degassed by 3 freeze-thaw cycles, and backfilled with N2. The Schlenk tube was then wrapped with aluminum foil and stirred at 100° C. for 36 h. The reaction mixture was then cooled to room temperature, diluted with methylene chloride (50 mL), filtered through a thin pad of silica gel, and concentrated in vacuo to afford a red solid. The crude product was purified by flash chromatography on silica gel, eluting with 3:1 hexane:ethyl acetate to give the title compound 2.01 g (91.2%) as a colorless solid: mp 234-235° C.; 1H NMR (400 MHz, CDCl3): δ 8.402 (s, 2H), 7.371 (s, 2H), 7.307 (s, 2H), 7.133 (d, 1H, J=16.4 Hz), 6.936 (d, 1H, J=16.0 Hz), 5.331 (s, 1H), 1.951 (s, 6H), 1.911 (s, 6H), 1.499 (s, 18H); 13C NMR (100 MHz, CDCl3): δ 153.971, 148.630, 148.502, 137.347, 136.301, 135.928, 134.817, 131.251, 129.595, 128.876, 125.837, 125.709, 123.598, 34.638, 30.534, 19.997, 16.822; HRMS (EI): m/z 441.3023 [M+]; calcd, 441.3032; Anal. Calcd. for C31H39NO.H2O: C, 81.00; H, 8.99; N, 3.05. Found; C, 81.01; H, 8.64; N, 3.02.

Workup

  1. customevacuated
  2. additionNext, dry Et3N (10 mL) was added under an N2 flow
  3. customthe mixture was degassed by 3 freeze-thaw cycles
  4. temperatureThe reaction mixture was then cooled to room temperature
  5. additiondiluted with methylene chloride (50 mL)
  6. filtrationfiltered through a thin pad of silica gel
  7. concentrationconcentrated in vacuo
  8. customto afford a red solid
  9. customThe crude product was purified by flash chromatography on silica gel
  10. washeluting with 3:1 hexane

Sources & evidence

ORD record
ord-af20a4ace6b94c4e97aad0c1c9fdd949
Source dataset
uspto-grants-2013_01
Patent number
US08349222B2

Reaction notes

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