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Class Information
Number: 568/730
Name: Organic compounds -- part of the class 532-570 series > Organic compounds (class 532, subclass 1) > Oxygen containing (e.g., perchlorylbenzene, etc.) > Hydroxy containing (h of -oh may be replaced by a group ia or iia light metal) > Benzene ring containing > Phenols (h of -oh may be replaced by a group ia or iia light metal) > Polyphenols > Two phenols bonded directly to each other
Description: Compounds wherein two phenolic nuclei are bonded directly to each other.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8519197 Synthesis of magnolol and its analogue compounds Aug. 27, 2013
8283501 Optically active 2,2'-biphenol derivative and production method of same Oct. 9, 2012
8168833 Schwartz reagents: methods of in situ generation and use May. 1, 2012
7838618 Process for the production of phenylene ether oligomer Nov. 23, 2010
7737310 Method for producing biphenols from monophenols Jun. 15, 2010
7608741 Mass separation method of magnolol from Magnoliae cortex radix Oct. 27, 2009
7002046 Process for the recovery of dihydroxybiaryl compounds Feb. 21, 2006
6891072 Process for production of dimers or aromatic monohydroxyl compounds May. 10, 2005
6844462 Biphenydiols Jan. 18, 2005
6835859 Method for continuously producing 3,3',5,5'-tetra-t-butyl-4,4'-biphenol Dec. 28, 2004
6833482 Method for production of bis(hydroxy-aromatic)compounds Dec. 21, 2004
6794548 Method of producing 4,4'-biphenol Sep. 21, 2004
6689920 Bifunctional biphenyl and process for producing bifunctional phenylene ether oligomer compound using the same Feb. 10, 2004
6689921 Preparation of biphenols by oxidative coupling of alkylphenols using a recyclable copper catalyst Feb. 10, 2004
6555718 Process for preparing 3,3',6,6'-tetraalkyl-2,2'-biphenols and 3,3',6,6'-tetraalkyl-5,5'-dihalo-2,2'-biphenols Apr. 29, 2003
6512149 Method for removing butyl groups from butyl phenol compounds Jan. 28, 2003
6489517 Process for preparing 3,3',6,6'-tetraalkyl-2,2'-biphenols and 3,3',6,6'-tetraalkyl-5,5'-dihalo-2,2'-biphenols Dec. 3, 2002
6476277 Process for preparing hydroxyaromatics Nov. 5, 2002
6441248 Preparation of biphenols by oxidative coupling of alkylphenols using copper catalyst Aug. 27, 2002
6433236 Acid catalyzed isomerization of substituted diaryls Aug. 13, 2002
6365775 Biphenyl compounds and their use as oestrogenic agents Apr. 2, 2002
6147119 Biphenyl compounds and use thereof as oestrogenic agents Nov. 14, 2000
6118029 Process for producing 3,3',5,5'-tetra-t butylbiphenol Sep. 12, 2000
6077979 Manufacture of 3,3',5,5'-tetramethyl-2,2'-biphenol Jun. 20, 2000
5767327 Method using aromatic oxidizing agents Jun. 16, 1998
5583267 Biocatalytic process for preparing tetraalkylbiphenols Dec. 10, 1996
5324868 Method for preparing 4,4'-biphenol Jun. 28, 1994
5276214 Optically active biphenyl derivative and process for optical resolution Jan. 4, 1994
5245086 Hydroxylation of phenols/phenol ethers Sep. 14, 1993
5243016 Polymers and copolymers of high glass transition temperature from hindered phenols Sep. 7, 1993
5202433 Polysaccharide derivatives as separating agents Apr. 13, 1993
5202504 Optically active biphenyl derivative and process for optical resolution Apr. 13, 1993
5196605 Process for the preparation of pure 4,4'-dihydroxybiphenyl Mar. 23, 1993
5182358 Polymers and copolymers of high glass transition temperature from hindered phenols Jan. 26, 1993
5177258 Method of production of biaryl derivatives Jan. 5, 1993
5130356 Molding for optical purposes Jul. 14, 1992
5099076 Method for preparing p,p'-biphenol Mar. 24, 1992
5091592 Process for preparing 4,4'-dihydroxybiphenyl Feb. 25, 1992
5087768 Process for the purification of dihydroxybiphenyls Feb. 11, 1992
RE33779 Preparation process of 4,4-dihydroxybiphenyl Dec. 24, 1991
5068463 Process for the preparation of tetrabromo-4,4'-alkylidenediphenols Nov. 26, 1991
5053548 Biphenyl derivative composition for nerve cell degeneration repairing or protective agent and process for preparing a phenyl derivative contained in the composition Oct. 1, 1991
5008472 Preparation of 4,4"-dihydroxyterphenyl Apr. 16, 1991
5001282 Method of treating diabetes mellitus with bisphenol derivatives Mar. 19, 1991
4962240 Method for symmetrically dimerizing phenols and process for producing biphenols Oct. 9, 1990
4950808 Process for the preparation of 4,4'-dihydroxybiphenyl Aug. 21, 1990
4939306 Preparation process of 4,4'-biphenol, precursor of same and preparation process of precursor Jul. 3, 1990
4922031 Preparation of 4,4'-dihydroxybiphenyl May. 1, 1990
4902837 Process for preparing Biphenols Feb. 20, 1990
4891453 Process for producing p,p'-biphenol Jan. 2, 1990

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