Reactions of Substituted Hydroxybenzofurans. II

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Abstract
Bromination of 6‐methoxy‐2,3‐diphenylbenzofuran 1 b leads to the 5‐bromo derivative 5 a, whereas 5‐methoxy‐2,3‐diphenylbenzofuran 3b yields the 4,6‐dibromo derivative 4b.Nitration of 5‐hydroxy‐2,3‐diphenylbenzofuran 3a gave 6‐nitro‐5‐hydroxy‐2‐(p‐nitrophenyl)‐3‐phenylbenzofuran 8a. On the other hand, nitration of 3 b yields the mononitro derivative, namely the 5‐nitro compound 5 b.Bromination of 10a yields the 4‐bromo derivative 10 b.Oxidation of 5a, 4b, 8a, 10a, 5b and 10 b followed by hydrolysis gives the benzophenone derivatives 6c, 7b, 9b, 9b, 6f and 7c, respectively.Both 5 b and 10a were reduced to the corresponding amino derivatives.

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