Reaction of thiols with vinyl ethers

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SUMMARY

Thiols react with vinyl ethers following anti-Markovnikov's rule, resulting in the formation of anti-Markovnikov products through a free radical mechanism. This reaction occurs under catalyst-free conditions, as detailed in Jerry March's textbook. The interaction between the oxygen in the vinyl ether and the hydrogen in the thiol activates the double bond, allowing the beta carbon to attract sulfur, leading to the breaking of the sulfur-hydrogen bond. The alpha carbon then abstracts a proton from oxygen, completing the reaction.

PREREQUISITES
  • Understanding of anti-Markovnikov's rule
  • Familiarity with free radical mechanisms
  • Knowledge of thiol and vinyl ether chemistry
  • Basic principles of organic reaction mechanisms
NEXT STEPS
  • Study the free radical mechanism in organic chemistry
  • Research the peroxide effect and its implications in reactions
  • Explore the role of UV light in initiating free radical reactions
  • Investigate catalyst-free organic reactions and their conditions
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Chemistry students, organic chemists, and researchers interested in reaction mechanisms involving thiols and vinyl ethers.

AdityaDev
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Homework Statement


Find the product:
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2. Relevant concepts

Thiols react with vinyl ethers according to anti-markovnikov's rule

The Attempt at a Solution



After reading Jerry March's book, i came to know that it follows free radical mechanism and that is why it gives anti markovnikov's product. Just like the peroxide effect. But its given that the reaction takes place in catalyst free conditions. What is the free radical initiator here?
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The interaction between oxygen in vinyl ether and hydrogen in thiol activates the double bond. The beta carbon has a partial positive charge and attracts sulfur. Then the bond between sulfur and hydrogen is broken. The alpha carbon then abstracts the proton from oxygen, giving the anti-Markovnikov product.
 
But it follows free radical mechanism.
 
AdityaDev said:
But it follows free radical mechanism.
Are you sure?
There must be given something else in your book?
Initiation of free radical mechanism requires energy in form of UV rays or something else but here nothing more is given.
 
Nothing else is given. Surprisingly, the reaction takes place in catalyst and solvent free conditions.
 

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