Question: i) Suggest a structure for the missing reagent (G) in the Wittig reaction shown. (1 mark) ii) Is the reagent (H) a stabilized or non-stabilised

MeO. PPH3 Meo (H) Bn . (G) (F) OBn

i) Suggest a structure for the missing reagent (G) in the Wittig reaction shown. (1 mark)

ii) Is the reagent (H) a stabilized or non-stabilised ylide? Please justify your answer. (1 mark)

iii) Using the structures below as a guide, draw Newman projections to show the likely approach of the ylide (H) to the aldehyde (G). Ensure that you label any steric clashes or dipole moments that are of consequence and highlight which of the 2 approaches is favoured. (8 marks)

MeO. PPH3 Meo (H) Bn . (G) (F) OBn

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