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 t$-$BuOK

E

$H_2,$ Lindlar's cat.

I

$($:$LiAl{H}_4$;$2\}$

B

$HBr,\frac{R}{O}OR$

F

MeMgBr; $2)H_3{O}^{+}$

J

DMP or PCC

DMP or PCC

conc. $H_{2}S{O}_4,$ heat

conc. $H_{2}S{O}_4,$ heat

$B{H}_3*THF$; $2)H_2{O}_2,$NaOH

C

$N{a}_{2}C{r}_2{O}_7,H_{2}S{O}_4,H_{2}O$

G

$H$

TsCl$,$ py

K

L

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

D

$HBr$

Quest

Multiste

Quest

Fill in th

Quest

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