the addition of a compound with a double bond having an allylic hydrogen (the 'ene') to a compound with a multiple bond (the 'enophile') with transfer of the allylic hydrogen and a concomitant reorganization of the bonding, liitumisreaktsioon, mis toimub allüülvesinikku sisaldava ühendi lisamisel kordset sidet sisaldavale ühendile
