Protecting Carbonyls: Acetals/Ketals (Why They’re Base-Stable): Mechanism + Exam Traps

Acetals/ketals protect aldehydes/ketones so they don’t react during nucleophilic additions or reductions.

  • Reaction: Protecting Carbonyls: Acetals/Ketals (Why They’re Base-Stable)
  • What it does: Acetals/ketals protect aldehydes/ketones so they don’t react during nucleophilic additions or reductions.
  • Typical reagents: HOCH2CH2OH, H+ (cat.)
  • Key intermediate: Tetrahedral intermediate
  • Driving force: Formation of more stable bonds / products
  • Exam type: Choose reagents
  • Exam type: Plan order of operations
  • Exam type: Chemoselectivity

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