Question

There are two paths to prepare a compound $\left(A\right)(2-methyl-hex-1en-3-yne)$. Which of the following statements is correct ?

• A. Path $I$ is feasible.
• B. Path $II$ is feasible.
• C. Both paths are feasible.
• D. Both paths are not feasible.

Answer 1

The correct option is B Path $II$ is feasible.

Path II is feasible.

In path I, $S_{N}2$ reaction is not possible because RX is unreactive vinyl bromide. In Path II, nucleophilic addition reaction is favored- anion $C{H}_3-C{H}_2-C\equiv C^{-}$ is a strong nucleophile- to give the product which on dehydration gives compound A.