Purification of .alpha.-bisabolol
    1.
    发明授权
    Purification of .alpha.-bisabolol 失效
    (ALPHA) - 双酚A的纯化

    公开(公告)号:US5132471A

    公开(公告)日:1992-07-21

    申请号:US690617

    申请日:1991-04-24

    IPC分类号: C07C29/80 C07C33/14

    CPC分类号: C07C33/14

    摘要: .alpha.-Bisabolol is purified by distilling a plant extract containing .alpha.-bisabolol under reduced pressure and drawing off the purified .alpha.-bisabolol in the lower half of a distillation column as side product, and feeding in the extract above the side outlet.

    摘要翻译: 通过在减压下蒸馏含有α-对映体的植物提取物,并将作为副产物的蒸馏塔的下半部分中的纯化的α-对映体产物抽出,并将侧面出口上方的提取物进料进行纯化,来纯化α-对照。

    Preparation of alkyl-substituted cinnamaldehydes
    4.
    发明授权
    Preparation of alkyl-substituted cinnamaldehydes 失效
    烷基取代肉桂醛的制备

    公开(公告)号:US4996365A

    公开(公告)日:1991-02-26

    申请号:US401241

    申请日:1989-08-31

    IPC分类号: C07C45/51 C07C47/232

    CPC分类号: C07C45/512 C07C47/232

    摘要: Alkyl-substituted cinnamaldehydes of the formula I ##STR1## where one or more of R.sup.1 , R.sup.2 and R.sup.3 is alkyl of from 1 to 8 carbon atoms, preferably of from 1 to 4 carbon atoms, and non-alkyl R.sup.1, R.sup.2 and R.sup.3 are each hydrogen, which comprises heating acetylene alcohols of the general formula II ##STR2## where R.sup.1, R.sup.2 and R.sup.3 are each as defined above, in the presence of from 55 to 98% strength aqueous formic acid.

    摘要翻译: 其中R1,R2和R3中的一个或多个为1至8个碳原子,优选1至4个碳原子的烷基和非烷基R 1,R 2和R 3的烷基取代的肉桂醛为式 每个氢包括在55至98%强度的水性甲酸的存在下加热通式II“IMAGE”的乙炔醇,其中R 1,R 2和R 3各自如上所定义。

    Preparation of alkylated dodechydronaphto[2,1-b]furans
    6.
    发明授权
    Preparation of alkylated dodechydronaphto[2,1-b]furans 失效
    制备烷基化的dodechydronaphto [2,1-b]呋喃

    公开(公告)号:US4918205A

    公开(公告)日:1990-04-17

    申请号:US250077

    申请日:1988-09-28

    CPC分类号: C07D307/92 C11B9/0076

    摘要: Alkylated dodecahydronaphtho[2,1-b]furans of the general formula I ##STR1## where R.sup.1 and R.sup.2 are identical and each is hydrogen or methyl are prepared by reacting alkylated 2-hydroxydecahydronaphthalene-1-ethanol of the formula II ##STR2## where R.sup.1 and R.sup.2 are as defined above, with a sulfonyl chloride in the presence of basic catalysts by performing the cyclization in the presence of concentrated aqueous alkali metal hydroxides and a phase transfer catalyst, preferably a tetra-substituted ammonium or phosphonium salt, the sulfonyl chloride used preferably comprising a sulfonyl chloride of the general formula IIIR.sub.3 -SO.sub.2 Clwhere R.sup.3 is C.sub.1 -C.sub.3 -alkyl or phenyl which may be substituted in the para position by methyl, chlorine, bromine or nitro.

    摘要翻译: 通式Ⅰ的烷基化十​​二氢萘并[2,1-b]呋喃,其中R 1和R 2相同,各自为氢或甲基,是通过使式II的烷基化的2-羟基十氢化萘-1-乙醇 在碱性催化剂的存在下,通过在浓碱碱金属氢氧化物和相转移催化剂,优选四取代的铵或相互转移的催化剂存在下进行环化,其中R 1和R 2如上定义,与磺酰氯反应, 所用的磺酰氯优选包含通式IIIR 3 -SO 2 Cl的磺酰氯,其中R 3是C 1 -C 3 - 烷基或可以在对位被甲基,氯,溴或硝基取代的苯基。