Certain alkynyl-benzene sulfonamide intermediates useful for preparing ureas herbicides

Abstract

Phenylsulfonamides of Formula II ##STR1## wherein A is a radical of the formula --C.tbd.C--R; R is H, or an optionally substituted (i) C.sub.1 -C.sub.9 alkyl, (ii) C.sub.3 -C.sub.9 cycloalkyl, (iii) phenyl, or (iv) 5-or-6 membered heterocyclic ring; m is one or two; R.sub.1 is hydrogen, halogen, C.sub.1 -C.sub.5 alkyl, C.sub.2 -C.sub.5 alkenyl, or --Y--R.sub.5 ; R.sub.2 is hydrogen, halogen, C.sub.1 -C.sub.5 alkyl, C.sub.2 -C.sub.5 alkenyl, C.sub.1 -C.sub.4 haloalkenyl, --Y--R.sub.5, --COOR.sub.6, --NO.sub.2, or --CO--NR.sub.7 --R.sub.8 ; R.sub.5 and R.sub.6 are each independently C.sub.1 -C.sub.5 alkyl, C.sub.2 -C.sub.5 alkenyl, C.sub.2 -C.sub.6 alkynyl, C.sub.1 -C.sub.5 haloalkyl, C.sub.2 -C.sub.5 haloalkenyl, or C.sub.2 -C.sub.6 alkoxyalkyl; R.sub.7 and R.sub.8 are each independently hydrogen, C.sub.1 -C.sub.5 alkyl, C.sub.2 -C.sub.5 alkenyl, or C.sub.2 -C.sub.6 alkynyl; and Y is oxygen, sulfur, sulfinyl or sulfonyl bridge; or a salt thereof.

Dependencies are inferred from the claim text.