Cyclic enamine ketone derivatives (I) are new. Cyclic enamine ketone derivatives of formula (I) are new. A : 2-pyridyl, 4-pyridyl, 6-X 1>;-3-pyridyl, 6-X 2>;-3-pyridazinyl, 3-pyrazinyl or 2-X 2>;-5-thiazolyl; X 1>; : H, F, Cl, Br, Me, CF 3or OCF 3; X 2>; : H, Cl or Me; B' : O, S or CH 2; R 1>; : haloalkyl, haloalkenyl, halocycloalkyl or halocycloalkylalkyl; R 2>; : H or halo; R 3>; : H or alkyl. [Image] ACTIVITY : Insecticide. In a test against Myzus persicae, 4-(N-(6-chloro-3-pyridylmethyl)-N-(2-fluoroethyl)amino)-2(5H)-furanone gave 100% kill after 6 days at a concentration of 0.8 ppm. MECHANISM OF ACTION : None given.