Examine Solved Problem 7.3. Your task is to prepare A in the highest possible yield by dehydrobromination. Which base would you use?

Solved Problem 7.3

Using Zaitsev’s rule, predict which would be the major product of the following reaction:

Strat egy and Answer: Alkene B has a trisubstituted double bond whereas the double bond of A is only monosubstituted. Therefore, B is more stable and, according to Zaitsev’s rule, would be the major product.

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or ELOH, 55 °C Br A B