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    Processes for preparing alpha-necrodyl compounds and processes for preparing gamma-necrodyl compounds
    2.
    发明授权
    Processes for preparing alpha-necrodyl compounds and processes for preparing gamma-necrodyl compounds 有权

    公开(公告)号：US11370741B2

    公开(公告)日：2022-06-28

    申请号：US17378952

    申请日：2021-07-19

    Applicant: Shin-Etsu Chemical Co., Ltd.

    Inventor： Tomohiro Watanabe ,  Takeshi Kinsho ,  Yusuke Nagae

    IPC: C07C67/293 ,  C07C67/327

    Abstract: The present invention provides processes for preparing an α-necrodyl compound of the following general formula (3): wherein R2 represents a monovalent hydrocarbon group having 1 to 9 carbon atoms, the process comprising: subjecting a 3, 5, 5-trimethyl-3-cyclopentene compound of the following general formula (1): wherein R2 is as defined above, and X represents a leaving group, to a nucleophilic substitution reaction with a methylating agent of the following general formula (2): wherein M represents Li, MgZ1, ZnZ1, Cu, CuZ1, or CuLiZ1, and Z1 represents a halogen atom or a methyl group, to form the α-necrodyl compound (3). The present invention further provides processes for preparing γ-necrodyl compounds of the following general formula (4): wherein R2 represents a monovalent hydrocarbon group having 1 to 9 carbon atoms, the process comprising: subjecting the α-necrodyl compound (3) thus obtained to a positional isomerization reaction at the double bond to form the γ-necrodyl compound (4).

    3-ACYLOXYMETHYL-3-BUTENYL CARBOXYLATE COMPOUND AND METHOD FOR PRODUCING 4-ALKYL-3-METHYLENEBUTYL CARBOXYLATE
    5.
    发明申请
    3-ACYLOXYMETHYL-3-BUTENYL CARBOXYLATE COMPOUND AND METHOD FOR PRODUCING 4-ALKYL-3-METHYLENEBUTYL CARBOXYLATE 有权
    3-乙酰甲基-3-丁烯基羧酸酯化合物及其制备方法4-甲基-3-甲基戊酸羧酸酯

    公开(公告)号：US20160185707A1

    公开(公告)日：2016-06-30

    申请号：US14974104

    申请日：2015-12-18

    Applicant: Shin-Etsu Chemical Co., Ltd.

    Inventor： Takeshi Kinsho ,  Naoki Ishibashi ,  Yusuke Nagae

    IPC: C07C67/297 ,  C07C69/02 ,  C07C69/34

    CPC classification number: C07C67/297 ,  C07C67/11 ,  C07C67/293 ,  C07C69/003 ,  C07C69/02 ,  C07C69/28 ,  C07C69/34 ,  C07C69/24

    Abstract: Provided is a simple, selective and efficient method for producing 4-alkyl-3-methylenebutyl carboxylates such as 7-methyl-3-methylene-7-octenyl propionate. More specifically provided is a method for producing a 4-alkyl-3-methylenebutyl carboxylate compound, the method comprising a diacyloxylation step of subjecting a 4-halo-2-halomethyl-1-butene compound (6) to diacyloxylation to obtain a 3-acyloxymethyl-3-butenyl carboxylate compound (3), and a coupling step of subjecting the 3-acyloxymethyl-3-butenyl carboxylate compound (3) to a coupling reaction with an organometallic reagent (4) to obtain the 4-alkyl-3-methylenebutyl carboxylate compound (5).

    Abstract translation: 提供了一种用于制备4-烷基-3-亚甲基丁基羧酸酯如7-甲基-3-亚甲基-7-辛烯基丙酸酯的简单，选择性和有效的方法。 更具体地提供了制备4-烷基-3-亚甲基丁基羧酸酯化合物的方法，该方法包括使4-卤代-2-甲基-1-丁烯化合物（6）进行二酰氧基化得到3- 酰氧基甲基-3-丁烯基羧酸酯化合物（3），以及使3-酰氧基甲基-3-丁烯基羧酸酯化合物（3）与有机金属试剂（4）进行偶联反应的偶联工序，得到4-烷基-3- 亚甲基丁基羧酸酯化合物（5）。

    Method for producing 2-isopropylidene-5-methyl-4-hexenyl butyrate
    6.
    发明授权
    Method for producing 2-isopropylidene-5-methyl-4-hexenyl butyrate 有权
    2-异亚丙基-5-甲基-4-己烯基丁酸酯的制备方法

    公开(公告)号：US09126920B2

    公开(公告)日：2015-09-08

    申请号：US14527239

    申请日：2014-10-29

    Applicant: SHIN-ETSU CHEMICAL CO., LTD.

