Abstract
Oxidation of both (E)- and
(Z)-2,6-dimethoxy-4-propenylphenol (3c) and (3d) with 1 equiv. of ferric
chloride gives the 2-aryl ethers of erythro and threo 1-arylpropan-1,2-diols
(1) and (2) (55%) which are formed by C-O coupling. The configurations of aryl ethers
(1) and (2) were determined from p.m.r. and i.r. spectral data. Other products
of the oxidation of phenol (3c) include the C-C-coupled 1-aryltetralin isomers
(4) and the dihydronaphthalene (5), the 1-arylindane dimer (6), and 2,6-dimethoxy-1,4-benzoquinone.
Oxidation of phenol (3c) with excess ferric chloride yields some oligomeric C-O-coupled
material in addition to compounds (1) and (2).
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