Kuraray Co., Ltd.

Kurary Company, Ltd.

Toshihiro Omatsu

Yasuo Tokitoh

Takashi Onishi

Noriaki Yoshimura

Koji Hirai

Takuo Tsuruta

Makoto Yano

Yoichi Matsumoto

Naoya Minamoto

Jin Tokuyasu

Masahiko Kitayama

Masao Ishida

Masahiro Muranaka

Keiji Kubo

A method of producing 1,5-pentanedial having an alkyl group at the 3-position, including a step of hydroformylating an aldehyde compound represented by the following general formula (1): wherein Rrepresents an alkyl group having from 1 to 6 carbon atoms.

Method of producing dialdehyde compound

It is provided a process for industrially advantageously producing a branched aldehyde represented by the formula; ##STR1## �wherein Y represents an acyl group of two or more carbon atoms; and X represents an acyloxymethyl group represented by --CH.sub.2 OY' (where Y' represents an acyl group of two or more carbon atoms), cyano group or an alkoxycarbonyl group! which is useful as an intermediate for pharmaceuticals and agricultural chemicals, comprising subjecting an olefinic compound represented by the following formula; ##STR2## (wherein Y and X are the same as defined above), to the reaction with hydrogen and carbon monoxide in the presence of a rhodium compound and a tertiary organic phosphorus compound with an electronic parameter (.upsilon.-value) of 2080 to 2090 cm.sup.-1 or with a steric parameter (.theta.-value) of 150 to 180.degree..

Process for producing branched aldehydes

Hydroformylation process

2-Hydroxy-4-methyltetrahydrofuran is prepared by reacting 2-methyl-2-propen-1-ol with hydrogen and carbon monoxide in the presence of:

Process for producing 2-hydroxy-4-methyltetrahydrofuran

In hydroformylation comprising allowing an ethylenically unsaturated compound to react with carbon monoxide and hydrogen in the presence of a catalyst to convert it into a corresponding aldehyde, the catalyst is a rhodium-containing catalyst comprising;

Rhodium-containing catalyst

A process for producing 2-formyl-1,4-butanediol comprises effecting reaction of 2-butene-1,4-diol with hydrogen and carbon monoxide in the presence of: (a) a rhodium compound,

Process for producing 2-formyl-1,4-butanediol

Novel trimethylolheptanes having three highly reactive hydroxyl groups are provided. They are useful as raw materials for the production of polyesters for use in or as raw materials or modifiers for paints, inks, adhesives, coating compositions and molding resins. Uses for the trimethylolheptanes are also provided.

Trimethylolheptanes and use thereof

A hydroformylation process is provided which comprises reacting a compound of the general formula

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Kamisu-machi, Japan

Toshihiro Omatsu