    Inventor： Takeshi Kinsho ,  Naoki Ishibashi ,  Miyoshi Yamashita ,  Yuki Miyake ,  Akihiro Baba ,  Yusuke Nagae

    IPC: C07C67/08 ,  C07C51/353 ,  C07C51/09

    CPC classification number: C07C51/353 ,  A01N49/00 ,  C07C29/147 ,  C07C51/09 ,  C07C67/14 ,  C07C67/333 ,  C07C69/587 ,  C07C33/02 ,  C07C57/03 ,  C07C69/24

    Abstract: Provided is a simple and efficient method for producing 2-isopropylidene-5-methyl-4-hexenyl butyrate. More specifically, provided is a method for producing 2-isopropylidene-5-methyl-4-hexenyl butyrate, the method including the steps of: isomerizing 2-isopropenyl-5-methyl-4-hexenoic acid ester (1) into 2-isopropylidene-5-methyl-4-hexenoic acid ester (2), reducing thus formed 2-isopropylidene-5-methyl-4-hexenoic acid ester (2) into 2-isopropylidene-5-methyl-4-hexenol (3), and butyrylating thus formed 2-isopropylidene-5-methyl-4-hexenol (3) into 2-isopropylidene-5-methyl-4-hexenyl butyrate (4), wherein R represents a C1-10 hydrocarbon group.

    Abstract translation: 提供了生产2-异亚丙基-5-甲基-4-己烯基丁酸酯的简单有效的方法。 更具体地说，提供了2-异亚丙基-5-甲基-4-己烯基丁酸酯的制造方法，其特征在于，将2-异丙烯基-5-甲基-4-己烯酸酯（1）异构化成2-异丙叉 -5-甲基-4-己烯酸酯（2），将由此形成的2-异亚丙基-5-甲基-4-己烯酸酯（2）还原成2-异亚丙基-5-甲基-4-己烯醇（3），和 将由此形成的2-异亚丙基-5-甲基-4-己烯醇（3）丁酰化成2-异丙叉-5-甲基-4-己烯基丁酸酯（4），其中R表示C1-10烃基。

    PROCESS FOR PREPARING CONJUGATED DIENE COMPOUND UTILIZING INTRAMOLECULAR SIGMATROPIC REARRANGEMENT REACTION
    7.
    发明公开
    PROCESS FOR PREPARING CONJUGATED DIENE COMPOUND UTILIZING INTRAMOLECULAR SIGMATROPIC REARRANGEMENT REACTION 审中-公开

    公开(公告)号：US20240262943A1

    公开(公告)日：2024-08-08

    申请号：US18322680

    申请日：2023-05-24

    Applicant: Shin-Etsu Chemical Co., Ltd.

    Inventor： Yuki Miyake ,  Yusuke Nagae ,  Takeru Watanabe

    IPC: C08F36/04

    CPC classification number: C08F36/04

    Abstract: The present invention relates to A process for preparing a conjugated diene compound, the process comprising: subjecting, to an intramolecular sigmatropic rearrangement reaction, a conjugated diene compound (1) of the following general formula (1), wherein Z represents a halogen atom, a methyl group, a hydroxy group, an acetoxy group, a formyl group, or an acetal, and n and m are, independently of each other, integers of 0 to 14, or a conjugated diene compound (2) of the following general formula (2), wherein Z, n, and m are as defined above, to obtain, respectively, a conjugated diene compound (3) of the following general formula (3), wherein Z is as defined above, and n and m are, independently of each other, integers of 0 to 14, with the proviso that m−1 is an integer of zero or more, or a conjugated diene compound (4) of the following general formula (4), wherein Z is as defined above, and n and m are, independently of each other, integers of 0 to 14, with the proviso that n−1 is an integer of zero or more.

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