Question

Propose a mechanism for the following reaction:

Short answer

A Claisen rearrangement is a [3,3] sigmatropic rearrangement of an allyl vinyl ether.

It takes place under thermal conditions, it contains the rearrangement of six electrons and makes a six-membered transition state

Step-by-step solution

Step 1:Claisen rearrangement 

A Claisen rearrangement is a [3,3] sigmatropic rearrangement of an allyl vinyl ether.

It takes place under thermal conditions, it contains the rearrangement of six electrons and makes a six-membered transition state

Step 2:Cope rearrangement

A Cope rearrangement is a [3,3] sigmatropic rearrangement of a 1,5-diene.

After tautomerization, we will get the final product.