Epoxide Ring Opening by Strong Nucleophiles

Epoxide ring opening by strong nucleophiles happens because epoxides have a highly strained three-membered ring. This strain makes them ready for nucleophilic substitution in either acid or base. In the base-catalyzed pathway, a strong nucleophile or base attacks the ring and opens it.

Common nuc...

Epoxides, due to their highly strained structures, readily undergo ring-opening reactions that are either acid-catalyzed or base-catalyzed.

Compared to acid-catalyzed reactions, base-catalyzed ring-openings require a strong nucleophile or a strong base, such as an alkoxide ion or a hydroxide ion.

For example, sodium ethoxide cataly...