Esters Zirconium acetylacetonate

In contrast, allyl methacrylate is produced by the esterification of methacrylic acid and allyl alcohol (13), or by the transesterification of allyl alcohol with an ester of methacrylic acid, preferably with methyl methacrylate. The latter reaction is catalyzed with zirconium acetylacetonate (14). The esterification reactions are shown in Figure... 

Polydioxanone is a colorless, crystaUine, biodegradable synthetic polymer. Chemically, it is a polymer of multiple repeating ether-ester units. It is obtained by ringopening polymerization of the monomer p-dioxanone. The process requires heat and an organometallic catalyst as zirconium acetylacetone or zinc L-lactate. Polydioxanone is characterized by a glass transition temperature in the range of 10 and 0°C and a crystallinity of about 55%. It is generaUy extruded into fibers however, to avoid its... 

Enols and alkoxides give chelates with elimination of alcohol. For example, in the reaction of the enol form of acetylacetone [123-54-6] all four alkoxide groups attached to zirconium can be replaced, but only two of the four attached to titanium (Fig. 3). Acetoacetic esters react similarly. 

Thiol acids, esters, lactones N-Phenylselenophthalimide, 245 Zirconium(IV) acetylacetonate, 351... 

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