Methacrylic monomers with pyrylium salt derivatives are widely used to detect nucleophilic species.A new synthesis method has been used to obtain a pyrylium salt that is trisubstituted with phenyl groups at positions 2,4, and 6.The phenyl group of the 4-position has a metacrylate group in the para-position.The new synthesis method implies the esterification of 4-hydroxybenzaldehyde, using methacrylic anhydride.The formed compound react with acetophenone to form the pyrylium derivative.The yields of both reactions are greater than those previously reported in the literature.