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CBSE Class 12-science Answered

Could you explain me the following reactions :
1. Perkin Reaction
2. Michael Addition?
Asked by Sweta S | 09 Apr, 2015, 11:24: PM
answered-by-expert Expert Answer
Dear swetaparna.sarangi@gmail.com

Thanks for asking us a question in Ask the Expert section of TopperLearning.com.

In case of multiple questions within a query, please post each question individually and let us know where you are getting stuck so that we would be able to explain things better.

Solution for your first query,
 

Perkin reaction

 Aromatic aldehydes on reaction with aliphatic acid anhydrides in presence of sodium salt of the same acid as base, to form condensation products whch upon hydrolysis give ⍺, β-unsaturated acids. This reaction is called perkin condensation. For example, when benzaldehyde is heated with acetic anhydride in presence of sodium acetate, the product thus formed on hydrolysis gives cinnamic acid.

 

Mechanism:

 
 
Regards

Topperlearning Team.
Answered by Prachi Sawant | 10 Apr, 2015, 07:31: PM

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