The structure of Y is to be identified and the stepwise mechanism for the conversion of Y to rofecoxib is to be drawn. Concept introduction: Claisen condensation takes place between two esters or between an ester and a ketone . In crossed Claisen condensation reaction, a base abstracts an acidic proton from an α carbon atom of carbonyl compound to form an enolate. This enolate reacts with carbonyl group of other carbonyl compounds that lead to the formation of β -ketoester.

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Definition Definition Class of organic compounds that contain a carboxyl group ( - COOH ) and has a general formula R - COOH or R - CO 2 H , where R refers to the alkyl, alkenyl, aryl, or other groups. They can undergo different chemical reactions, such as acid-base reactions, esterification, and oxidation. These are essential components of living organisms, playing important roles in metabolic processes, signaling, and as pharmaceuticals.

Chapter 22, Problem 55P

Interpretation Introduction

Interpretation: The structure of Y is to be identified and the stepwise mechanism for the conversion of Y to rofecoxib is to be drawn.

Concept introduction: Claisen condensation takes place between two esters or between an ester and a ketone. In crossed Claisen condensation reaction, a base abstracts an acidic proton from an α carbon atom of carbonyl compound to form an enolate. This enolate reacts with carbonyl group of other carbonyl compounds that lead to the formation of β-ketoester.

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Definition Definition Class of organic compounds that contain a carboxyl group ( - COOH ) and has a general formula R - COOH or R - CO 2 H , where R refers to the alkyl, alkenyl, aryl, or other groups. They can undergo different chemical reactions, such as acid-base reactions, esterification, and oxidation. These are essential components of living organisms, playing important roles in metabolic processes, signaling, and as pharmaceuticals.

Chapter 22, Problem 55P

Interpretation Introduction

Interpretation: The structure of Y is to be identified and the stepwise mechanism for the conversion of Y to rofecoxib is to be drawn.

Concept introduction: Claisen condensation takes place between two esters or between an ester and a ketone. In crossed Claisen condensation reaction, a base abstracts an acidic proton from an α carbon atom of carbonyl compound to form an enolate. This enolate reacts with carbonyl group of other carbonyl compounds that lead to the formation of β-ketoester.

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Answer 3

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Definition Definition Class of organic compounds that contain a carboxyl group ( - COOH ) and has a general formula R - COOH or R - CO 2 H , where R refers to the alkyl, alkenyl, aryl, or other groups. They can undergo different chemical reactions, such as acid-base reactions, esterification, and oxidation. These are essential components of living organisms, playing important roles in metabolic processes, signaling, and as pharmaceuticals.

Chapter 22, Problem 55P

Interpretation Introduction

Interpretation: The structure of Y is to be identified and the stepwise mechanism for the conversion of Y to rofecoxib is to be drawn.

Concept introduction: Claisen condensation takes place between two esters or between an ester and a ketone. In crossed Claisen condensation reaction, a base abstracts an acidic proton from an α carbon atom of carbonyl compound to form an enolate. This enolate reacts with carbonyl group of other carbonyl compounds that lead to the formation of β-ketoester.

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Check out a sample textbook solution

See solution

Answer 4

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Definition Definition Class of organic compounds that contain a carboxyl group ( - COOH ) and has a general formula R - COOH or R - CO 2 H , where R refers to the alkyl, alkenyl, aryl, or other groups. They can undergo different chemical reactions, such as acid-base reactions, esterification, and oxidation. These are essential components of living organisms, playing important roles in metabolic processes, signaling, and as pharmaceuticals.

Chapter 22, Problem 55P

Interpretation Introduction