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JEE Main levelSingle correct optionDifficulty 2 of 3ro255

The compound shown is treated with m-CPBA. Which structure is the major product?

  1. AStructure A
  2. BStructure B
  3. CStructure C
  4. DStructure D

Answer: A

The compound is 2-methylcyclohexanone. The more substituted (secondary) alpha carbon has the higher migratory aptitude than the , so oxygen is inserted next to the carbon, giving 7-methyloxepan-2-one. The regioisomer with oxygen on the other side results from migration.
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