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What would be the best sequence of reactions/reagents to use for this transformation (the one that will give the best yield of the shown product)? reagents

What would be the best sequence of reactions/reagents to use for this transformation (the one that will give the best yield of the shown product)? reagents

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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**Title: Choosing the Best Sequence of Reactions for Alkyne to Alkene Transformation** **Objective:** Determine the best sequence of reactions/reagents to convert an alkyne compound into a more substituted alkene with the best yield, as shown in the diagram. **Diagram Explanation:** - **Reactant:** An alkyne with two substituents on one end. - **Product:** A trans-alkene with additional carbon chains. **Steps to Determine Reaction Sequence:** **Question:** What would be the best sequence of reactions/reagents to use for this transformation (the one that will give the best yield of the shown product)? **Reagents/Steps Options:** 1. **1st step:** Select from the dropdown menu: - H₂, Pd/C - NaNH₂, then H₂O - 1) NaNH₂ 2) CH₃I - H₂, Lindlar catalyst - 1) NaNH₂ 2) CH₃CH₂I - No second step needed - HBr 2. **2nd step:** Choose if needed based on the first. **Approach:** - Evaluate the first step's reagents to match the desired transformation of the alkyne to an alkene with specific substituents. - Confirm if the second step is required to achieve the correct product. The goal is to assess each reagent option for its ability to efficiently form the intended alkene structure with the right stereochemistry and regiochemistry for optimal yield.
Transcribed Image Text:**Title: Choosing the Best Sequence of Reactions for Alkyne to Alkene Transformation** **Objective:** Determine the best sequence of reactions/reagents to convert an alkyne compound into a more substituted alkene with the best yield, as shown in the diagram. **Diagram Explanation:** - **Reactant:** An alkyne with two substituents on one end. - **Product:** A trans-alkene with additional carbon chains. **Steps to Determine Reaction Sequence:** **Question:** What would be the best sequence of reactions/reagents to use for this transformation (the one that will give the best yield of the shown product)? **Reagents/Steps Options:** 1. **1st step:** Select from the dropdown menu: - H₂, Pd/C - NaNH₂, then H₂O - 1) NaNH₂ 2) CH₃I - H₂, Lindlar catalyst - 1) NaNH₂ 2) CH₃CH₂I - No second step needed - HBr 2. **2nd step:** Choose if needed based on the first. **Approach:** - Evaluate the first step's reagents to match the desired transformation of the alkyne to an alkene with specific substituents. - Confirm if the second step is required to achieve the correct product. The goal is to assess each reagent option for its ability to efficiently form the intended alkene structure with the right stereochemistry and regiochemistry for optimal yield.
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