NITROMETHYLENE DERIVATIVE, PRODUCTION THEREOF AND INSECTICIDE

摘要

NEW MATERIAL:A compound expressed by formula I (R is H or alkyl; X is haloalkyl, haloalkoxy, nitro, acyl, etc.; l is 1, 2 or 3; m is 2, 3, or 4; n is 0 or 1). EXAMPLE:1-(2-Cyano-5-pyridylmethyl)-2-(nitromethylene)tetrahydropyrimi dine. USE:An insecticide. PREPARATION:A compound expressed by formula II is reacted with a compound expressed by formula III (R' is lower alkyl or benzyl or two R's together with S form a ring) in the presence of a suitable diluent at 0-100 deg.C to afford the aimed compound expressed by formula I.