In vinylogous addition reactions, a 1,4-dien-3-one reacts with a 1,1-dicyanoalkene to add nucleophiles or electrophiles at specific positions. The phosphine catalyst plays a role in activating the dienone and promoting the addition reaction. Depending on the choice of reagents and reaction conditions, different products can be obtained.
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C28H19(2)H3N2O
