| 摘要 |
<p>Cpds. of formula (I) are new. In (I), R' is H or COOR3; R is a gp. of formulae (A)-(E): provided that R is not (A) when R' is COOR3; R1 is H or lower alkyl; R2 is lower alkyl; W is O, S or NH; Q is O or S; Y and Z are H, lower alkyl, haloalkyl, alkoxy or haloalkoxy, halogen, NO2 or CN; X' and X" are H, lower haloalkyl, lower alkoxy, halogen or NO2, provided that X' and X" are not both CF3, OMe or NO2. (I) a-e herbicides with pre- and/or post-emergence activity, esp. against grasses.</p> |
