{"knowledge_schema": {"broad_category": "Chemistry \u2192 Organic Synthesis \u2192 Reaction Optimization", "refinement": "This problem deals with the synthesis of a specific compound and the challenges associated with the reaction conditions that lead to undesired outcomes in NMR analysis.", "specific_scope": "The focus is on resolving the issue of multiple boron signals in the NMR spectrum during the synthesis of (3-bromo-5-fluorophenyl)boronic acid using n-BuLi and trimethyl borate in THF.", "goal": "Identify a method to achieve a cleaner NMR spectrum with distinct boron signals, indicating successful synthesis."}, "summary": "In this organic synthesis problem, the goal is to synthesize (3-bromo-5-fluorophenyl)boronic acid, but the reaction yields multiple boron signals in the NMR spectrum, indicating potential issues with the reaction conditions. The suggested solution is to change the solvent from THF to diethyl ether, which can help in achieving a cleaner NMR spectrum by potentially stabilizing the desired boronic acid product and minimizing side reactions or complexation that leads to multiple signals."}