New Synthesis Method to Obtain a Methacrylic Monomer With a Pyrylium Group

Abstract

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.

Bottlebrush Polymers for Articular Joint Lubrication: Influence of Anchoring Group Chemistry on Lubrication Properties

“…Furthermore, the characteristic band for the aromatic ring occurs at c.a. 1600 cm –1 (CC stretching in aromatic rings) . For P­(GMA 49 - co -MMA 46 ) copolymer, the line characteristic for the epoxide ring is visible at c.a.…”

“…1600 cm –1 (C=C stretching in aromatic rings). 46 For P(GMA 49 - co -MMA 46 ) copolymer, the line characteristic for the epoxide ring is visible at c.a. 910 cm –1 .…”

Synthesis of a polymeric sensor containing an occluded pyrylium salt and its application in the colorimetric detection of trimethylamine vapors

“…In the final synthesis, the temperature (68 °C) and reaction time (12 h) were modified to obtain a higher reaction yield (32%) for SP. In addition, SP's intermediate compound (4‐formylphenyl methacrylate) was obtained by a route of synthesis different from that reported by García‐Acosta et al ., also resulting in a higher yield (89.2%) …”