Chapter 15: Synthesis

Synthesis is framed as the reverse of product prediction—figuring out what reagents and starting materials are needed to arrive at a target molecule. The chapter begins with one-step syntheses, emphasizing the importance of frequent practice and recall using blank reaction maps to master individual reactions. It then advances to multi-step syntheses, where students are encouraged to look for logical reaction pairings, like forming alkenes and then adding functionality across the double bond. This leads into retrosynthetic analysis, a cornerstone technique in which students work backward from a product to identify strategic intermediates. By recognizing functional groups and reaction patterns (like forming dibromides from alkenes or alkenes from eliminations), students can build a reaction roadmap. Klein uses a chess analogy to highlight the importance of forward planning and problem-solving, encouraging students to avoid memorization and instead develop critical thinking. The chapter closes with advice to create and exchange synthesis problems as a form of active learning, reinforcing concepts while simulating real-world organic challenges. Mastery of this chapter equips students to tackle complex synthesis on exams and in lab settings with strategic confidence.