Verfahren zur Herstellung von 3,5-Dimethyldodecansäure und 4-Carboxy-3,5-Dimethyl-3,5-Dodecansäure

Details

Veröffentlichungs-Nr.

EP2949642

Aktenzeichen

EP15168196

Anmeldetag

19. Mai 2015

Veröffentlichung

18. Oktober 2017

Erteilung

18. Oktober 2017

Rechtsraum

EP

IPC

C07C67/343C07C51/09C07C51/36C07C51/38C07C57/13C07C57/03C07C53/126

Abstract

Provided are a short process for simply and efficiently producing 3,5-dimethyldodecanoic acid, which is an active ingredient of the pheromone of California prionus, and 4-carboxy-3,5-dimethyl-3,5-dodecadienoic acid which is an intermediate useful for producing 3,5-dimethyldodecanoic acid. More specifically, provided is a method for producing 3,5-dimethyldodecanoic acid, comprising the steps of subjecting 3-methyl-2-pentene-1,5-diacid diester (1) and 2-nonanone (2) to a condensation reaction and subsequent hydrolysis into 4-carboxy-3,5-dimethyl-3,5-dodecadienoic acid (3); decarboxylating or decarboxylating and hydrolyzing the 4-carboxy-3,5-dimethyl-3,5-dodecadienoic acid (3) into 3,5-dimethyl-2,4-dodecadienoic acid (4); and hydrogenating the 3,5-dimethyl-2,4-dodecadienoic acid (4) into 3,5-dimethyldodecanoic acid (5), as shown in the following scheme: <img class="EMIRef" id="471227630-ia01" />

Anmelder

Firma

Shin-Etsu Chemical Co., Ltd.

Land

🇯🇵 Japan

Fachgebiete