N-sulfonyl carboxylic amide derivative including an N-containing 6-membered aromatic ring, or salt of the same, method for producing the same, and biocide

A method for controlling weed which comprises applying an effective amount of a compound represented by a formula:

• wherein R.sup.1 represents
• a) a C.sub.1-10 alkyl group {optionally having mono-substituent or poly-substituents selected from the group consisting of a halogen atom, a C.sub.3-8 cycloalkyl group, an R.sub.7 O-- group (wherein R.sup.7 represents a C.sub.1-10 alkyl group), an R.sup.7 S(O).sub.n -- group (wherein R.sup.7 has the same meaning as defined above, n is an integer from 0 to 1), an oxiranyl group and an ##STR84## group (wherein R.sup.8 represents a C.sub.1-6 alkoxy group)}, b) a C.sub.2-8 alkenyl gorup (optionally having mono-substituent or poly-substituents selected from the group consisting of halogen atoms),
• c) a C.sub.2-8 alkynyl group,
• d) a C.sub.3-8 cycloalkyl group,
• e) an ##STR85## group wherein R.sup.5 represents i) a C.sub.1-10 alkyl group {optionally having mono-substituent or poly-substituents selected from the group consisting of an R.sub.7 O-- group (wherein R.sup.7 represents a C.sub.1-10 alkyl group)},
• ii) a C.sub.2-8 alkenyl group
• iii) a C.sub.2-8 alkynyl group
• iv) a C.sub.3-8 cycloalkyl group, and
• v) a C.sub.1-6 alkoxy group, and
• R.sup.6 represents a hydrogen atom has the same meaning as or R.sup.5 (R.sup.5 and R.sup.6 may be independent of each other);
• R.sup.2 represents a hydrogen atom or a C.sub.1-10 alkyl group (optionally having a substituent selected from the group consisting of a C.sub.1-6 alkoxy group);
• R.sup.3 and R.sup.4 represent independently a halogen atom, a C.sub.1-10 alkyl group, an R.sub.7 O-- group (wherein R.sup.7 represents a C.sub.1-10 alkyl group),
• an ##STR86## group (wherein R.sup.7 has the same meaning as defined above);
• or salt thereof, as an active ingredient on plants or on soil.