Intermediates for herbicidal sulfonamides

A compound selected from:

• ##STR64## wherein R is C.sub.1 -C.sub.12 alkyl;
• C.sub.3 -C.sub.10 alkenyl;
• C.sub.3 -C.sub.10 alkynyl;
• C.sub.2 -C.sub.6 alkyl substituted with one to four substituents selected from 0-3 atoms of F, Cl, Br or 0-2 methoxy groups;
• C.sub.3 -C.sub.6 alkenyl substituted with 1-3 atoms of F, Cl or Br;
• C.sub.5 -C.sub.8 cycloalkyl;
• C.sub.5 -C.sub.8 cycloalkenyl;
• C.sub.5 -C.sub.8 cycloalkyl substituted with substituents selected from one to four methyl groups, methoxy, alkyl substituents of C.sub.2 -C.sub.4, F, Cl or Br;
• C.sub.4 -C.sub.10 cycloalkylalkyl;
• C.sub.4 -C.sub.8 cycloalkylalkyl with 1-2 CH.sub.3 ;
• --CH.sub.2 CH.sub.2 OR.sub.7 ;
• CH.sub.2 CH.sub.2 CH.sub.2 OR.sub.7 or ##STR65## where R.sub.7 is --CH.sub.2 CH.sub.3, CH(CH.sub.3).sub.2, phenyl, --CH.sub.2 CH.sub.2 Cl, --CH.sub.2 CCl.sub.3 ;
• --CH.sub.2 CH.sub.2 O).sub.n' R.sub.8 or ##STR66## where R.sub.8 is CH.sub.3, --CH.sub.2 CH.sub.3, --CH(CH.sub.3).sub.2, phenyl, --CH.sub.2 CH.sub.2 Cl or --CH.sub.2 CCl.sub.3 and n' is 2 or 3;
• R.sub.2 is H, Cl, Br, F, C.sub.1 -C.sub.3 alkyl, --NO.sub.2, --OCH.sub.3, --SCH.sub.3, CF.sub.3, SO.sub.2 CH.sub.3, N(CH.sub.3).sub.2, CN, or 4--N.dbd.C.dbd.O;
• and
• R.sub.3 is H, Cl, Br or CH.sub.3 with the proviso that when R is other than C.sub.3 -C.sub.10 alkynyl, then R.sub.2 must be 4--NCO.