3-Fluoropyridyl-2-oxy-phenoxy derivatives having herbicidal activity
申请人:Ciba-Geigy Corporation
公开号:US04832736A1
公开(公告)日:1989-05-23
New 3-fluoropyridyl-2-oxy-phenoxy derivatives are disclosed which have a herbicidal and plant growth inhibiting action. They correspond to the formula ##STR1## wherein X is halogen or trifluoromethyl, G is a C.sub.1 -C.sub.3 -alkylene chain which can be mono- or disubstituted by methyl or phenyl, m is zero or one, R.sup.12 and K.sup.13 are each C.sub.1 -C.sub.6 -alkyl and R.sup.17 is hydrogen, C.sub.1 -C.sub.2 -alkyl or methoxymethyl. These compounds are suitable for the selective control of weeds in crops of cultivated plants, or for the reduction of the growth of grasses.
Certain pyridyloxy or thio-phenoxy-propanoic acids or salts thereof
申请人:The Dow Chemical Company
公开号:US04678509A1
公开(公告)日:1987-07-07
Certain novel pyridinyloxyphenoxy alkanoic acids, pyridinylthiophenoxy alkanoic acids, derivatives thereof and related compounds are described. More specifically, these novel compounds bear a fluorine substituent in the 3-position of the pyridinyl group and in the 5-position the substituent is selected from chlorine, CF.sub.3, CF.sub.2 Cl or CF.sub.2 H. These novel compounds exhibit surprising preemergent and postemergent activity in the control of grassy weeds.
There are described novel 2-[4-(5-chloro-3-fluoropyridin-2-yloxy)-phenoxy]-propionic acids esters and -thio-esters having a herbicidal action and an action reducing the growth of grasses, which compounds correspond to the formula I ##STR1## wherein Q is oxygen or sulfur, R.sub.1 is hydrogen or methyl R.sub.2 is hydrogen or C.sub.1 -C.sub.4 alkyl The salts and enantiomers of these compounds are also part of the invention. These compounds are suitable for selectively controlling weeds in crops of cultivated plants, and for reducing the growth of grasses.
There is described the 2-[4-(5-chloro-3-fluoropyridin-2-yloxy)-phenoxy]-propionic acid propynyl ester and its (R)-enantiomer of formula I ##STR1## These compounds are suitable for selectively controlling weeds in crops of cultivated plants, or for reducing the growth of grasses.