Imperial Chemical Industries Limited

Raymond Elliott

David A Griffin

Raymond L Sunley

John Dalziel

Raymond S Gairns

Brian K Snell

Martin J Rice

Pyrimidine derivatives useful as plant growth regulating agents have the formula (I) : ##STR1## wherein Y is an optionally substituted tertiary alkyl group --C(R.sup.3 R.sup.4 R.sup.5) wherein R.sup.3, R.sup.4 and R.sup.5 are separately hydrogen or an optionally substituted alkyl group, provided that (a) no more than one of R.sup.3, R.sup.4 and R.sup.5 is hydrogen and that (b) R.sup.3, and R.sup.4 and R.sup.5 are not all methyl or halomethyl at the same time and that (c) the group Y contains a total of from 4 to 10 alkyl carbon atoms; R.sup.1 is a group --(CH.sub.2).sub.m --C.ident.C--A or (CH.sub.2).sub.n --CH.dbd.CH--A or (CH.sub.2).sub.p --A wherein A is an optionally substituted phenyl group, m and n are integers from 0 to 2 and p is an integer from 2 to 4, or R.sup.1 contains from 4 to 8 carbon atoms and is optionally substituted alkyl, cycloalkyl, cycloalkylalkyl, alkylcycloalkyl, alkenyl, cycloalkenyl, cycloalkenylalkyl, alkylcycloalkenyl or alkynyl; and R.sup.2 is hydrogen, or an alkyl, alkenyl or alkynyl group containing from 3 to 4 carbon atoms.

Pyramidine derivatives

Triazole compounds useful as plant growth regulators of the formula ##STR1## and stereoisomers thereof, wherein R.sup.1 is selected from alkyl and haloalkyl groups, R.sup.2 is hydrogen, and R.sup.3 is a tertiary butyl group optionally substituted by halogen; and acid addition salts, and metal complexes thereof.

Triazolylmethyl tert-butyl carbinol derivatives which have plant growth

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

This invention relates to heterocyclic compounds useful as plant growth regulating agents, to processes for preparing them, to compositions containing them and to methods of regulating plant growth using them.

Triazole derivatives useful as plant growth regulating agents

Triazolyl alcohol derivatives active as plant growth regulating have the general formula: ##STR1## wherein R.sup.1 is a cycloalkyl or cycloalkenyl group containing from 3 to 8 ring carbon atoms and optionally substituted, for example by lower alkyl or halogen; n is 0 or 1 or 3; R.sup.2 is hydrogen or lower alkyl; and R.sup.3 is a tertiary butyl group optionally substituted by one or more halogen atoms. Triazol-1-yl derivatives are preferred.

Triazolyl ethanol derivatives as plant growth regulators

Pyrimidine derivatives useful as plant growth regulators and fungicides having the general formula (I): ##STR1## wherein Y is optionally substituted cyclopropyl or 1-methyl-cyclopropyl or is optionally halo-substituted isopropyl or t-butyl; R.sup.2 is a group;

Pyrimidine derivatives

A triazole derivative having the general formula (I): ##STR1## and stereoisomers thereof, wherein R.sup.1 is an alkyl group containing from 3 to 6 carbon atoms, or a haloalkyl group containing from 2 to 5 carbon atoms, or a group --CH.sub.2 --Z where in Z is a cycloalkyl group containing from 3 to 5 carbon atoms, R.sup.1 containing primary or secondary carbon atoms only; R.sup.2 is hydrogen or an alkyl group containing from 1 to 4 carbon atoms; and R.sup.3 is a tertiary butyl group optionally substituted by halogen; and salts, esters and metal complexes of the compound of formula (I) wherein R.sup.2 is hydrogen. These compounds are useful as plant growth regulating agents.

Heterocyclic compounds

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.

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.

Growing community of inventors

Nr. Reading, United Kingdom

Raymond Elliott