Below are typical problems from Chemsheets (e.g., sheets COS12, COS13, and COS14). Let’s solve them step-by-step.
When you attempt a Chemsheets problem, follow this decision tree: Chemsheets Organic Synthesis Problems Answers
Work backward from the target molecule. Example: Target = pentan-2-ol. Backward: pentan-2-ol comes from pentan-2-one (reduction with NaBH4 ). Pentan-2-one comes from butanenitrile + CH3MgBr (Grignard). Butanenitrile from 1-bromopropane + KCN . Start from propane. Below are typical problems from Chemsheets (e