Abstract A new general catalytic olefination reaction (COR) of aromatic and heteroaromatic aldehydes and ketones was applied to synthesise 2-chloro-2-fluorostyrenes. The two-stage procedure includes the transformation of carbonyl compounds into hydrazones followed by treatment with CFCl 3 mediated by copper catalysis. Trichlorofluoromethane was used as a chlorofluoromethylene transfer reagent. The reaction proceeds stereoselectively and the ...
![Benzaldehyde,4-chloro-, 2-[(4-chlorophenyl)methylene]hydrazone Structure](https://image.chemsrc.com/caspic/138/3510-48-3.png)