Ki. Pashkevich et al., REACTIONS OF REGIOISOMERIC FLUOROALKYL-CONTAINING BETA-AMINOVINYL KETONES WITH HYDRAZINES, Russian chemical bulletin, 45(12), 1996, pp. 2868-2870
Fluoroalkyl beta-alkyl-beta-aminovinyl ketones react with hydrazine hy
drate to give the respective pyrazoles, and with phenylhydrazine they
form a mixture of pyrazoles and 5-hydroxy-Delta(2)-pyrazolines. Alkyl(
aryl) beta-fluoroalkyl-beta-aminovinylketones do not react with the hy
drazines mentioned above. With 2,4-dinitrophenylhydrazine, both types
of fluoroalkyl-containing beta-aminovinyl ketones give only hydrazones
of the corresponding methyl alkyl(aryl) ketones.