Patent ID: 8367704

Claim:
A process for preparing 2-methyl-2′-phenylpropionic acid derivatives of the following Formula 1, comprising the step of reacting a compound of the following Formula 2 with a compound of the following Formula 3: wherein, A is oxygen or nitrogen; when A is oxygen, R 1 is hydrogen or C 1 -C 6 linear or branched alkyl, and R 2 is hydrogen or —CH 2 CH 2 OR 2 ; when A is nitrogen, R 1 together with A forms a 5 to 7-membered ring unsubstituted or substituted with C 1 -C 6 linear or branched alkyl and R 2 is —CH 2 CH 2 OR 2 ′; R 2 ′ is hydrogen, C 1 -C 6 linear or branched alkyl, C 3 -C 6 cyclic alkyl, or C 2 -C 6 alkenyl; and X is a leaving group.