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Generalized structure of the aldol moiety: When R3 is -H, it is a β-hydroxy aldehyde, otherwise it is a β-hydroxy ketone.

An aldol or aldol adduct (from "Aldehyde alcohol") is a beta-hydroxy ketone or aldehyde, and is the product of aldol addition (as opposed to aldol condensation, which produces an α,β-unsaturated carbonyl moiety).

Typically, "aldol" refers to 3-hydroxybutanal.[1]


  1. ^ McMurry, John (2008). Organic Chemistry, 7th Ed. Thomson Brooks/Cole. pp. 877–80. ISBN 978-0-495-11258-7. 

Category:Aldehydes Category:Alcohols