Yagupol’skii, L. M.; Burmakov, A. I.; Alekseeva, L. A.; Kunshenko, B. V. published an article in 1973, the title of the article was Fluorination of aromatic carboxylic acids by sulfur tetrafluoride. VIII. Fluorination of spatially hindered aromatic carboxylic acids.HPLC of Formula: 41819-13-0 And the article contains the following content:
Fluorination of benzenetricarboxylic acid (I; R = R1 = R2 = CO2H) by SF4 gave 76% fluoride (I; R = R2 = CF3, R1 = COF) which was hydrolyzed to yield 73% acid (I; R = R2 = CF3, R1 = CO2H). The latter was decarboxylated by heat to give 67% (I; R = R2 = CF3, R1 = H). Analogous fluorination of benzenetetracarboxylic acid (II) gave 84% benzodifuran (III; R = Br). Naphthopyran (IV) was obtained in 63% yield from naphthalic acid. Treatment of mellitic acid by SF4 gave 65% III (R = CF3) and 55% benzotrifuran (V) was obtained by fluorination of the corresponding perchlorobenzotrifuran. The experimental process involved the reaction of 3,6-Dibromobenzene-1,2,4,5-tetracarboxylic acid(cas: 41819-13-0).HPLC of Formula: 41819-13-0
The Article related to fluorination acid sulfur tetrafluoride, benzotrifuran perfluoro, benzodifuran perfluoro, Heterocyclic Compounds (More Than One Hetero Atom): Fused-Ring Systems With Two Or More Hetero Atoms, No More Than One Hetero Atom Per Ring and other aspects.HPLC of Formula: 41819-13-0
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary