11. Certain glucuronides are electrophilic and may function in toxication processes. 12. An electrophilic carbon, activated by a Lewis acid, is required. 13. For example, they undergo Diels-Alder reactions with electrophilic alkynes. 14. This diene reacts rapidly with electrophilic alkenes, such as maleic anhydride. 15. This reaction proceeds through electrophilic acylium ion attack with a spiro intermediate. 16. The reaction is an example of an electrophilic aromatic substitution. 17. The chiral ketene enolate nucleophile attacks electrophilic carbon of the imine group. 18. An electrophilic substitution reaction on benzene does not always result in monosubstitution. 19. Guaiol yields a deep purple color when treated with electrophilic bromine reagents. 20. An alternative to aromatic substitution is electrophilic aliphatic substitution.
