Identify the major product of the following reaction sequence:

Step-by-step solution

The given reaction sequence involves two main steps: 1. Epoxidation: The reaction of methylenecyclohexane with peracetic acid ( CH₃CO₃H ) results in the epoxidation of the exocyclic double bond. This forms an epoxide intermediate, 1-oxaspiro[2.5]octane. 2. Nucleophilic Ring Opening: The Grignard reagent, CH₃MgBr , provides a methyl nucleophile ( CH₃^- ). Under the basic conditions of a Grignard reaction, the nucleophile attacks the less sterically hindered carbon atom of the epoxide ring via an S_N2 mechanism. The