Patent ID: 7067691

Claim:
A process for producing an α-substituted acrylic acid ester represented by the formula [1], wherein each of R 1 and R 2 is independently a hydrogen atom, methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, sec-butyl group, tert-butyl group, fluoromethyl group, difluoromethyl group, trifluoromethyl group, or perfluoroethyl group, the process comprising reacting an α-substituted acrylic acid anhydride represented by the formula [7], wherein R 2 is defined as above, with 1,1-bis(trifluoromethyl)-1,3-diol represented by the formula [2] wherein R 1 is defined as above, wherein the 1,1-bis(trifluoromethyl)-1,3-diol is obtained by a process comprising the steps of: (a) reacting a fluorine-containing unsaturated alcohol represented by the formula [8]. wherein R 1 is defined as in the formula [1], with concentrated sulfuric acid, thereby producing a sulfuric ester; and (b) bringing the sulfuric ester into contact with water, thereby hydrolyzing the sulfuric ester into the 1,1-bis(trifluoromethyl)-1,3-diol.