Sumitomo Chemical Company, Limited

Tohei Takagaki

Noritada Matsuo

Toshihiko Yano

Kazunori Tsushima

Takao Ishiwatari

Yoko Torisu

Hiroko Sekihachi

Hirosi Kisida

Akira Shuto

Kazunori Iwakura

Yoji Takada

Yoshimi Yamada

Hiroshi Souda

Akiko Kakimizu

Hiroko Kishino

Method for producing cyclopropanecarboxylates

A propargyl ester compound of the formula (I), ##STR1## wherein R.sup.1 is hydrogen, halogen, C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy; Z is C.sub.5 -C.sub.10 alkylene which may be substituted with C.sub.1 -C.sub.4 alkyl; and m is an integer of from 1 to 5; with the proviso that when m is an integer of 2 or more, the substituents represented by R.sup.1 may be the same or different; is incorporated into an acaricidal composition as an active ingredient, which can be used for controlling acarines.

Propargyl ester compounds, acaricides containing the same as an active

Pyrethrolone of the formula [II], ##STR1## is produced by reacting a cyclopentenolone derivative of the formula [I], ##STR2## with zinc in an aqueous alcohol solvent. And the cyclopentenolone derivative of the formula [I] is produced by reacting a propargylcyclopentenolone derivative of the formula [III], ##STR3## with vinyl halide in the presence of a palladium catalyst, a copper catalyst and a tertiary amine. These processes permit easy production of pyrethrolone of the formula [II] and an intermediate compound of the formula [I] for the production of the pyrethrolone.

Process for producing pyrethrolone and its intermediate compound

This invention relates to novel carboxylic acid esters represented by the formula (I) below, methods for their production and insecticides and/or acaricides containing them as an active ingredient, ##STR1## wherein R.sup.1 represents a hydrogen atom, a fluorine atom or a methyl group; and R.sup.2 represents a C.sub.1-5 alkyl group, a C.sub.3-6 cycloalkyl group, a C.sub.3-6 alkenyl group, a C.sub.3-6 alkynyl group or a C.sub.1-5 haloalkyl group.

Carboxylic acid esters, methods for producing them and insecticides

This invention relates to a novel carboxylic acid esters represented by the formula (I) below and insecticides containing them as an active ingredient, ##STR1## wherein R represents a C.sub.1-5 alkyl group, a C.sub.3-6 cycloalkyl group, a C.sub.3-6 alkenyl group, a C.sub.3-6 alkynyl group or a C.sub.1-5 haloalkyl group.

Novel carboxylic acid esters and insecticides containing them as an

This invention relates to novel carboxylic acid esters represented by the formula (I) below, methods for their production and insecticides and/or acaricides containing them as an active ingredient, ##STR1## wherein R.sup.1 represents a C.sub.1-5 alkyl group, a C.sub.2-4 alkenyl group or a C.sub.2-4 alkynyl group; R.sup.2 represents a fluorine atom or a methyl group; and R.sup.3 represents a hydrogen atom or a methyl group.

Novel carboxylic acid esters, methods for producing them and

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Takarazuka, Japan

Tohei Takagaki