Abstract
Chlorination of xanthenone by thionyl chloride gave an intermediate 9,9-dichloroxanthene.The obtained chlorinated product is free of further isolation and purification and can react with o-cresol or 2,6-dimethylphenol for the preparation of two xthanenebiphenols including 9,9-bis(4-hydroxy-3-methylphenyl) xanthene and 9,9-bis(4-hydroxy-3,5-dimethylphenyl) xanthene with corresponding yields of 81% and 80.5%.Their structures were characterized by elemental analysis,FTIR,1H NMR and 13C NMR spectra.The present method has advantages such as mild reaction conditions,convenient manipulation and good yield.
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