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- W1562001098 abstract "Abstract The preparation of I‐hydroxy‐2 : 6‐bis‐(2‐hydroxybenzyl)benzene by dehalogenation of the corresponding trichloro compound was described in Part X of this series (Finn, Lewis & Megson, 1950). The removal of the chlorine was effected by treatment of the boiling amyl alcohol solution of the compound with sodium. The yield was poor and amounted to only 5% of theory. It has now been found that the dehalogenation can be achieved more satisfactorily by treatment of a solution of the diphenylmethane derivative in aqueous sodium hydroxide with Raney nickel‐aluminium alloy. A yield of about 50% of theory is obtained. 2 : 2′‐Dihydroxydiphenylmethane may be obtained from 2 : 2′‐dihydroxy‐5 : 5′‐dichloro‐diphenylmethane by the same means and the method has been used to prepare 2 : 2′‐dihydroxy‐3 : 5‐dimethyldiphenylmethane, 2 : 2′‐dihydroxy‐3 : 3′ : 5 : 5′‐tetramethyldiphenylmethane, and I‐hydroxy‐3 : 5‐dimethyl‐2 : 6‐bis‐(2‐hydroxybenzyl)benzene." @default.
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- W1562001098 date "1951-11-01" @default.
- W1562001098 modified "2023-10-09" @default.
- W1562001098 title "Formaldehyde condensations with phenol and its homologues. XII. The dehalogenation of halogenated diphenylmethanes having halogen substituents in the nucleus" @default.
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- W1562001098 doi "https://doi.org/10.1002/jctb.5010011109" @default.
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