Imperial Chemical Industries Limited

David A Griffin

David J Collins

Raymond Elliott

David Cartwright

John M Cox

John E Barton

David Rees Parry

John M Clough

Paul A Worthington

Margaret C Shephard

Raymond L Sunley

Raymond S Gairns

Martin J Rice

Balsubramanyan Sugavanam

Pyrazine derivatives useful as plant growth regulating agents have the general formula: ##STR1## and stereoisomers thereof, wherein R.sup.1 is C.sub.1 -C.sub.4 alkyl optionally substituted with halogen, or cyclopropyl optionally substituted with C.sub.1 -C.sub.4 alkyl; R.sup.2 is C.sub.1 -C.sub.8 alkyl, C.sub.2 -C.sub.8 alkenyl, or C.sub.2 -C.sub.8 alkynyl each optionally substituted with halogen; C.sub.3 -C.sub.6 cycloalkyl, C.sub.3 -C.sub.6 cycloalkenyl, C.sub.3 -C.sub.6 cycloalkylalkyl, C.sub.3 -C.sub.6 cycloalkenylalkyl, phenylalkenyl or phenylalkynyl each optionally substituted on the ring group; R.sup.3 is hydrogen or C.sub.1 -C.sub.4 alkyl; R.sup.4 is hydrogen, C.sub.1 -C.sub.4 alkyl, halogen, alkylamino, cyano, or alkoxy; n is 0 or 1; and salts, ethers, acylates and metal complexes thereof.

Pyrazine compound useful as plant growth regulators

A pyrimidine derivative having the general formula (I): ##STR1## and stereoisomers thereof, wherein Y is optional substituted cyclopropyl or optionally substituted 1-methylcyclopropyl or is the group: ##STR2## wherein R.sup.1 is hydrogen or methyl; X is hydrogen or halogen; R.sup.2 is an optionally substituted alkyl, cycloalkyl, cycloalkylalkyl or alkylcycloalkyl group, each of said groups containing a total of from 4 to 8 carbon atoms; or is an optionally substituted alkenyl, cycloalkenyl, cycloalkenylalkyl, or alkylcycloalkenyl group, each of said groups containing a total of from 4 to 8 carbon atoms; or is an optionally substituted alkynyl group containing a total of from 4 to 8 carbon atoms; and R.sup.3 is hydrogen, an alkyl group containing from 1 to 4 carbon atoms, an alkenyl group containing from 3 to 4 carbon atoms or an alkynyl group containing from 3 to 4 carbon atoms; and agrochemically acceptable salts, esters and metal complexes of the compounds of formula (I) wherein R.sup.3 is hydrogen. These compounds are useful as plant growth regulating agents and fungicides.

Pyrimidine derivatives

A compound having the general formula: ##STR1## and stereoisomers thereof, wherein R.sup.1 is alkyl, alkenyl, alkynyl, cycloalkyl or cycloalkenyl, all having up to 8 carbon atoms; or is aryl, aralkyl or heterocyclyl, any of which may be optionally substituted; R.sup.2 is alkyl, alkenyl, alkynyl, alkynylalkenyl, alkenyl alkynyl, cycloalkyl, cycloalkenyl, or cycloalkylalkyl, all of which contain up to 8 carbon atoms and may be substituted; R.sup.3 and R.sup.4, which can be the same or different, are hydrogen (but are not both hydrogen) or are alkyl of up to 4 carbon atoms, alkoxy of up to 4 carbon atoms, OCF.sub.3, CF.sub.3 or halogen, or together constitute a ring of 3-6 carbon atoms; and Y is .dbd.CH-- or .dbd.N--; and esters, ethers, salts and metal complexes thereof. The compounds are useful as plant growth regulating agents.

Heterocyclic compounds

Diphenyl ethers of formula: ##STR1## wherein A is hydrogen or one of a specified range of substituents e.g. halogen, hydroxy, haloalkyl, B, C, E and F are hydrogen or specified substituents; D is CF.sub.3, halogen, or an other specified substituent; and R is a group --CONR.sup.4 SO.sub.2 R.sup.3 wherein R.sup.4 is hydrogen or C.sub.1 to C.sub.4 alkyl and R.sup.3 is an optionally substituted alkyl, alkenyl, alkynyl, or aryl radical; useful as selective herbicides.

Diphenyl ether carboxylic acids and salts and esters thereof useful as

A compound having the general formula (I): ##STR1## and stereoisomers thereof, wherein W is CH or N; Q is optionally substituted aryl, optionally substituted aralkyl, or alkyl; R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, and R.sup.8, which may be the same or different, are H, hydroxy, alkyl, cycloalkyl, optionally substituted aralkyl, or optionally substituted phenyl, or any of the pairs R.sup.1 and R.sup.2 ; R.sup.3 and R.sup.4 ; R.sup.5 and R.sup.6 ; or R.sup.7 and R.sup.8 can, together with the adjacent ring carbon atom, represent a carbonyl group (C.dbd.O); R.sup.9 and R.sup.10 which may be the same or different, are H, alkyl, cycloalkyl, optionally substituted aralkyl, or optionally substituted phenyl; n is 0 or 1; and acid salts and metal complexes thereof. The compounds have plant growth regulating and fungicidal activity.

Triazole and imidazole compounds useful as plant growth regulators and

Diphenyl ethers of formula: ##STR1## wherein A is hydrogen or one of a specified range of substituents e.g. halogen, hydroxy, haloalkyl, B, C, E and F are hydrogen or specified substituents; D is CF.sub.3, halogen, or another specified substituent; and R is a group --CONR.sup.4 SO.sub.2 R.sup.3 wherein R.sup.4 is hydrogen or C.sub.1 to C.sub.4 alkyl and R.sup.3 is an optionally substituted alkyl, alkenyl, alkynyl, or aryl radical; useful as selective herbicides.

Diphenyl ether herbicides

Herbicidal urea derivatives

Herbicidal and fungicidal compounds of the formula: ##STR1## wherein rings A and B are unsubstituted or carry one or more substituents which may be lower alkyl, halogen, lower alkoxy, cyano, nitro, lower alkylcarbonyloxy, methylene dioxy, amino, or mono- or dialkyl amino, and Het is a 1,2,4-triazolyl or imidazolyl group.

Growing community of inventors

Bracknell, United Kingdom

David A Griffin