Methyl 3,5-dichloro-4-hydroxybenzoate → 4,4'-[1,4-Phenylenebis([2,2-dimethyl-1,3-propanediyl]-oxycarbonyl)]bis(2,6-dichlorophenol)

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Reaktionsschritte

A mechanically stirred mixture of 0.6 g of calcium acetate, 0.6 g of antimony oxide, 3.75 g (0.15 M) of 1,4-bis(3-hydroxy-2,2-dimethylpropyl)benzene and 132 g (0.6 M) of methyl 3,5-dichloro-4-hydroxybenzoate was heated under nitrogen atmosphere at 200° C for 18 hours. The reaction mixture was washed three times with benzene in a Waring Blendor and extracted for 5 days with 2 liters of hot benzene. The extract, on cooling, yielded 70 g of 4,4'-[1,4-phenylenebis([2,2-dimethyl-1,3-propanediyl]-oxycarbonyl)]bis(2,6-dichlorophenol) melting at 203°-204° C. The infrared spectrum was consistent with the indicated structure. The compound contained 3.185 meq. of OH/g indicating a molecular weight of 628 for the bisphenol.

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