The invention relates to compounds of formula (I), and their use as herbicides. In said formula, R1 to R9 represent groups such as hydrogen, halogen or organic groups such as alkyl, alkenyl, alkynyl, or alkoxy; X is a bond or a divalent unit; Y is hydrogen, cyano, hydroxyl or a linear or cyclic organic group. The invention further refers to a composition comprising such compound and to the use thereof for controlling unwanted vegetation.
[EN] A PROCESS FOR THE PREPARATION OF ESTERS<br/>[FR] PROCEDE DE PREPARATION D'ESTERS
申请人:BNFL FLUOROCHEMICALS LTD.
公开号:WO1997000848A1
公开(公告)日:1997-01-09
(EN) A process for the preparation of an ester, especially fluorinated esters R1O.OC-CFR2-CO.OR3.R1 and R3 are each independently selected from alkyl, cycloalkyl and aryl. R2 is selected from hydrogen, alkyl, cycloalkyl. The method includes the steps of covering a corresponding compound of formula 2: R1O.OC-CHR2-CO.OR3 in the presence of a base, of salt of a compound of formula 2, into corresponding compound of formula 1 by the reaction of elemental fluorine.(FR) L'invention concerne un procédé permettant de préparer des esters, notamment des esters fluorés R1O.OC-CFR2-CO. R1 et R3 sont sélectionnés chacun indépendamment l'un de l'autre entre alkyle, cycloalkyle et aryle. R2 est sélectionné entre hydrogène, alkyle et cycloalkyle. Le procédé comprend la conversion d'un composé correspondant de la formule 2: R1O.OC-CHR2-CO.OR3 en présence d'une base ou d'un sel d'un composé de la formule 2, en un composé correspondant de la formule 1, par réaction du fluor élémentaire.