Editing Phenols (section)

===Other reactions===<!-- This section is linked from [[Organic reaction]] -->
Phenols undergo [[esterification]]. Phenol esters are [[active ester]]s, being prone to [[hydrolysis]]. Phenols are [[Reactivity (chemistry)|reactive]] species toward [[oxidation]]. Oxidative cleavage, for instance cleavage of [[1,2-dihydroxybenzene]] to the monomethylester of 2,4-hexadienedioic acid with oxygen, [[copper chloride]] in [[pyridine]].<ref>2,4-Hexadienedioic acid, monomethyl ester, (Z,Z)- [[Organic Syntheses]], Coll. Vol. 8, p. 490 (1993); Vol. 66, p. 180 (1988) [http://www.orgsynth.org/orgsyn/prep.asp?prep=cv8p0490 Article].</ref> Oxidative de-aromatization to [[quinone]]s also known as the [[Teuber reaction]]. Oxidizing reagents are [[Fremy's salt]]<ref>{{cite journal |year=1972 |title=2,5-Cyclohexadiene-1,4-dione, 2,3,5-trimethyl |journal=Organic Syntheses |volume=52 |page=83}}</ref> and [[oxone]].<ref>{{cite journal |last1=Carreño |first1=M. Carmen |last2=González-López |first2=Marcos |last3=Urbano |first3=Antonio |year=2006 |title=Oxidative De-aromatization of para-Alkyl Phenols into para-Peroxyquinols and para-Quinols Mediated by Oxone as a Source of Singlet Oxygen |journal=[[Angewandte Chemie International Edition]] |volume=45 |issue=17 |pages=2737–2741 |doi=10.1002/anie.200504605 |pmid=16548026}}</ref> In reaction depicted below 3,4,5-trimethylphenol reacts with [[singlet oxygen]] generated from [[oxone]]/[[sodium carbonate]] in an [[acetonitrile]]/water mixture to a para-peroxyquinole. This [[hydroperoxide]] is reduced to the quinole with [[sodium thiosulfate]].
:[[Image:OxonePhenolDearomatization.png|600px|Oxone phenol dearomatization]]
Phenols are oxidized to [[hydroquinone]]s in the [[Elbs persulfate oxidation]].

Reaction of naphtols and hydrazines and sodium bisulfite in the [[Bucherer carbazole synthesis]].