| 摘要 |
<p>NEW MATERIAL:The compound of formula I [X is H or halogen; Y is halogen; A and B are lower alkylene or lower alkylidene; W is O or S; Z is lower alkoxy, lower alkylamino, lower dialkylamino, morpholyl or OM (M is alkali metal); Q is heterocyclic residue of formula II, formula III formula IV, etc.; R1 is halogen or lower alkyl; R2 is H or lower alkyl]. EXAMPLE:3-chloro-2-[ 4-chloro-2-fluoro-5-( 1-methoxycarbonylethoxymethyl )phe nyl]-4,5,6,7-tetrahydro-2H-indazole. USE:Useful as a herbicide. It has broad selectivity between crops and weeds, exhibits remarkable effect at a low rate of application and has high safety. PREPARATION:For example, a compound of formula I wherein Q is group of formula II can be produced according to the reaction formula by reacting a compound of formula V with a compound of formula VI in the presence of a base at -50-+150 deg.C.</p> |
