Abstract
Abstract The chloroaluminate ionic liquid composed of AlCl 3 and 1-butyl-3-methylimidazolium chloride ([bmim]Cl) was used as the solvent and catalyst to synthesize α-hydroxy esters from alkene and glyoxylate via the glyoxylate-ene reaction. Under the reaction conditions of 15°C, 4 h, and AlCl 3 /[bmim]Cl molar ratio of 2, the ethyl α-hydroxy-4-phenyl-4-pentenoate with a high yield of 95.2% is obtained in the reaction of reaction of α-methyl styrene and ethyl glyoxylate. Other α-hydroxy esters can also be obtained in high yields through the glyoxylate-ene reaction. Moreover, the chloroaluminate ionic liquid can be reused several times.
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