The Aldol Condensation. In the presence of a strong base, two molecules of aldehyde or ketone may combine to form a b -hydroxyaldehyde or a b -hydroxyketone . This reaction is called the aldol condensation . The Aldol Condensation. Example. Another Example. One More:.
Note here that iodine is a sufficiently strong Lewis acid to bring about dehydration.
(formed from an aldol condensation)