| 摘要 |
<p>PURPOSE:To obtain a new cyanoketone derivative useful as an active ingredient of a herbicide, having high herbicidal action on gramineous weeds even in a small amount of chemical and extremely safe for the objective crop even in the case of administration in a large amount of chemical. CONSTITUTION:This compound of formula I (A1 is substitutive aromatic group or substitutive heterocyclic group; X1 to X4 are 0 or S; B1 to B3 are H or alkyl; Y1 to Y4 are H, halogen or alkyl; A2 and A3 are H, substitutive alkyl, alkenyl, alkoxy, alkylthio, alkoxycarbonyl, CN, substitutive aromatic group, substitutive heterocyclic group or further mutually bound to form a saturated or an unsaturated ring), e.g. 1-cyano-1-(piperidinocarbonyl)-3-[4-(2-chloro-4-trifluorophenoxy)- phenoxy]-2-butanone. The compound is obtained by reacting a compound of formula II (M is H or alkali metal) with a compound of formula III (Z is halogen).</p> |
