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Synthesis of the diepoxide (diglycidyl ether) of 3,3′,5,5′-tetrabromobisphenol A (ETBBA) (See, Wang et al. J Appl Polym Sci 1991; 43: 1315-1321.) ETBBA was prepared in a similar manner as BEDB, using TBBA (24.9 g) instead of BHDB. This gave ETBBA (25.4 g, 85%). 1H-NMR (CDCl3, ppm): 7.30 (s, 4H, Ar—H), 4.21-4.18 (q, 2H, 2(—O—CH2-oxirane)), 4.09-4.05 (q, 2H, 2(—O—CH2-oxirane)), 3.51-3.46 (m, 2H, 2(oxirane CH2)), 2.92-2.90 (t, 2H, 2(oxirane CH2)), 2.75-2.74 (q, 2H, 2(oxirane CH2)), 1.60 (s, 6H, Ar—C(CH3)2—Ar).

1. customwas prepared in a similar manner as BEDB