Imperial Chemical Industries Limited

Raymond Alexander Burrell

John M Cox

Margaret C Shephard

John H Marsden

Geoffrey David Snowling

John Michael Cos

Norman Elmore

A process for combating pests, especially fungi, which comprises applying to plants, seeds, or their loci, an isoxazolo [5,4-d] pyrimidine derivative having the formula: ##STR1## or a salt or optical isomer thereof, wherein R is alkyl or aralkyl, either optionally-substituted; R.sub.2 is hydrogen or alkyl; R.sub.3 is alkyl, aryl, alkylthio, alkanesulphonyl, alkoxy, aryloxy, cyano or optionally-substituted amino.

Pesticidal compounds, compositions and processes

Thienopyrimidines of the formula: ##STR1## wherein R.sup.1 is straight or branched chain alkyl containing from 3 to 11 carbon atoms and optionally substituted with cyano or methoxy, cycloalkyl, benzyl optionally substituted on the .alpha. carbon atom with a lower alkyl group or in the ring with one or more alkoxy groups or halogen atoms, dimethylamino, phenylethyl optionally substituted at the .alpha.- or .beta.-carbon atoms with a lower alkyl group, tetrahydrofurfuryl; R.sup.3 is hydrogen or NH.sub.2 ; or R.sup.1 and R.sup.3 together form a carbon chain bridging group optionally saturated and containing one or more nitrogen atoms; R.sup.2 is hydrogen, methyl, ethyl, or chlorine; R.sup.5 is hydrogen or methyl; and R.sup.6 is hydrogen, methyl or acetylamino; or an optical isomer thereof; or a tautomer thereof; or a salt thereof. These and other thienopyrimidines are disclosed as useful for plant growth regulation and for combating fungal, viral and bacterial diseases of plants and insect pests.

Thienopyrimidines

A dihydrotetrazolo[1,5-a]quinazoline compound which in free base form has the formula: ##STR1## wherein R.sup.3 is hydrogen, hydroxy or dialkylamino of from 1 to 4 carbon atoms; R.sup.2 is dialkylamino when R.sup.3 is dialkylamino and R.sup.2 is hydrogen when R.sup.3 is hydrogen or hydroxy; and R is a lower alkyl of from 1 to 4 carbon atoms. Pesticidal compositions containing such compound and priocesses for using the same to combat pests, especially fungi, are also disclosed.

Pesticidal dihydrotetrazolo [1,5-a] quinazoline compound and processes

Pesticidal tetrazole derivatives having the formula: ##STR1## wherein n is 0, 1, 2, 3 or 4; R.sup.1 is OH, halogen, alkyl, alkoxy, alkylthio, alkylsulphonyl, NO.sub.2, NH.sub.2 (optionally substituted), acyl, aroyl, CN, carboxy or sulphonic-acid or -ester or -amide; R.sup.2 is hydrogen or optionally-substituted alkyl; R.sup.3 and R.sup.4 are hydrogen or optionally-substituted alkyl, aryl, cycloalkyl or acetyl but R.sup.4 is not aryl or cycloalkyl if R.sup.3 is one of these two groups; and salts thereof when R.sup.2 is hydrogen.

Growing community of inventors

Camberley, United Kingdom

Raymond Alexander Burrell