Method for the production of menthol
    81.
    发明授权
    Method for the production of menthol 有权
    薄荷醇生产方法

    公开(公告)号:US07709688B2

    公开(公告)日:2010-05-04

    申请号:US11720279

    申请日:2005-11-24

    IPC分类号: C07C29/17 C07C35/12

    摘要: Processes comprising: (a) enantioselectively hydrogenating a staffing material comprising a component selected from geraniol, nerol and mixtures thereof to form optically active citronellol; (b) converting the optically active citronellol to optically active citronellal; (c) cyclizing the optically active citronellal to form a mixture comprising optically active isopulegol; and (d) subjecting the mixture to further processing comprising: (i) separating the optically active isopulegol from the mixture and hydrogenating the separated optically active isopulegol to form optically active menthol; or (ii) hydrogenating the optically active isopulegol in the mixture to form optically active menthol and separating the optically active menthol from the mixture.

    摘要翻译: 方法包括:(a)对对选择性氢化包含选自香叶醇,橙花醇及其混合物的组分的起始材料以形成光学活性香茅醇; (b)将光学活性香茅醇转化为光学活性香茅醛; (c)使光学活性香茅醛环化以形成包含光学活性异ule ol醇的混合物; 和(d)对所述混合物进行进一步处理,包括:(i)从混合物中分离光学活性异胡胶,并将分离的光学活性异胡醇氢化以形成光学活性薄荷醇; 或者(ⅱ)将混合物中的光学活性异ule)醇氢化以形成光学活性薄荷醇,并将该光学活性薄荷醇与混合物分离。

    Diarylphenoxy aluminum compounds
    82.
    发明授权
    Diarylphenoxy aluminum compounds 有权
    二芳基苯氧基铝化合物

    公开(公告)号:US07608742B2

    公开(公告)日:2009-10-27

    申请号:US11817468

    申请日:2006-03-03

    IPC分类号: C07C35/08 C07F5/06

    CPC分类号: C07F5/069

    摘要: The present invention relates to diarylphenoxyaluminum compounds which are obtainable by reacting a bis(diarylphenol) ligand of the formula (I) with an alkylaluminum compound and/or a complex aluminum hydride. The invention moreover relates to the use of such diarylphenoxyaluminum compounds as catalysts.Moreover, the invention relates to a method of producing isopulegol by cyclization of citronellal in the presence of diarylphenoxyaluminum compounds as catalysts.The invention also relates to a method of producing menthol by cyclization of citronellal in the presence of diarylphenoxyaluminum compounds as catalysts and subsequent hydrogenation.

    摘要翻译: 本发明涉及通过使式(I)的双(二芳基苯酚)配体与烷基铝化合物和/或络合氢化铝反应得到的二芳基苯氧基铝化合物。 本发明还涉及这种二芳基苯氧基铝化合物作为催化剂的用途。 此外,本发明涉及通过在二芳基苯氧基铝化合物作为催化剂的存在下环绕香茅醛来生产​​异ule醇的方法。 本发明还涉及在二芳基苯氧基铝化合物作为催化剂和随后的氢化存在下,通过香茅醛环化生产薄荷醇的方法。

    Diarylphenoxy Aluminum Compounds
    84.
    发明申请
    Diarylphenoxy Aluminum Compounds 有权
    二芳基苯氧基铝化合物

    公开(公告)号:US20080167504A1

    公开(公告)日:2008-07-10

    申请号:US11817468

    申请日:2006-03-03

    IPC分类号: C07C39/04 C07C35/12

    CPC分类号: C07F5/069

    摘要: The present invention relates to diarylphenoxyaluminum compounds which are obtainable by reacting a bis(diarylphenol) ligand of the formula (I) with an alkylaluminum compound and/or a complex aluminum hydride.The invention moreover relates to the use of such diarylphenoxyaluminum compounds as catalysts.Moreover, the invention relates to a method of producing isopulegol by cyclization of citronellal in the presence of diarylphenoxyaluminum compounds as catalysts.The invention also relates to a method of producing menthol by cyclization of citronellal in the presence of diarylphenoxyaluminum compounds as catalysts and subsequent hydrogenation.

