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Q3. Write down detailed reaction mechanisms for the following transformations: (a) The keto-epoxide (A) cyclizes in acid to form the furan (B). (A) (B) (b)

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Q3. Write down detailed reaction mechanisms for the following transformations: (a) The keto-epoxide (A) cyclizes in acid to form the furan (B). (A) (B) (b) The pyridine compound E is formed when (C) and (D) and heated in acetic acid. (6 Marks) (C) (D) (E)

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