Chapter 12.5, Problem 10P

Interpretation Introduction

Interpretation: The structure of $cis\text{-jasmone}$, formed by treatment of alkyne A with ${\text{H}}_{\text{2}}$ in the presence of the Lindlar catalyst is to be drawn.

Concept introduction: The addition of ${\text{H}}_{\text{2}}$ in presence of catalyst is known as catalytic hydrogenation reaction. Lindlar catalyst consists of palladium deposited on calcium carbonate which is poisoned or deactivated by lead or sulfur. In the presence of Lindlar catalyst, alkyne is reduced to $cis\text{-alkene}$.