Each diastereomer, if treated with sodium ethoxide (NaOCH2CH3), undergoes an E2 reaction. One of the diastereomers undergoes an E2 to make a single compound. The other diastereomers undergoes E2 eliminations leading to two different compounds. Draw the mechanisms for all three of these E2 reactions, being sure to use conformational structures for the substrate in each reaction. Which of the two diastereomers will undergo an E2 reaction at the faster rate? Why? (In organic chemistry it is often said one picture is worth a thousand words. Be sure to include a picture that supports whatever argument you are making.

Organic Chemistry
8th Edition
ISBN:9781305580350
Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Chapter16: Aldehydes And Ketones
Section: Chapter Questions
Problem 16.78P
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Consider diastereomers X and Y shown below.

Cl

diastereomer X

Cl

HO

H

OH

H

Each diastereomer, if treated with sodium ethoxide (NaOCH2CH3), undergoes an E2 reaction.

  1. One of the diastereomers undergoes an E2 to make a single compound. The other diastereomers undergoes E2 eliminations leading to two different compounds. Draw the mechanisms for all three of these E2 reactions, being sure to use conformational structures for the substrate in each reaction.

  2. Which of the two diastereomers will undergo an E2 reaction at the faster rate? Why? (In organic chemistry it is often said one picture is worth a thousand words. Be sure to include a picture that supports whatever argument you are making.

IV
Compare and Contrast
Consider diastereomers X and Y shown below.
'CI
"CI
diastereomer X
diastereomer Y
Each diastereomer, if treated with sodium ethoxide (NaOCH2CH:), undergoes an E2 reaction.
a. One of the diastereomers undergoes an E2 to make a single compound. The other
diastereomers undergoes E2 eliminations leading to two different compounds. Draw the
mechanisms for all three of these E2 reactions, being sure to use conformational
structures for the substrate in each reaction.
b. Which of the two diastereomers will undergo an E2 reaction at the faster rate? Why? (In
organic chemistry it is often said one picture is worth a thousand words. Be sure to
include a picture that supports whatever argument you are making.
Transcribed Image Text:IV Compare and Contrast Consider diastereomers X and Y shown below. 'CI "CI diastereomer X diastereomer Y Each diastereomer, if treated with sodium ethoxide (NaOCH2CH:), undergoes an E2 reaction. a. One of the diastereomers undergoes an E2 to make a single compound. The other diastereomers undergoes E2 eliminations leading to two different compounds. Draw the mechanisms for all three of these E2 reactions, being sure to use conformational structures for the substrate in each reaction. b. Which of the two diastereomers will undergo an E2 reaction at the faster rate? Why? (In organic chemistry it is often said one picture is worth a thousand words. Be sure to include a picture that supports whatever argument you are making.
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