Organic Chemistry synthesis problem. Please show some explaination as to why you

Question

Organic Chemistry synthesis problem. Please show some explaination as to why you choose the reagent. Thanks!

A) NBS B) Br_2, CCI_4 C) Cl_2, CCI_4 D) HBr E) HBr, ROOR F) H_2O G) Hg (OAc)_2, NaOH, H) HgSO_4, H_2O, H_2 SO_4 I) H_3O^+ (workup) J) Dicyciohexyborane K) BH_3 L) H_2O_2, NaOH, H_2O M) Pd N) Lindiar's Catalyst O) 1% Pd (OAC)_2, R_3 P P) NaBH_4, CH_3 CH_2 OH Q) CH_3 CH_2 ONa, CH_3 CH_2 OH R) (CH_3)_3 COH S) NaNH_2, NH_3 T) Na, NH_3 U) H_2 V) O_3 W) Zn, CH_3 COOH X) CrO_3, H_2SO_4, H_2O Y) CH_3 CH_2 Br Z) CH_3 CH_2 CH_2 Br AA) CH_3 CH_2 Li AB) CH_3 CH_2 CH_2 Li AC) AD) AE) AF) AG) AH) AI) Look at the given synthesis and the provided reagents. Fill in the blanks with the single letter code of the appropriate reagent, or the appropriate descriptive vocabulary word/phrase to complete the description. Remember the computer is very literal so check your spelling carefully. First we add reagents to form the anion, then add reagent to act as an electrophile for a mechanism. Then we add reagent followed by reagent to give the product with regioselectivity. The initial product of this reaction series contains a(n) functional group which rearranges to the final product via a mechanism. If instead we wanted to form 2-pentanone we'd use reagent in the last step to add the oxygen with regioselectivity.

Explanation / Answer

First we add reagent S to form the cabanion anion, then add reagent Z to act as an electrophile for a Sn2 mechanism. the we add K followed by reagent L to give product with syn regioselectivity. The initial product of this reaction series contain a(n) alcohol fucntional group which rearranges to the final product via a tautomerization mechanism. If instead we wanted to form 2-pentanone we'd use reagent H reagent in the last step to add the oxygen with anti regioselectivity.

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