Synthesis of the muscalure from acetylene and other required reagents is to be devised. Concept introduction: Terminal alkynes can be converted into internal alkynes by forming new C − C bond. This bond is formed by treatment of alkyne with strong base and alkyl halide . The addition of H 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 presence of Lindlar catalyst, alkyne is reduced to c i s -alkene .

Question

when performing the reaction that involves 2 equivalents of 3-(diethylamino)-phenol and Phthalic anhydride with sulfuric acid and water react to form rhodamine b where the Phthalic anhydride cleaves in acid and how does Excessive Washing (w/ Base) & Subsequent Resonance Structure get affected

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Question

Chapter 12, Problem 58P

Interpretation Introduction

Interpretation: Synthesis of the muscalure from acetylene and other required reagents is to be devised.

Concept introduction: Terminal alkynes can be converted into internal alkynes by forming new C−C bond. This bond is formed by treatment of alkyne with strong base and alkyl halide.

The addition of H2 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 presence of Lindlar catalyst, alkyne is reduced to cis-alkene.

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