Question

You need to synthesize 3-octyne from ethyne ("acetylene") and abromoalkane. From the reagent table below, select the reagent(s)you would use to accomplish your goal. (Select "none" if no furtherreagents are needed. If there are multiple possibilities, give theshortest route.)
*Could you please explain how to answer this question and what todo for each step?



1° reagent
1 equiv. 1-bromomethane
1 equiv. 1-bromoethane
1 equiv. 1-bromopropane
1 equiv. 1-bromobutane
1 equiv. 1-bromopentane
1 equiv. 1-bromohexane
1 equiv. 1-bromoheptane
1 equiv. 1-bromooctane
conc. H2SO4, heat
1 equiv. KOCH2CH3, HOCH2CH3
1 equiv. NaNH2, NH3
1 equiv. Na, NH3
1 equiv. PBr3
1 equiv. peroxyacetic acid
Zn(Hg), HCl
none

2° reagent
1 equiv. 1-bromomethane
1 equiv. 1-bromoethane
1 equiv. 1-bromopropane
1 equiv. 1-bromobutane
1 equiv. 1-bromopentane
1 equiv. 1-bromohexane
1 equiv. 1-bromoheptane
1 equiv. 1-bromooctane
conc. H2SO4, heat
1 equiv. KOCH2CH3, HOCH2CH3
1 equiv. NaNH2, NH3
1 equiv. Na, NH3
1 equiv. PBr3
1 equiv. peroxyacetic acid
Zn(Hg), HCl
none

3° reagent
1 equiv. 1-bromomethane
1 equiv. 1-bromoethane
1 equiv. 1-bromopropane
1 equiv. 1-bromobutane
1 equiv. 1-bromopentane
1 equiv. 1-bromohexane
1 equiv. 1-bromoheptane
1 equiv. 1-bromooctane
conc. H2SO4, heat
1 equiv. KOCH2CH3, HOCH2CH3
1 equiv. NaNH2, NH3
1 equiv. Na, NH3
1 equiv. PBr3
1 equiv. peroxyacetic acid
Zn(Hg), HCl
none

4° reagent
1 equiv. 1-bromomethane
1 equiv. 1-bromoethane
1 equiv. 1-bromopropane
1 equiv. 1-bromobutane
1 equiv. 1-bromopentane
1 equiv. 1-bromohexane
1 equiv. 1-bromoheptane
1 equiv. 1-bromooctane
conc. H2SO4, heat
1 equiv. KOCH2CH3, HOCH2CH3
1 equiv. NaNH2, NH3
1 equiv. Na, NH3
1 equiv. PBr3
1 equiv. peroxyacetic acid
Zn(Hg), HCl
none