Agreeable interactions: The first example of 1,3-dipolar cycloadditions between nitrileoxides and o-hydroxystyrenes, mediated by a cinchona-alkaloid-based amine-urea catalyst, is reported. The reaction involves the dual activation of both the LUMO of the nitrileoxide and HOMO of the o-hydroxystyrene, as confirmed by computational studies. The activation is facilitated by hydrogen-bonding interactions