OMEGA-HYDROXY-(OMEGA-3)-KETOALIPHATIC ESTER, AND ITS PRODUCTION

Title:

OMEGA-HYDROXY-(OMEGA-3)-KETOALIPHATIC ESTER, AND ITS PRODUCTION

Document Type and Number:

Japanese Patent JP11021270

Kind Code:

A

Abstract:

To obtain the subject compound useful as an intermediate ester for a hydroxy fatty acid, which is an important intermediate for large cyclolactone- based perfumes.

This compound is shown by formula I [(n) is 10 or 11; and R is a 1-6C alkyl]. The compound shown by formula I is obtained by heating the γ-butylolactone section of an alkali metal salt of 2-(ω-alkoxycarbonyl alkanoyl)-4-butanolide shown by formula II [(n) is 10 or 11; R is an alkyl; and M is an alkali metal] [e.g. 2-(11-methoxycarbonyl undecanoyl)-γ-butylolactone, and 2-(12-methoxycarbonyl dodecanoyl)-γ-butylolactone] at 80 to 1-10°C for 1 to 20 h, preferably in the presence of 0.5 to 1 equivalent of a weak acid (e.g. phosphoric, pyrophosphoric or carbonic acid), for selective hydrolysis and decarboxylation.

More Like This:

WO/1999/016740	PROCESS FOR PREPARING BETA-KETOESTER FRAGRANCE PRO-ACCORDS FROM 1,3-DIOXAN-4,6-DIONES
WO/2022/268786	PRODUCTION PROCESS FOR 1,2-ALKANEDIOLS AND COMPOSITIONS CONTAINING 1,2-ALKANEDIOLS
JPH0656745	PRODUCTION OF 2-@(3754/24)3-OXOBUTYL)ACRYLIC ACID ALKYL ESTER

Inventors:

Takaoka, Hideaki
Ito, Nobuhiko
Hasebe, Akio
Imamura, Shinzo

Application Number:

JP1997000189022

Publication Date:

January 26, 1999

Filing Date:

June 30, 1997

Export Citation:

Click for automatic bibliography generation Help

Assignee:

SODA KORYO KK
TORAY IND INC

International Classes:

C07C67/32; C07C69/716; C07C67/00; C07C69/00; (IPC1-7): C07C69/716; C07C67/32

Previous Patent: PRODUCTION OF OXYMALONIC ACID

Next Patent: ALICYCLIC DICARBOXYLIC ACID DERIVATIVE