The syntheses of new terephthalic acids (8a-d) containing various polyfluoroalkyl groups ( ; CF 3 , ; HCF 2 , ; H(CF 2 ) 3 and ; H(CF 2 ) 5 ) are described in this paper. These compounds were obtained by aromatization (bromination and dehydro-bromination) of Diels-Alder adducts ( and ) of polyfluoro- 2-alkynoic acids ( ) with 2-methyl-1, 3-butadiene, followed by oxidation with KMnO 4 . ... M. Kuwabara, K. Fukunishi, M. Nomura, H. Yamanaka, J. Flourine Chem., in press.
