| 摘要 |
NEW MATERIAL:A compound expressed by formula I [R<1> is lower alkyl, lower alkenyl, phenyl which may be substituted, etc,; A is formula VI (R<2> and R<3> are lower alkyl) or formula VII (Z is O or S; p is 0 or 1; q and r are integers 0-4), etc.; X is H or halogen; Y is O or S; m is 1 or 2; n is an integer 0-2]. EXAMPLE:2,4-Dichloro-5-methylthiomethoxyphenyl 1-pyrrolidinecarboxylate. USE:A herbicide. PREPARATION:A compound expressed by formula II (X<1> is halogen) is reacted with an alkali metal salt of chlorinated resorcinol expressed by formula III (M is alkali metal) to give a compound expressed by formula IV, which is then reacted with a compound expressed by formula V in the presence of a base to afford the aimed compound expressed by formula I . |
