METHOD FOR PRODUCING ε-CAPROLACTAM

Title:

METHOD FOR PRODUCING ε-CAPROLACTAM

Document Type and Number:

WIPO Patent Application WO/2021/100759

Kind Code:

A1

Abstract:

The present invention synthesizes ε-caprolactam from 5-cyanovaleramide with high yield by means of the steps (A) and (B) described below. (A) a step for obtaining 5-cyanovaleramide hydrogenation reaction mixture by causing 5-cyanovaleramide to react with hydrogen in an aqueous solvent in the presence of a hydrogenation catalyst (B) a step for obtaining ε-caprolactam by heating the 5-cyanovaleramide hydrogenation reaction mixture, which has been obtained in the step (A), to a temperature of from 180°C to 300°C in an aqueous solvent

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WO/2005/005373	A PROCESS FOR THE PREPARATION OF CHIRALLY PURE N-(TRANS-4-ISOPROPYL-CYCLOHEXYLCARBONYL)-D-PHENYLALANINE AND CRYSTALLINE MODIFICATIONS THEREOF
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Inventors:

TSUKAMOTO DAIJIRO (JP)
KAWAMURA KENJI (JP)
YAMADA KATSUSHIGE (JP)
AKAHIRA MASATO (JP)
YAMAMOTO DAISUKE (JP)

Application Number:

PCT/JP2020/042999

Publication Date:

May 27, 2021

Filing Date:

November 18, 2020

Export Citation:

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Assignee:

TORAY INDUSTRIES (JP)

International Classes:

C07C231/12; C07C237/06; C07D201/08

Foreign References:

JP2003530380A	2003-10-14
JPH08301843A	1996-11-19
JPS4631539B1	1971-09-13
JPS499473B1	1974-03-05
US3331866A	1967-07-18

Other References:

BIOORGANIC AND MEDICINAL CHEMISTRY, vol. 7, 1999, pages 2239 - 2245
See also references of EP 4063345A4

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