4,4'-Bis(2,6-di-tert-butylphenol) → 4,4'-Dihydroxybiphenyl

HRID 329490Notes

Reaction equation

HRID 329490 reaction equation
C(C1C=CC=C(CCCC)C=1O)CCC.C([C:20]1[CH:21]=[C:22]([C:31]2[CH:36]=[C:35](C(C)(C)C)[C:34]([OH:41])=[C:33](C(C)(C)C)[CH:32]=2)[CH:23]=[C:24](C(C)(C)C)[C:25]=1[OH:26])(C)(C)C>>[CH:23]1[C:22]([C:31]2[CH:36]=[CH:35][C:34]([OH:41])=[CH:33][CH:32]=2)=[CH:21][CH:20]=[C:25]([OH:26])[CH:24]=1

Participants

3

Reactant 2

HCID 671854,4'-Bis(2,6-di-tert-butylphenol)3×HCID 138275622,6-Dibutylphenol2×

Product 1

HCID 71124,4'-Dihydroxybiphenyl

Procedure

In producing p,p'-biphenol from a mixture of 2,6-di-butylphenol and 3,3',5,5'-tetra-t-butyl-4,4'-diphenoquinone or a mixture of 2,6-di-butylphenol, 3,3',5,5'-tetra-t-butyl-4,4'-diphenoquinone and 3,3',5,5'-tetra-t-butyl-4,4'-dihydroxybiphenyl in the process of the present invention, the reaction for the synthesis of 3,3',5,5'-tetra-t-butyl-4,4'-dihydroxybiphenyl and the reaction for the dealkylation of 3,3',5,5'-tetra-t-butyl-4,4'-dihydroxybiphenyl are performed at a reaction temperature of 120°-180° C. in the presence of a specified solvent and acid catalyst. Since p,p'-biphenol is directly obtained in one step without separating the 3,3',5,5'-tetra-t-butyl-4,4'-dihydroxybiphenyl that has been formed at the first stage, the present invention offers a simplified process for the production of p,p'-biphenol.

Workup

  1. customthe reaction
  2. customare performed at a reaction temperature of 120°-180° C. in the presence of a specified solvent and acid catalyst

Sources & evidence

ORD record
ord-9629d1440937450faebb2b63f4658df2
Source dataset
uspto-grants-1990_01
Patent number
US04891453

Reaction notes

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