Question: i. Suggest a structure for product B. ii. Draw a plausible mechanism for the conversion of the Pd(II) reagent PdCl2(PPh3)2 into the catalytically active Pd(0)

i. Suggest a structure for product B.

ii. Draw a plausible mechanism for the conversion of the Pd(II) reagent PdCl2(PPh3)2 into the catalytically active Pd(0) species. 6 marks

iii. The vinyl stannane used in this cross-coupling is extremely toxic. Suggest another organometallic reagent that could be used instead of the stannane. 1 mark

SnBuz Br PdCl2(PPH32 product (B) dioxane, A 91% (A)

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