    摘要翻译: 本发明涉及通过使式(I)的双(二芳基苯酚)配体与烷基铝化合物和/或络合氢化铝反应得到的二芳基苯氧基铝化合物。 本发明还涉及这种二芳基苯氧基铝化合物作为催化剂的用途。 此外,本发明涉及通过在二芳基苯氧基铝化合物作为催化剂的存在下环绕香茅醛来生产​​异ule醇的方法。 本发明还涉及在二芳基苯氧基铝化合物作为催化剂和随后的氢化存在下,通过香茅醛环化生产薄荷醇的方法。

    Nitration of aromatic hydrocarbons
    88.
    发明授权
    Nitration of aromatic hydrocarbons 失效
    芳烃的硝化

    公开(公告)号:US06362381B1

    公开(公告)日:2002-03-26

    申请号:US09946639

    申请日:2001-09-06

    IPC分类号: C07C20500

    摘要: Aromatic hydrocarbons are nitrated by a process in which the aromatic hydrocarbon is reacted in the liquid phase with an oxide of nitrogen selected from NO, N2O3, NO2 and N2O4 and with an oxygen-containing gas stream in the presence of a heterogeneous oxidic catalyst, wherein at least 0.1 mol %, based on the aromatic hydrocarbon, of water is present at the beginning of the reaction.

    摘要翻译: 通过芳烃在液相中与选自NO,N 2 O 3,NO 2和N 2 O 4的氮氧化物和含有异质氧化催化剂的含氧气流反应的方法进行硝化,其中 在反应开始时,存在至少0.1mol%的基于芳烃的水。

    Method for producing 3-methyl 2-butenal acetals
    89.
    发明授权
    Method for producing 3-methyl 2-butenal acetals 失效
    3-甲基2-丁烯醛缩醛的制备方法

    公开(公告)号:US06313322B1

    公开(公告)日:2001-11-06

    申请号:US09463847

    申请日:2000-02-01

    IPC分类号: C07C43303

    CPC分类号: C07C41/56 C07C43/303

    摘要: A process for preparing acetals of the formula I where a) the Rs are, independently of one another, a C1-C20-alkyl or C3-C20-alkenyl radical, or b) the two R radicals together form the members of an unsubstituted or C1-C10-alkyl-substituted 5- to 7-membered cyclic acetal, by reacting 3-methyl-2-butenal in the presence of sulfamic acid, of a N-(C1-C8-alkyl)sulfamic acid or of a N,N-di(C1-C8-alkyl)sulfamic acid as catalyst with: an alcohol of the formula R—OH (IIa), or an orthoester of the formula HC—(OR)3 (III) or a mixture of an alcohol of the formula (IIa) and an orthoester of the formula (III), or an alcohol of the formula HO—(CH2)m—OH (IIb), where m is a number from 2 to 4, and (CH2)m group in the alcohol IIb may be substituted by a C1-C10-alkyl group.

    摘要翻译: 制备式I的缩醛的方法,其中R a彼此独立地为C 1 -C 20烷基或C 3 -C 20 - 烯基,orb),两个R基团一起形成未取代的或C 1 -C 10的成员 - 烷基取代的5-至7-元环状缩醛,在氨基磺酸存在下,使3-甲基-2-丁烯醛,N-(C 1 -C 8 - 烷基)氨基磺酸或N,N-二 (II)的醇或式(II)的醇的混合物或式(IIa)的醇的混合物, 和式(III)的原酸酯,式HO-(CH 2)m -OH(IIb)的醇,其中m为2至4的数,醇IIb中的(CH 2)m基团可以被取代 通过C 1 -C 10 - 烷基。

    Process for the preparation of 2,4-dimethyl-3,5-bisalkoxycarbonylpyrrole
    90.
    发明授权
    Process for the preparation of 2,4-dimethyl-3,5-bisalkoxycarbonylpyrrole 失效
    2,4-二甲基-3,5-双烷氧基羰基吡咯的制备方法

    公开(公告)号:US06258959B1

    公开(公告)日:2001-07-10

    申请号:US09459724

    申请日:1999-12-13

    IPC分类号: C07D207416

    CPC分类号: C07D207/34

    摘要: A process for the preparation of 2,4-dimethyl-3,5-bisalkoxycarbonylpyrrole is described, in which an acetoacetic alkyl ester is nitrosated to give the 2-nitrosoacetoacetic alkyl ester, the nitroso compound is reduced using hydrogen in the presence of a noble metal catalyst to give the amine, and the resulting amino compound is condensed without isolation in the presence of the corresponding non-nitrosated acetoacetic alkyl ester to give the 2,4-dimethyl-3,5-bisalkoxycarbonylpyrrole. The process makes it possible to work under conditions which are milder than in the prior art and to avoid the formation of by-products.

    摘要翻译: 描述了制备2,4-二甲基-3,5-双烷氧羰基吡咯的方法,其中将乙酰乙酸烷基酯亚硝化得到2-亚硝基乙酰乙酸烷基酯,亚硝基化合物在贵金属存在下用氢还原 金属催化剂得到胺,所得的氨基化合物在相应的非亚硝基化乙酰乙酸烷基酯的存在下不分离而冷凝,得到2,4-二甲基-3,5-双烷氧基羰基吡咯。 该方法使得可以在比现有技术更温和的条件下工作并避免副产物的形成。