Fmc Corporation

Sagami Chemical Research Center

Minoru Suda

Kiyoshi Kondo

Toshiyuki Takashima

Kiyosi Kondo

Daiei Tunemoto

Kunikazu Sakai

Akira Negishi

Tamotsu Fujimoto

Toshiyuji Takashima

Processes for producing a (1.alpha., 4.alpha., 5.alpha.)-6,6-dimethyl-4-halo-substituted methyl-3-oxabicyclo[3.1.0]hexan-2-one and its novel intermediates from known and inexpensive starting materials are described and exemplified.

3,4-dihydro-4,4-dimethyl-2H-pyran-2-one, an insecticide intermediate

Processes for producing a (1.alpha., 4.alpha., 5.alpha.)-6,6-dimethyl-4-halo-substituted-methyl-3-oxabicyclo[3.1.0]hexan- 2-one and its novel intermediates from known and inexpensive starting materials are described and exemplified.

Lower alkyl 5-chloro-3,3-dimethyl-5-phenylthiopentanoates useful as

Compounds of the general formula ##STR1## their method of preparation, and their use to control nematodes in agricultural crops are disclosed and exemplified.

1-(Aryl)thiocarbamoyl-2-(aryl)-3-pyrazolidinones and their nematicidal

Novel intermediates for production of insecticidal cis-3-(2,2-disubstituted-ethenyl)-2,2-dimethylcyclopropanecarboxylates, processes for preparing the intermediates, and processes for preparing the final product insecticides via a novel bicyclic lactone intermediate are described and exemplified.

Derivatives of 2H-pyran-2-one

Process for producing

Processes for producing a (1.alpha., 4.alpha., 5.alpha.)-6,6-dimethyl-4-halo-substituted-methyl-3-oxabicyclo[3.1.0]hexan- 2-one and its novel intermediates from known and inexpensive starting materials are described and exemplified. The halomethyl bicyclic lactone is a useful intermediate for the preparation of insecticidal cis-3-(2,2-dihaloethenyl)-2,2-dimethylcyclopropanecarboxylates or cis-3-(2-halo-2-trihalomethylethenyl)-2,2-dimethylcyclopropanecarboxylates .

Processes for producing pyrethroid insecticide intermediates

There are disclosed processes for preparing an aromatic acetic acid by the reaction of an aromatic aldehyde with a combination of a trihalomethane and an alkanethiol, and by the reaction of an alcohol derivative (2,2,2-trihalo-1-arylethanol) with an alkanethiol, in the presence of a base in a mixed medium of water and an aprotic polar solvent.

Process for preparing aromatic acetic acid

A process for preparing a 2-thio-2-substituted-alkanoic acid derivative represented by the formula (I) ##STR1## wherein A, R, R.sup.3 and R.sup.4 are as defined hereinafter, which comprises condensing an aldehyde compound of the formula (V)

Process for preparing 2-thio-2-substituted-alkanoic acid derivatives

5-Cyano-1-hydrocarbylpyrrole-2-acetic acid is converted to 5-acyl-1-hydrocarbylpyrrole-2-acetic acid by reaction with a Grignard reagent followed by hydrolysis. The cyano compound, novel per se, is produced by reacting 1-hydrocarbyl-2-(2',2',2'-trihalo-1'-hydroxyethyl)pyrrole with a cyanating reagent under basic conditions. The latter pyrrole is in turn formed by reacting 1-hydrocarbylpyrrole with trihaloacetaldehyde such as chloral, preferably in the presence of added organic acid catalyst.

1-Hydrocarbyl-pyrrole-2-acetic acid derivatives and their production

Bicyclic lactone derivatives

Process to prepare 3-(2,2-dichloroethenyl)-2,2-di-methylcyclopropanecarboxylic acid enriched with the (+)-cis isomer.

Growing community of inventors

Kanagawa, Japan

Minoru Suda