Chapter 11, Problem 56P

Interpretation Introduction

Interpretation:

The starting material that gives the desired product on working backward is to be deduced.

Concept introduction:

Alkyl substituted benzene reacts with ${\text{KMnO}}_{\text{4}}$ in a basic medium to form carboxylic acid as a product.

Sodium amide is a strong base and helps in the formation of acetylnide, which can be changed to a bigger alkyne by adding alkylhalide.