Propose an efficient synthesis for the following transformation:

The transformation above can be performed with some reagent or combination of the reagents listed below. Give the necessary

reagent$($s$)$ in the correct order, as a string of letters $($without spaces or punctuation, such as "EBF"$).$ If there is more than one correct

solution, provide just one answer.

A

$B{r}_2$

D

dilute $H_{2}S{O}_4$

G

$B{H}_3*THF$

$H_2{O}_2,H_{2}O$

B

$NaN{H}_2$

E

$H_2,$ Lindlar's catalyst

$H$

$xsNaN{H}_2$

$H_{2}O$

C

$Na,N{H}_3(l)$

F

Mel

I