`CH_(3)CH_(2)Cioverset(NaCN)rarrXoverset(Ni//H_(2))rarrYunderset("anhydride")overset(Acetic)rarrZ`
`Z` in the above reaction sequence is .

Options

A. `CH_(3)CH_(2)CH_(2)NHCOCH_(3)`
B. `CH_(3)CH_(2)CH_(2)NH_(2)`
C. `CH_(3)CH_(2)CH_(2)CONHCH_(3)`
D. `CH_(3)CH_(2)CH_(2)CONHCOCH_(3)` .

Answer

A

Explanation

Step (1) is nucleophilic substitution, yielding cyanide, step(2) involves reduction of cyanide to yield a `1^(@)` amine and step (3) involves acetylation of `1^(@)` amine.
`CH_(3)CH_(2)Ciunderset(-NaCI)overset(NaCN)rarrCH_(3)underset((X))(CH_(2))C-=Nunderset(H_(2))overset(Ni)rarr`
`underset((Y))(CH_(3)CH_(2)CH_(2)NH_(2))underset(-AcOH)overset(Ac_(2)O)rarr underset((Z))(CH_(3)CH_(2)CH_(2)NHCOCH_(3))`