What is a major isolated product arising from Cope (Claisen) rearrangement for the following compound?
C) This compound does not undergo such rearrangement.

Question

What is a major isolated product arising from Cope (Claisen) rearrangement for the following compound? 
C) This compound does not undergo such rearrangement.

Quizplus · Accepted Answer

The compound undergoes Cope (Claisen) rearrangement with the first bond break occurring between the carbon bearing the chlorine and the adjacent carbon. This leads to the formation of a four-membered cyclic transition state. The result is a reorganization of the carbon-carbon double bond and the formation of a six-membered carbocycle. The major isolated product arising from this reaction is shown in choice B.

What Is a Major Isolated Product Arising from Cope (Claisen)