Sulfamic Acid as A Cost-Effective Catalyst for Synthesis of α-Acyloxyacrylate Esters as Candidate Monomers for Biobased Polymers by Acylation of Pyruvate Esters

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Sulfamic acid was used as an efficient catalyst and green alternative for metal-containing acidic material to promote the acylation of pyruvate esters to produce α-acyloxyacrylate esters, which were candidate monomers for biobased polymers. Polymers from these monomers were useful materials for bio-based plastics, which showed high heat resistance and transparency. A series of α-acyloxyacrylate esters were converted from pyruvate esters by using sulfamic acid as a catalyst and good yields were obtained. The reaction in the presence of the sulfamic acid catalyst was carried out in the liquid phase and showed greater productivity than synthesis with a conventional liquid inorganic acid.