Herbicidal substituted 3-aryl-pyrazoles

Process for preparing a compound of Formula I:

• ##STR13## comprising reacting a compound of Formula A:
• ##STR14## with a suitable base followed by reacting the resultant anion with a C.sub.1-6 alkyl halide, di(C.sub.1-6 alkyl)sulfate or di(C.sub.1-6 alkyl)formamide;
• and wherein in Formula A and Formula I,
• R.sub.1 is independently C.sub.1-8 alkyl;
• C.sub.3-8 cycloalkyl, cycloalkenyl, cycloalkylalkyl, or cycloalkenylalkyl;
• C.sub.2-8 alkenyl or alkynyl;
• benzyl;
• or said R.sub.1 members substituted with halogen, amino, nitro, cyano, hydroxy, alkoxy, alkylthio, ##STR15## YR.sub.10, or NR.sub.11 R.sub.12 ;
• R.sub.2 is C.sub.1-6 haloalkyl;
• R.sub.3 is C.sub.1-6 alkyl, CHO or CH.sub.2 OH;
• R.sub.4 members are independently an R.sub.1 member, thioalkyl, polyalkoxyalkyl, carbamyl, halogen, amino, nitro, cyano, hydroxy, ##STR16## YR.sub.10, or NR.sub.11 R.sub.12 group;
• X is O, S(O).sub.m, NR.sub.19 or CR.sub.20 R.sub.21 ;
• Y is O, S(O).sub.m or NR.sub.22 ;
• R.sub.8-22 are hydrogen, C.sub.1-8 alkyl, C.sub.3-8 cycloalkyl, cycloalkenyl, cycloalkylalkyl, or cycloalkenylalkyl, C.sub.2-8 alkenyl or alkynyl, benzyl, or said R.sub.1 members substituted with halogen, amino, nitro, cyano, hydroxy, alkoxy, alkylthio, halogen, amino, nitro, cyano, hydroxy, aryl, aralkyl, alkaryl, carboxyl, alkoxyalkyl, alkylamino, dialkylamino, alkoxy, or carbamyl;
• m is 0-2;
• n is 1-5;
• and
• Z is chlorine, bromine or iodine.