The major product formed in the following transformation is

Concept:

• The Nazarov cyclization reaction is a chemical reaction used in organic chemistry for the synthesis of various cyclopentenone derivatives.
• The Nazarov cyclization involves the activation of a divinyl ketone using a stoichiometric amount of lewis acid or protic acid as a promoter. The key step of the reaction mechanism involves a cationic 4π-electrocyclic ring closure which forms the cyclopentenone product.
• An example is shown below:

Explanation:​

• The reaction pathway is shown below:

• From the above reaction, we see that the reaction proceeds through the Nazarov cyclization reaction, where FeCl₃ acts as a lewis acid in this reaction to form a cationic intermediate.
• In the next step, the cationic intermediate undergoes a 4π-electrocyclic ring closure in a conrotatory manner to give the \(\beta \)-silyl carbocation.
• The silyl carbocation undergoes rearrangement to give the final product. 

​Conclusion:

The major product formed in the following transformation is