| 摘要 |
Compounds are prepared which correspond to the formula <IMAGE> wherein X represents chloro, bromo or iodo; R' represents hydrogen or methyl and R represents carboxy (-COOH), the alkyl esters thereof (-COOR6 wherein R6 represents alkyl of 1 to 8 carbon atoms, (2-alkoxyethoxy)carbonyl (-COOCH2CH2OR2) or (1-methyl-2-alkoxyethoxy)carbonyl <IMAGE> wherein R2 represents alkyl of 1 to 4 carbon atoms) or the metal salts thereof (-COOMe wherein Me represents ammonium or substituted ammonium ion (N+H(R6)3 wherein each R6 independently represents hydrogen, alkyl of 1 to 4 carbon atoms or hydroxyalkyl of 2 to 3 carbon atoms), alkali metal, alkaline earth metal, aluminum or a transition group metal); alkanoyloxymethyl (-CH2OCOR2); (2,2-dichloropropionyloxy)methyl (-CH2OCOC(Cl)2CH3); alkoxymethyl (-CH2OR2); phenoxymethyl (-CH2O phi ); (2-alkoxyethoxy)methyl (-CH2OCH2CH2OR2); hydroxyalkyl (-R3OH wherein R3 represents alkylene of from 1 to 6 carbon atoms); 3-hydroxy-1-propenyl (-CH=CHCH2OH); 1,2-dihydroxyethyl <IMAGE> 1-(2-hydroxyethoxy)methyl (-CH2-O-CH2CH2OH); (2-(2-hydroxyethoxy)ethoxy)methyl (-CH2OCH2CH2OCH2CH2OH); carbamoyl (-CONR4R4 wherein each R4 independently represents hydrogen or alkyl of 1 to 8 carbon atoms); (carboxymethyl)carbamoyl (-CONHCH2COOH); (2-hydroxyethyl)-carbamoyl (-CONR4CH2CH2OH); or (carbamoyloxy)methyl (-CH2OCONHR5 wherein R5 is alkyl of 1 to 4 carbon atoms or phenyl). These compounds have been found to be effective pre- and post-emergent herbicides and some as intermediates in preparing compounds which are effective pre- and post-emergent herbicides and as active agents in compositions used as herbicides.
|
