| 摘要 |
1370965 Brominated bisphenols GENERAL ELECTRIC CO 9 May 1972 [5 Aug 1971] 21502/72 Heading C2C The invention comprises compounds of formula wherein R 1 , R 2 , R 3 and R 4 are primary C 1 -C 8 alkyl, cyclohexyl, phenyl or 4-bromophenyl and each X is H when R 1 , R 2 , R 3 or R 4 is other than primary C 1 -C 8 alkyl and each X is bromine when R 1 , R 2 , R 3 and R 4 are primary C 1 -C 8 alkyl. These compounds may be prepared by reacting a diphenoquinone of the formula wherein R 1 , R 2 , R 3 and R 4 have the same meanings as above, with bromine.
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