申请人:BASF Aktiengesellschaft
公开号:US05034049A1
公开(公告)日:1991-07-23
Thiophene-2-carboxylic acid derivatives of the general formula I ##STR1## where R.sup.1 to R.sup.3 are each hydrogen, halogen, branched or straight-chain C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.8 -alkoxy, C.sub.1 -C.sub.6 -haloalkyl, C.sub.1 -C.sub.6 -haloalkoxy, nitro, cyano, unsubstituted phenyl or phenyl which is mono- to trisubstituted by C.sub.1 -C.sub.4 -alkyl, halogen, C.sub.1 -C.sub.5 -haloalkyl, C.sub.1 -C.sub.4 -alkoxy or C.sub.1 -C.sub.5 -haloalkoxy; X is --OR.sup.4 or --NH--OR.sup.5, R.sup.4 being branched or straight-chain C.sub.3 -C.sub.10 -alkynylalkyl which is unsubstituted or substituted by halogen; and R.sup.5 being branched or straight-chain C.sub.1 -C.sub.5 -alkyl which is unsubstituted or substituted by halogen, or branched or straight-chain C.sub.3 -C.sub.10 -alkynylalkyl which is unsubstituted or substituted by halogen; with the proviso that R.sup.4 is not propargyl when R.sup.2 and R.sup.3 are both hydrogen or when R.sup.2 is halogen or R.sup.3 is chlorine, methyl or methoxy. The compounds I are suitable for combating the growth of unwanted plants.
通式I的噻吩-2-羧酸衍生物##STR1##其中R.sup.1至R.sup.3分别是氢、卤素、支链或直链C.sub.1-C.sub.6-烷基、C.sub.1-C.sub.8-烷氧基、C.sub.1-C.sub.6-卤代烷基、C.sub.1-C.sub.6-卤代烷氧基、硝基、氰基、未取代苯基或经C.sub.1-C.sub.4-烷基、卤素、C.sub.1-C.sub.5-卤代烷基、C.sub.1-C.sub.4-烷氧基或C.sub.1-C.sub.5-卤代烷氧基单取代至三取代的苯基; X为--OR.sup.4或--NH--OR.sup.5,其中R.sup.4为支链或直链C.sub.3-C.sub.10-炔基烷基,未取代或经卤素取代; R.sup.5为支链或直链C.sub.1-C.sub.5-烷基,未取代或经卤素取代,或支链或直链C.sub.3-C.sub.10-炔基烷基,未取代或经卤素取代; 但R.sup.4不为丙炔基当R.sup.2和R.sup.3都是氢或当R.sup.2是卤素或R.sup.3是氯、甲基或甲氧基时。化合物I适用于防治不受欢迎植物的生长。