Reference

Process for the preparation of fluorinated derivatives

Process for the preparation of fluorinated derivatives. Forat, Gerard; Gilbert, Laurent; Langlois, Bernard (Rhone-Poulenc Chimie, Fr.). Eur. Pat. Appl. EP 467742 A1 22 Jan 1992, 15 pp. DESIGNATED STATES: R: AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LI, LU, NL, SE. (European Patent Organization). CODEN: EPXXDW. CLASS: ICM: C07C205-12. ICS: C07C201-12; C07B039-00. APPLICATION: EP 91-401866 5 Jul 1991. PRIORITY: FR 90-9023 16 Jul 1990; FR 90-9025 16 Jul 1990. DOCUMENT TYPE: Patent CA Section: 25 (Benzene, Its Derivatives, and Condensed Benzenoid Compounds) Organo fluoro compds. were prepd. by fluoride exchange under the action of ultrasound and in the presence of an solvent compd. and an aprotic dipolar solvent. E.g., 2,4-dichloronitrobenzene (7.75 g), KF (5.8 g), Me4NCl (0.43 g), and Me2SO (11. 13400-13-0 and 2106-50-5 are just another two chemicals used in this study.6 g) were treated with ultrasound at 150° for 30 min to give 99% conversion, 80% 2,4-difluoronitrobenzene, and 15% chlorofluoronitrobenzene. .