METHOD FOR PRODUCING (E)-2-ISOPROPYL-5-METHYL-2,4-HEXADIENYL ACETATE

• Main Authors: ISHIBASHI NAOKI, YUMOTO YOSHIYASU, KANAO TAKESHI
• Format: Patent
• Language: English; Japanese
• Published: 18.06.2015
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; AGRICULTURE; ANIMAL HUSBANDRY; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES; CHEMISTRY; FISHING; FORESTRY; HUMAN NECESSITIES; HUNTING; METALLURGY; ORGANIC CHEMISTRY; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS; PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF; TRAPPING

PROBLEM TO BE SOLVED: To provide a simple and efficient method for producing (E)-isopropyl-5-methyl-2,4-hexadienyl acetate.SOLUTION: There is provided a method for producing (E)-2-isopropyl-5-methyl-2,4-hexadienyl acetate which comprises: a step of isomerizing 2-isopropenyl-5-methyl-4-hexenoic acid (1) to obtain (E)-2-isopropyl-5-methyl-2,4-hexadienoic acid (2); a step of reducing the resulting (E)-2-isopropyl-5-methyl-2,4-hexadienoic acid (2) to obtain (E)-2-isopropyl-5-methyl-2,4-hexadienol (3); and a step of acetylating the resulting (E)-2-isopropyl-5-methyl-2,4-hexadienol (3) to obtain (E)-2-isopropyl-5-methyl-2,4-hexadienyl acetate (4). (In the formula, Ac represents an acetyl group.) 【課題】簡便で効率的な酢酸（Ｅ）−２−イソプロピル−５−メチル−２，４−ヘキサジエニルの製造方法を提供する。【解決手段】２−イソプロペニル−５−メチル−４−ヘキセン酸（１）を異性化させて（Ｅ）−２−イソプロピル−５−メチル−２，４−ヘキサジエン酸（２）を得る異性化工程と、得られた（Ｅ）−２−イソプロピル−５−メチル−２，４−ヘキサジエン酸（２）を還元して（Ｅ）−２−イソプロピル−５−メチル−２，４−ヘキサジエノール（３）を得る還元工程と、得られた（Ｅ）−２−イソプロピル−５−メチル−２，４−ヘキサジエノール（３）をアセチル化して酢酸（Ｅ）−２−イソプロピル−５−メチル−２，４−ヘキサジエニル（４）を得るアセチル化工程とを少なくとも含む酢酸（Ｅ）−２−イソプロピル−５−メチル−２，４−ヘキサジエニルの製造方法を提供する。【化１】（式中、Ａｃはアセチル基を示す。）【選択図】なし