| 摘要 |
NEW MATERIAL:A compound of formula I [R1-R3 are alkyl or alkoxyl; R4 and R5 are alkyl or H; R6 is -COOR8, -A-COOR9, -ACONHR8, -ACN, etc. (R8 is alkyl; R9 is H, alkyl, etc.; A is formula II or III); R7 is H, halogen or alkyl; X is O, S, etc.; Y is halogen]. EXAMPLE:beta-[5-(N-Chloroacetyl-2',6'-diethylanilino)methyl-2-furan]pr opionic acid. USE:A herbicide. PREPARATION:A compound of formula VI (B is halogen) is reacted with a compound of formula V in the presence of an acid catalyst, e.g. copper halide or titania-boria, to afford the aimed compound of formula I .
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