75467-59-3

Upstream product

• 91-10-1 1,3-dimethoxy-2-hydroxy-benzene 
• 128-39-2 2,6-di-tert-butylphenol 
• 28096-16-4 2,6-di-tert-butyl-4-propionylphenoxy radical 
• 950-57-2 4-bromo-2,6-di-tert-butylcyclohexa-2,5-dienone 

Relevant academic research and scientific papers

Choice of Manganese(III) Complexes for the Synthesis of 4,4'-Biphenyldiols and 4,4'-Diphenoquinones

2,6-Disubstituted phenols are oxidized with tris(2,4-pentanedionato)manganese(III), , in glacial acetic acid to give the corresponding 4,4'-biphenyldiols in high yields, whereas similar reactions using manganase(III) acetate, , instead of quantitatively yield the corresponding 4,4'-diphenoquinones.Cross-coupling reactions of 2,6-di-t-butylphenol and other substituted phenols afford the corresponding cross-coupled 4,4'-biphenyldiols and 4,4'-diphenoquinones together with oxidation products derived from them starting phenols themselves.The advantageous use of and Mn(OAc)3> in the ubiqitous phenol coupling reaction is discussed.

Oxidation of 2,6-Dimethoxyphenol with 2,6-Di-tert-butyl-4-propionylphenoxy Radical. Evidence for the Formation of an Intermediate "Radical Pair"

In the title reaction an intermediate is formed which is stable at temperatures below -10 deg C.It gives no EPR signal.Warming leads to the formation of coerulignone and poly-2,6-dimethoxyphenylene oxide.Acid hydrolysis at low temperatures leads to cross-coupled products.The results are discussed in terms of a two-stage reaction mechanism for the formation of a bond between two phenoxy radicals.