Shell Research Limited

Shell Internationale Research Maatschappij, B.v.

Andrew Flood

David P Astles

Trevor W Newton

David C Hunter

John E Spencer

Alastair McArthur

Compounds of the formula ##STR1## in which A is nitrogen or CR.sup.5 ;

Sulphonamide herbicides

Compounds of formula I ##STR1## wherein A is nitrogen or a group CR.sup.5 ;

Herbicidal compounds

Compounds of the formula: ##STR1## wherein X, Y and Z are hydrogen, halogen, alkyl, haloalkyl, hydroxy, alkoxyalkyl, alkoxy, haloalkoxy, cycloalkyl, substituted aryl, alkylthio, arylthio, substituted amino or --CO.sub.2 R.sup.7, wherein R.sup.7 is hydrogen, optionally substituted alkyl, cycloalkyl, aryl or aralkyl, or X and Y together or Y and Z together form a ring R.sup.1 is --A--CH.dbd.CHCH.sub.3, --A--C.tbd.CCH.sub.3, --A--CH.sub.2 CH.dbd.CH.sub.2, --A--CH.sub.2 C.tbd.CH, --A(CH.sub.2).sub.n Br, --A(CH.sub.2).sub.n B(CH.sub.2).sub.m BR, ##STR2## or --A(CH.sub.2).sub.n R.sup.8, optionally substituted wherein A and B are --O--, --S-- or --NR, B.sup.1 is a direct bond, --O--, --S-- or --NR, n and m are integers from 1 to 3, p is 0, 1 or 2, R is hydrogen, optionally substituted alkyl, cycloalkyl, aryl or aralkyl and R.sup.8 is optionally substituted aryl;

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Cowley, United Kingdom

Andrew Flood