Draw all steroisomers formed in the reaction below. Draw all steroisomers formed in the reaction...

Question:

Draw all steroisomers formed in the reaction below.

Wittig Reaction

Wittig reaction that forms alkenes from aldehyde or ketone using ylides. This reaction is a condensation reaction. Thus, it is a good synthetic reaction producing larger compounds. Also, the double bond only forms on the carbonyl carbon replacing the carbon-oxygen double bond does alkene formation is quite specific. The only side products are the stereoisomers of the alkene since both isomers can be formed.

Answer and Explanation:

All products are shown below:

This reaction is called the Wittig reaction. It forms alkenes from carbonyl compounds(ketone or aldehyde) with ylides. Ylides are organophosphorus reagents that can act as a nucleophile. This reaction is a three-step reaction where the ylide attacks the carbonyl carbon followed by the formation of a 4-membered ring and lastly the formation of the alkene. Both Z and E alkene isomers can be formed from this reaction.


Learn more about this topic:

The Wittig Reaction & Alkene Synthesis: Definition & Examples
The Wittig Reaction & Alkene Synthesis: Definition & Examples

from Chemistry 304: Organic Chemistry II

Chapter 2 / Lesson 14
548

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