Sumitomo Chemical Company, Limited

Tetsuo Takano

Gohu Suzukamo

Kiyoshi Ikimi

Mitsuhisa Tamura

Masaru Ishino

Hiroshi Yoshihara

Takeshi Yamahara

Rose oxide, which is an important olfactive compound valuable in the art of perfumery, is advantageously produced from citronellol through a novel synthetic route comprising

Process for producing 2-(2'-methyl-1'-propenyl)-4-methyltetrahydropyran

A process for preparing an arylacetaldehyde by reacting the corresponding arylmethyl halide with carbon monoxide and hydrogen in the presence of a cobalt compound and a basic reagent in a liquid medium, characterized in that the basic reagent is an alkali metal compound and the liquid medium is a solvent system chosen from nitriles and their mixtures with hydrocarbons, whereby the arylacetaldehyde can be produced in a good yield by the use of a small amount of the cobalt compound as the catalyst.

Process for preparing arylacetaldehydes

An alcohol is produced in a high selectivity with a good yield from the corresponding carboxylic acid by reducing the latter with hydrogen in the presence of a rhenium catalyst in the coexistence of an organic base. An arylacetic acid, which is included in the starting carboxylic acid, can be produced in an excellent yield from the corresponding aryl aldehyde by reacting the latter with carbon monoxide and water in the presence of rhodium or its compound and hydrogen iodide.

Process for preparing alcohols

Phenols can be produced in a high yield together with useful aldehydes by cleaving a secondary alkylbenzene hydroperoxide in the presence of sulfur, a sulfur oxide or a phosphorus sulfide and then separating the desired phenols from the cleavage product.

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Takatsuki, Japan

Tetsuo Takano