Sankyo Company, Limited

Rei Okazaki

Shunshi Kojima

Hiroshi Miyamoto

Hisaki Kajino

Yutaka Ikeuchi

Hideharu Yokokawa

A method for preparing a compound having the following formula (I) by reducing a nitro group of the following formula (III) followed by carrying out an intramolecular dehydration condensation, wherein Ris hydrogen, alkyl, cycloalkyl, phenyl or a 5- or 6-membered heterocyclic, and X is oxygen, sulfur or nitrogen.

Intermediate of 6-substituted 1-methyl-1-H-benzimidazole derivative and method for producing same

A method for producing highly pure enamines, which comprises reacting an aldehyde or ketone with an amine and treating the resulting reaction mixture with an acidic aqueous solution at a temperature between 0&#xb0; C. and 30&#xb0; C.

Process for production of high-purity enamines

A process for the production of a &#x3b3;-ketoacetal compound wherein the desired product is obtained by a simple procedure in a high yield as a high purity product. The reaction scheme for the process is as follows: wherein Ar is an aryl group; X is a halogen atom; Rand Ris an alkyl or alkoxy group; and

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Hiratsuka, Japan

Rei Okazaki