Furan- or thiophenecarboxylic-acid propargyl esters

摘要

Furan- and thiophenecarboxylic acid propargyl esters of the formulae Ia and Ib …IMAGE… in which the substituents and the index have the following meaning:… R1, R2 and R3 denote hydrogen, chlorine, bromine, nitro, C1-C4-alkyl, C2-C4-alkenyl, C1-C4-haloalkyl, C2-C4-haloalkenyl, phenyl or phenyl which is substituted by halogen, C1-C4-alkyl or C1-C4-alkoxy,… X denotes oxygen or sulphur,… n denotes the integers 0 or 1, and… in the case in which X represents sulphur, R1, R2 and R3 additionally denote fluorine, cyano, C1-C4-alkoxy, C1-C4-haloalkoxy, C2-C4-alkenyloxy or C2-C4-haloalkenyloxy,… and processes for their preparation and their use for controlling pests.