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    • 5. 发明授权
    • Method for producing 3,5-dimethyldodecanoic acid; and 4-carboxy-3,5-Dimethyl-3,5-dodecadienoic acid
    • 3,5-二甲基十二烷酸的制备方法 和4-羧基-3,5-二甲基-3,5-二十二碳烯酸
    • US09278899B2
    • 2016-03-08
    • US14713582
    • 2015-05-15
    • Shin-Etsu Chemical Co., Ltd.
    • Akihiro BabaTakeshi KinshoNaoki Ishibashi
    • C07C51/36C07C51/373C07C51/09C07C51/38C07C57/13
    • C07C51/36C07C51/09C07C51/373C07C51/38C07C57/13C07C57/03C07C53/126
    • Provided is a process for 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:
    • 提供了作为加利福尼亚朊病毒的信息素的活性成分的3,5-二甲基十二烷酸的制造方法和作为生产3的中间体的4-羧基-3,5-二甲基-3,5-癸二烯酸 ,5-二甲基十二烷酸。 更具体地说,提供了一种3,5-二甲基十二烷酸的制造方法,其特征在于,包括使3-甲基-2-戊烯-1,5-二酸二酯(1)和2-壬酮(2)进行缩合反应的工序, 随后水解成4-羧基-3,5-二甲基-3,5-二十二碳烯酸(3); 脱羧或脱羧并将4-羧基-3,5-二甲基-3,5-二十二碳烯酸(3)水解成3,5-二甲基-2,4-十二碳二烯酸(4); 并将3,5-二甲基-2,4-十二碳二烯酸(4)氢化成3,5-二甲基十二烷酸(5),如下列方案所示: