Osaka Gas Company Limited

Otsuka Kagaku Yakuhin Kabushiki Kaisha

Otsuka Kagaku Kabushiki Kaisha

Otsuka Kagaku Yakuhin Kabushiki Kaishi

Tatsuya Shono

Ryoichi Nishida

Shinichi Kawasaki

Yoshihiro Matsumura

Shigenori Kashimura

Method for producing silicon network polymers

Processes for preparation of polysilane

This invention provides a process for preparing an .alpha.-alkylated acetic acid derivative represented by the formula ##STR1## wherein Z is --COOR or --CN in which R is straight-chain or branched-chain alkyl, cycloalkyl, substituted or unsubstituted phenyl, or substituted or unsubstituted aralkyl, R' is substituted or unsubstituted straight-chain or branched-chain alkyl or alkenyl, and Y is an optionally substituted heterocyclic group or optionally substituted aromatic group, the process comprising subjecting an acetic acid derivative represented by the formula

Electrolytic process for preparation of .alpha.-alkylated acetic acid

This invention relates to a process for preparing an aryl acetic acid derivative represented by the formula

Process for preparing aryl acetic acid derivatives

A process for preparing cyclopentenone derivatives represented by the formula: ##STR1## wherein R.sub.1 is methyl or ethyl, and R.sub.2 is hydrogen, methyl or acetyl, characterized in that a 1,4-diketone derivative represented by the formula:

Process for preparing cyclopentenone derivatives

A process for preparing a 3-oxy-4H-pyran-4-one derivative which comprises the steps of:

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Kyoto, Japan

Tatsuya Shono