| 摘要 |
PURPOSE:To obtain the high-purity titled compound industrially stably and in high yield without forming polymers, by using a cyclic alcohol previously heat-treated with water and an organic sulfonic acid and esterifying the cyclic alcohol with an unsaturated carboxylic acid. CONSTITUTION:A cyclic alcohol is previously heat-treated in the presence of both water and an organic sulfonic acid in an inert atmosphere such as preferably N2, CO2, etc., and esterified with an unsaturated carboxylic acid in the presence of a polymerization inhibitor such as phenothiazine, etc., at 70-150 deg.C preferably under reduced pressure of 50-500Torr in order to distill away formed water to give the aimed compound. The reaction solution is well separated into an oil layer and a water layer when neutralized with an alkali aqueous solution and there is no troubles in concentration and purification processes afterward. The titled compound is useful as a monomer, etc., for polymers suitable for optical uses such as lens, prism, molding material, adhesive, coating compound and covering material to improve physical properties. |
