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3. When A is treated with Pd(PPh;)4 in the presence of methyl acrylate, B is formed. When C is treated with Pd(PPh;)4 in the

3. When A is treated with Pd(PPh;)4 in the presence of methyl acrylate, B is formed. When C is treated with Pd(PPh;)4 in the presence of methyl acrylate, D is formed. Provide a mechanism for each reaction and explain the difference in the reaction pathways. CO,Me Br Pd(PPh,)4 EtN CO,Me methyl acrylate A Br Pd(PPh,). EtN CO,Me methyl acrylate

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