Alpha-Methylstyrene → 2-[2,4-Dihydroxy-5-(1-methyl-1-phenylethyl)phenyl]-4,6-bis-(2,4-dimethylphenyl)-s-triazine

HRID 743853Notes

Reaction equation

HRID 743853 reaction equation
[OH:1][C:2]1[CH:7]=[C:6]([OH:8])[CH:5]=[CH:4][C:3]=1[C:9]1[N:14]=[C:13]([C:15]2[CH:20]=[CH:19][C:18]([CH3:21])=[CH:17][C:16]=2[CH3:22])[N:12]=[C:11]([C:23]2[CH:28]=[CH:27][C:26]([CH3:29])=[CH:25][C:24]=2[CH3:30])[N:10]=1.[CH3:31][C:32]([C:34]1[CH:39]=[CH:38][CH:37]=[CH:36][CH:35]=1)=[CH2:33]>C(OCC)(=O)C.CC(C)[O-].[Al+3].CC(C)[O-].CC(C)[O-]>[OH:1][C:2]1[CH:7]=[C:6]([OH:8])[C:5]([C:32]([CH3:33])([C:34]2[CH:39]=[CH:38][CH:37]=[CH:36][CH:35]=2)[CH3:31])=[CH:4][C:3]=1[C:9]1[N:10]=[C:11]([C:23]2[CH:28]=[CH:27][C:26]([CH3:29])=[CH:25][C:24]=2[CH3:30])[N:12]=[C:13]([C:15]2[CH:20]=[CH:19][C:18]([CH3:21])=[CH:17][C:16]=2[CH3:22])[N:14]=1

Participants

5

Reactant 2

HCID 7407Alpha-Methylstyrene2×HCID 742762-(2,4-Dihydroxyphenyl)-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine

Product 1

HCID 1358436032-[2,4-Dihydroxy-5-(1-methyl-1-phenylethyl)phenyl]-4,6-bis-(2,4-dimethylphenyl)-s-triazineYield 67.7%

Reagents, catalysts & solvents 2

HCID 11143Aluminum isopropoxideCatalystHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
175 °C

Procedure

To a 1 L three-necked, round-bottomed flask equipped with a magnetic stirrer, condenser, dropping funnel, thermometer, and a nitrogen atmosphere are charged 15.0 g (37.8 mmol) of 2-(2,4-dihydroxyphenyl)-4,6-bis-(2,4-dimethylphenyl)-s-triazine and 390 mg of aluminum isopropoxide. The mixture is heated to 175° C. and 4.47 g (37.9 mmol) of α-methylstyrene are added dropwise at a rate of one drop every two seconds. A total of six equivalents of a-methyl styrene are added in this fashion over a 4.5 hour period. After cooling to room temperature, the mixture is diluted with ethyl acetate, washed twice with water and once with brine, and is dried over anhydrous magnesium sulfate. Following filtration, the solvent is removed under reduced pressure to yield a yellow solid. The crude product is purified with medium pressure chromatography with 12% ethyl acetate/heptane to afford 13.2 g of the title compound as a yellow solid; mp 168°-170° C.

Workup

  1. customTo a 1 L three-necked, round-bottomed flask equipped with a magnetic stirrer, condenser
  2. temperatureAfter cooling to room temperature
  3. washwashed twice with water and once with brine
  4. dry with materialis dried over anhydrous magnesium sulfate
  5. filtrationfiltration
  6. customthe solvent is removed under reduced pressure
  7. customto yield a yellow solid
  8. customThe crude product is purified with medium pressure chromatography with 12% ethyl acetate/heptane

Sources & evidence

ORD record
ord-d27f0bf838cb4149a9b032b5a45ea7af
Source dataset
uspto-grants-1996_09
Patent number
US05556973

Reaction notes

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