Synthesis reaction: turn 4-octyne into butanal

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SUMMARY

The discussion centers on the synthesis reaction of converting 4-octyne into butanal using specific reagents and catalysts. The process begins with the addition of H2 and a Lindlar catalyst to produce the necessary reactant. Following this, ozonolysis is employed, which involves the use of ozone (O3) to cleave the double bond. The addition of zinc (Zn) and acetic acid (CH3CO2H) is crucial for reducing the ozonide intermediate to yield butanal.

PREREQUISITES
  • Understanding of hydrogenation with Lindlar catalyst
  • Knowledge of ozonolysis reactions
  • Familiarity with the role of zinc in organic synthesis
  • Basic concepts of acetic acid as a reducing agent
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  • Study the mechanism of ozonolysis reactions in organic chemistry
  • Research the use of Lindlar catalysts in hydrogenation processes
  • Learn about the reduction of ozonides using zinc and acetic acid
  • Explore the synthesis of butanal from various alkynes
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Chemistry students, organic chemists, and researchers interested in synthetic pathways for converting alkynes to aldehydes.

Lo.Lee.Ta.
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aldehyderxn.jpg


I know that first we have to add H2 and a Lindlar catalyst in order to produce what is the reactant.
I thought adding O3 would be an ozonolysis reaction.
An ozonolysis reaction should yield this:

ozonolysisreaction.png


I don't know why they added the Zn and CH3CO2H, though.

What does this even do in the reaction?

Thanks for your help! :)
 
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What is the structure of the first-formed product of the double bond with ozone and what is the mechanism of the reaction?
 

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