i) Demonstrate your understanding of retrosynthetic analysis by redrawing step (iii) in the retrosynthetic direction. Show the disconnection, retrosynthetic arrow, and synthons corresponding to the starting materials. 

ii) Two separate reactions are achieved in step (iv). Briefly explain what each of these is and use your answer to illustrate why the tert - butyl oxy carbonyl (Boc) protecting group used for protection of 5 was a better choice than the use of a fluorenyl-methyl carbonyl group (Fmoc).

0a base ca TOH 6MHO C. 24 h Boc Fmoe