Chapter 10: Conjugation in Alkadienes and Allylic Systems

Preparation of Conjugated Dienes

• Dienes can be prepared by elimination reactions (review) of unsaturated alcohols and alkyl halides.
• The outcome of eliminations typically favours the more stable product,
• Since conjugated dienes are more stable than isolated dienes, the formation of the conjugated diene is usually favoured over the isolated diene unless the structure prevents the formation of the conjugated system.

© Dr. Ian Hunt, Department of Chemistry