| abstract |
The present invention concerns a method for preparing a compound of formula (I) HR 1 R 2 C-CF 2 -(C=0)-Y from a compound of formula (II) R 1 C 2 C=CX-(C=O)-Y or formula (III) HR 1 R 2 C-CX 1 X 2 -(C=O)-Y brought into contact with hydrofluoric acid; R 1 and R 2 being selected independently from H, F, Cl, Br, I, C 1 -C 20 -alkyl, C 6 -C 20 -aryl and C 2 -C 20 -alkenyl, C 3 -C 20 -cycloalkenyl and C 3 -C 20 -cycloalkyl; X 1 and X 2 being selected independently from F, Cl, Br and I on condition that X 1 and X 2 are not simultaneously F; Y being selected from the group consisting of H, C 1 -C 20 -alkyl, C 1 -C 20 -haloalkyl, C 6 -C 20 -aryl, -OH, -OR, -NH 2 , -NHR, -NR 2 , -SR, C 3 -C 20 -cycloalkyl, C 3 -C 20 -cycloalkenyl and C 2 -C 20 -alkenyl; R being selected independently from the group consisting of C 1 -C 20 -alkyl, C 6 -C 20 -aryl and C 2 -C 20 -alkenyl, C 3 -C 20 - cycloalkenyl and C 3 -C 20 -cycloalkyl. |