{"knowledge_schema": {"broad_category": "Chemistry \u2192 Organic Chemistry \u2192 Reaction Mechanisms", "refinement": "This problem involves the reaction of epoxides with organocuprates, focusing on stereochemistry and regioselectivity.", "specific_scope": "The specific context is the reaction of a disubstituted epoxide with Me2CuLi, where the stereochemistry of the product is influenced by the structure of the starting material and the mechanism of nucleophilic attack.", "goal": "Identify the correct product structure resulting from the reaction, taking into account the stereochemical outcomes of the nucleophilic attack on the epoxide."}, "summary": "This problem examines the reaction of a specific epoxide with an organocuprate reagent, highlighting the principles of regioselectivity and stereochemistry in organic reactions. The epoxide in question is disubstituted, and the nucleophile (Me2CuLi) will attack the less hindered carbon, leading to inversion of configuration at that carbon. The goal is to determine the correct product from the given options, considering the stereochemical implications of the reaction."}