PROCESS FOR PREPARING CONJUGATED DIENE COMPOUND UTILIZING INTRAMOLECULAR SIGMATROPIC REARRANGEMENT REACTION

    公开(公告)号:US20240262943A1

    公开(公告)日:2024-08-08

    申请号:US18322680

    申请日:2023-05-24

    IPC分类号: C08F36/04

    CPC分类号: C08F36/04

    摘要: 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.

    Process for preparing a 3,7-dimethylalkane compound

    公开(公告)号:US11685703B2

    公开(公告)日:2023-06-27

    申请号:US18058316

    申请日:2022-11-23

    IPC分类号: C07C5/44

    CPC分类号: C07C5/44

    摘要: The present invention relates to a process for preparing a 3,7-dimethylalkane compound (3): wherein n is 5 or 6, the process comprising: subjecting a nucleophilic reagent, 2,6-dimethyloctyl compound (1): wherein M1 represents Li, Mg Z1, CuZ1, or CuLiZ1, wherein Z1 represents a halogen atom or a 2,6-dimethyloctyl group, to a coupling reaction with an electrophilic alkyl reagent (2): wherein X1 represents a halogen atom or a p-toluenesulfonate group, and “n” is as defined above, to form the 3,7-dimethylalkane compound (3).

    PROCESS FOR PREPARING A 3,7-DIMETHYLALKANE COMPOUND

    公开(公告)号:US20230159412A1

    公开(公告)日:2023-05-25

    申请号:US18058316

    申请日:2022-11-23

    IPC分类号: C07C5/44

    CPC分类号: C07C5/44

    摘要: The present invention relates to a process for preparing a 3,7-dimethylalkane compound (3): wherein n is 5 or 6, the process comprising: subjecting a nucleophilic reagent, 2,6-dimethyloctyl compound (1): wherein M1 represents Li, Mg Z1, CuZ1, or CuLiZ1, wherein Z1 represents a halogen atom or a 2,6-dimethyloctyl group, to a coupling reaction with an electrophilic alkyl reagent (2): wherein X1 represents a halogen atom or a p-toluenesulfonate group, and “n” is as defined above, to form the 3,7-dimethylalkane compound (3).

    PROCESS FOR PREPARING 4-PENTEN-2-YNAL

    公开(公告)号:US20210061745A1

    公开(公告)日:2021-03-04

    申请号:US17010236

    申请日:2020-09-02

    IPC分类号: C07C45/42

    摘要: A process for preparing 4-penten-2-ynal of the following formula (2): CH2═CHC≡CCHO  (2) the process comprising a step of hydrolyzing a 5,5-dialkoxy-1-penten-3-yne compound of the following general formula (1): CH2═CHC≡CCH(OR1)(OR2)  (1) wherein R1 and R2 represent, independently of each other, a monovalent hydrocarbon group having 1 to 15 carbon atoms, preferably 1 to 8, more preferably 1 to 4, or R1 and R2 may be bonded to each other to form a divalent hydrocarbon group, R1-R2, having from 2 to 10 carbon atoms, to obtain 4-penten-2-ynal (2).

    Processes for preparing 4-methyl-5-nonanone and 4-methyl-5-nonanol

    公开(公告)号:US10882806B2

    公开(公告)日:2021-01-05

    申请号:US16722138

    申请日:2019-12-20

    摘要: The present invention provides a process for preparing 4-methyl-5-nonanone of the following formula (3), the process comprising at least a step of subjecting pentanoic anhydride of the following formula (1) and a 2-pentyl nucleophilic reagent of the following general formula (2), in which M represents Li, MgZ1, or ZnZ1, wherein Z1 represents a halogen atom or a 2-pentyl group, to a nucleophilic substitution reaction to produce 4-methyl-5-nonanone (3), as well as a process for preparing 4-methyl-5-nonanol of the following formula (7), the process comprising at least steps of preparing 4-methyl-5-nonanone and subjecting the obtained 4-methyl-5-nonanone and a reducing agent to a reduction reaction to produce 4-methyl-5-nonanol (7).

    Method for producing chlorohydrocarbon having conjugated double bonds

    公开(公告)号:US09845273B2

    公开(公告)日:2017-12-19

    申请号:US14189373

    申请日:2014-02-25

    IPC分类号: C07C17/16 C07C17/07

    CPC分类号: C07C17/07 C07C17/16 C07C21/04

    摘要: Provided is a method for producing a chlorohydrocarbon having conjugated double bonds by stereoselectively chlorinating an alcohol having conjugated double bonds. More specifically, provided is a method for producing a chlorohydrocarbon having conjugated double bonds, the method including a step of chlorinating an alcohol having conjugated double bonds with a chlorinating agent in a solvent in the presence of a base and in the absence of metal salt for chlorination of the alcohol, and the alcohol being represented by the formula (1): RCH═CHCH═CH—Z—OH  (1) wherein R represents a hydrogen atom or a linear, branched or cyclic C1-17 monovalent hydrocarbon group which may have at least one double bond or at least one triple bond; and Z represents a linear, branched or cyclic C1-17 divalent hydrocarbon group which may have at least one double bond or at least one triple bond.