Process for preparing 4-isopropylcyclohexylmethanol
    6.
    发明授权
    Process for preparing 4-isopropylcyclohexylmethanol 有权
    制备4-异丙基环己基甲醇的方法

    公开(公告)号:US08889920B2

    公开(公告)日:2014-11-18

    申请号:US13025528

    申请日:2011-02-11

    IPC分类号: C07C43/30 C25B3/02 C07C29/19

    摘要: The present invention relates to a process for preparing 4-isopropylcyclohexylmethanol (IPCHM) from para-cymene. The process for preparing 4-isopropylcyclohexylmethanol (IPCHM) comprises an electrochemical process for preparing a mixture of 4-isopropylbenzaldehyde dimethyl acetal and 4-(1-alkoxy-1-methylethyl)benzaldehyde dimethyl acetal, and intermediates passed through in the process, a hydrolysis step to form the corresponding benzaldehydes and a hydrogenation of this mixture to form 4-isopropylcyclohexylmethanol (IPCHM).

    摘要翻译: 本发明涉及从对甲基异丙基苯制备4-异丙基环己基甲醇(IPCHM)的方法。 制备4-异丙基环己基甲醇(IPCHM)的方法包括用于制备4-异丙基苯甲醛二甲基缩醛和4-(1-烷氧基-1-甲基乙基)苯甲醛二甲基缩醛的混合物的电化学方法和在该方法中通过的中间体,水解 步骤以形成相应的苯甲醛和该混合物的氢化形成4-异丙基环己基甲醇(IPCHM)。

    PROCESS FOR PREPARING 4-ISOPROPYLCYCLOHEXYLMETHANOL
    7.
    发明申请
    PROCESS FOR PREPARING 4-ISOPROPYLCYCLOHEXYLMETHANOL 有权
    制备4-异丙基环己基甲醇的方法

    公开(公告)号:US20110207968A1

    公开(公告)日:2011-08-25

    申请号:US13025528

    申请日:2011-02-11

    IPC分类号: C07C43/30 C25B3/02

    摘要: The present invention relates to a process for preparing 4-isopropylcyclohexylmethanol (IPCHM) from para-cymene. The process for preparing 4-isopropylcyclohexylmethanol (IPCHM) comprises an electrochemical process for preparing a mixture of 4-isopropylbenzaldehyde dimethyl acetal and 4-(1-alkoxy-1-methylethyl)benzaldehyde dimethyl acetal, and intermediates passed through in the process, a hydrolysis step to form the corresponding benzaldehydes and a hydrogenation of this mixture to form 4-isopropylcyclohexylmethanol (IPCHM).

    摘要翻译: 本发明涉及从对甲基异丙基苯制备4-异丙基环己基甲醇(IPCHM)的方法。 制备4-异丙基环己基甲醇(IPCHM)的方法包括用于制备4-异丙基苯甲醛二甲基缩醛和4-(1-烷氧基-1-甲基乙基)苯甲醛二甲基缩醛的混合物的电化学方法和在该方法中通过的中间体,水解 步骤以形成相应的苯甲醛和该混合物的氢化形成4-异丙基环己基甲醇(IPCHM)。

    Process for preparing M- or P-substituted phenylalkanols by alkylation
    10.
    发明授权
    Process for preparing M- or P-substituted phenylalkanols by alkylation 有权
    通过烷基化制备M-或P-取代的苯基链烷醇的方法

    公开(公告)号:US08692025B2

    公开(公告)日:2014-04-08

    申请号:US13503515

    申请日:2010-10-14

    IPC分类号: C07C45/29 C07C29/32

    摘要: The invention relates to a process for the preparation of m- or p-substituted phenylalkanols of the formula (I) in which R1 is bonded to the phenyl ring in the m- or p-position and is C1-C5-alkyl, and R2, R3, R4 and R5, independently of one another, are hydrogen or methyl, wherein an unsubstituted phenylalkanol of the formula (II) in which R2, R3, R4 and R5 have the meanings given under formula (I) is alkylated together with a C1-C5-alkyl halide of the formula (III) R1-Hal  (III), in which R1 has the meaning given under formula (I) and Hal is halogen, in the presence of a Friedel-Crafts catalyst to give an m- or p-alkyl-substituted phenylalkanol of the formula (I), then the reaction mixture is worked-up and the desired m- or p-alkyl-substituted phenylalkanol of the formula (I) is separated off, the other formed by-products are returned to the reaction mixture and these are isomerized in the presence of a Friedel-Crafts catalyst to give the desired m- or p-alkyl-substituted phenylalkanol. From the m- or p-alkyl-substituted phenylalkanols of the formula (I), it is possible to form, by oxidation or dehydrogenation, as products of value, the corresponding aldehydes, which play an interesting role as fragrances and aroma chemicals.

    摘要翻译: 本发明涉及一种制备式(I)的间 - 或对 - 取代的苯烷醇的方法,其中R 1与m-或p-位上的苯环键合并且是C1-C5-烷基,R2 R 3,R 4和R 5彼此独立地为氢或甲基,其中R 2,R 3,R 4和R 5具有式(I)所示含义的式(II)的未取代的苯基烷醇与 其中R 1具有式(I)所示含义,Hal为卤素的式(III)R1-Hal(Ⅲ)的C1-C5烷基卤化物,在Friedel-Crafts催化剂存在下,得到m- 或式(I)的对烷基取代的苯基链烷醇,然后将反应混合物处理并分离所需的式(I)的间 - 或对 - 烷基取代的苯基烷醇,另一个形成的副产物 返回到反应混合物中,并将它们在Friedel-Crafts催化剂存在下异构化,得到所需的间 - 或对 - 烷基取代的苯基 kanol 从式(I)的间 - 或对 - 烷基取代的苯烷醇,可以通过氧化或脱氢形成作为有价值的产物,相应的醛作为香料和香气化学品起着重要的作用。