Nissan Chemical Industries Limited

Yoshihiro Iwasawa

Fumio Suzuki

Susumu Yamamoto

Hiroshi Murakami

Isao Hashiba

Kenji Suzuki

Kiyomi Ozawa

Takasi Ikai

Yoshinori Ochiai

Tosihiko Oguti

Toshiaki Sato

Shigekatu Okamoto

Hiroki Takahashi

Eizo Katakura

Masayuki Ogawa

Disclosed herein is a process for producing N-alkylpyrazoles represented by the formula (1), which comprises reacting an alkali metal or an alkali metal-containing base with N- unsubstituted pyrazoles represented by the formula (2), to form an alkali metal salt thereof and, subsequently, reacting the obtained alkali metal salt with an alkylating agent. ##STR1##

Process for producing n-alkylpyrazoles

There are disclosed halogeno-4-methylpyrazoles represented by the formula (I): ##STR1## wherein R represents an alkyl group having 1 to 4 carbon atoms, a substituted or unsubstituted phenyl group or a substituted or unsubstituted pyridyl group; X represents a hydrogen atom or a halogen atom; and Y represents a halogen atom, and a process for preparing the same which comprises reacting 1-substituted-4-methylpyrazoles of the formula (II): ##STR2## wherein R has the same meaning as defined above, with a halogen.

Halogeno-4-methylpyrazoles

Disclosed herein is a process for producing N-alkylpyrazoles represented by the formula (1), which comprises reacting an alkali metal or an alkali metal-containing base with N- unsubstituted pyrazoles represented by the formula (2), to form an alkali metal salt thereof and, subsequently, reacting the obtained alkali metal salt with an alkylating agent. ##STR1## R.sup.1 : H, C.sub.1 -C.sub.4 alkyl; R.sup.2 : C.sub.1 -C.sub.4 alkyl;

Process for producing N-alkylpyrazoles

Disclosed is a novel pyrazolesulfonylurea derivative represented by the formula (I), preparation thereof, a herbicide containing said derivative as an active ingredient and a herbicidal method by use thereof. ##STR1## (wherein A, B, C, D, X, Y and Z are as defined in the specification).

Pyrazolesulfonylurea derivatives, preparation thereof, herbicide

Soil fungi-inhibiting agent containing as the active ingredient one or more of the compounds represented by the following general formula ##STR1## wherein I. WHEN BOTH X and Y are oxygen atoms, Z is hydrogen atom, unsubstituted alkyl group, unsubstituted alkenyl group, ##STR2## (in this case the compound is p-toluene sulfonate), NH.sub.2 CH.sub.2 -- (in this case the compound is p-toluene sulfonate), acyl group, ClCH.sub.2 CONH--, or alkyl group substituted by substituents such as R.sub.1 COO--, CH.sub.3 COS--, R.sub.2 O--, R.sub.2 S--, HO--, HOOC--, CH.sub.3 CONH--, acyl group, alkoxyacyl group, where R.sub.1 is lower-alkyl group or alkenyl group, R.sub.2 is lower-alkyl group or benzyl group;

Soil fungi inhibiting agent

Growing community of inventors

Funabashi, Japan

Yoshihiro Iwasawa