Diethyl ketal of 3,3-dibromo-3-fluoropropanal was prepared by UV-initiated
condensation of fluorotribromomethane with ethyl vinyl ether, following Tar
rant-Stump procedure. Direct oxidation of this acetal to ethyl 3,3-dibromo-
3-fluoropropanoate was carried out using Care's acid. On treating this este
r with triethylamine, dehydrobromination took place, yielding ethyl 3-bromo
-3-fluoroacrylate. Finally, a selective reduction of the bromine atom by tr
ibutyltin hydride led to ethyl 3-fluoroacrylate. (C) 2000 Elsevier Science
S.A. All rights reserved.