Process for the preparation of 2,6-xylenol
    2.
    发明授权
    Process for the preparation of 2,6-xylenol 有权
    2,6-二甲苯酚的制备方法

    公开(公告)号:US06593501B2

    公开(公告)日:2003-07-15

    申请号:US09948787

    申请日:2001-09-10

    CPC classification number: C07C37/16 Y02P20/582 C07C39/07

    Abstract: A process for producing an aromatic hydroxyl compound alkylated at the ortho position in high yield by subjecting an aromatic hydroxyl compound and an alkyl alcohol to a gas phase catalytic reaction in the presence of a metal oxide catalyst. The aromatic hydroxyl compound is a mixture of a phenol and ortho cresol, and the amount of ortho cresol in the mixture is 0.6 mole or less per 1 mole of phenol.

    Abstract translation: 通过在金属氧化物催化剂的存在下使芳香族羟基化合物和烷基醇进行气相催化反应,生成以高收率在邻位烷基化的芳香族羟基化合物的方法。 芳族羟基化合物是苯酚和邻甲酚的混合物,混合物中邻甲酚的量相对于每1摩尔酚为0.6摩尔或更少。

    Process for the production of 2,3,5-trimethylhydroquinone diesters
    4.
    发明授权
    Process for the production of 2,3,5-trimethylhydroquinone diesters 失效
    制备2,3,5-三甲基氢醌二酯的方法

    公开(公告)号:US06417409B1

    公开(公告)日:2002-07-09

    申请号:US09502229

    申请日:2000-02-11

    CPC classification number: C07C67/00 Y02P20/582 C07C69/017 C07C69/16

    Abstract: The invention relates to an improved process for the production of 2,3,5-trimethylhydroquinone diesters by rearrangement of 2,6,6-trimethyl-2-cyclohexene-1,4-dione (4-oxoisophorone, ketoisophorone) in the presence of a dissolved, acidic catalyst and an acylating agent, such as for example carboxylic anhydrides or carboxylic acid halides. The 2,3,5-trimethylhydroquinone diester can optionally then be saponified to give free 2,3,5-trimethylhydroquinone (TMHQ), which is a valuable building block in the synthesis of vitamin E.

    Abstract translation: 本发明涉及通过在2,6,6-三甲基-2-环己烯-1,4-二酮(4-氧代异佛尔酮,酮异佛尔酮)的存在下重排来制备2,3,5-三甲基氢醌二酯的改进方法 溶解的酸性催化剂和酰化剂,例如羧酸酐或羧酸卤化物。 可以任选地将2,3,5-三甲基氢醌二酯皂化,得到游离的2,3,5-三甲基氢醌(TMHQ),其是维生素E合成中的有价值的结构单元。

    Method and composition for hydroxylation of aromatic substrates
    5.
    发明授权
    Method and composition for hydroxylation of aromatic substrates 失效
    芳香族底物羟基化的方法和组成

    公开(公告)号:US06232510B1

    公开(公告)日:2001-05-15

    申请号:US09259653

    申请日:1999-02-26

    CPC classification number: C07C37/58 Y02P20/52 C07C39/04

    Abstract: A method and composition are disclosed for the oxidation of aromatic substrates in the presence of oxygen, a catalyst, a proton source, and a non-gaseous reductant. In a preferred embodiment, benzene is oxidized to phenol in the presence of oxygen, a vanadyl catalyst, trifluoroacetic acid as a proton source, and ferrocene as a reductant. The method is economical, safe, and amenable to commercial scale-up.

    Abstract translation: 公开了在氧气,催化剂,质子源和非气态还原剂存在下氧化芳族底物的方法和组合物。 在优选的实施方案中,在氧的存在下,苯的氧被氧化成苯酚,作为质子源的氧钒基催化剂,三氟乙酸和作为还原剂的二茂铁。 该方法是经济,安全和易于商业化的。

    Aniline-derived ligands for the thyroid receptor
    6.
    发明授权
    Aniline-derived ligands for the thyroid receptor 有权
    苯胺衍生的甲状腺受体配体

    公开(公告)号:US06800605B1

    公开(公告)日:2004-10-05

    申请号:US09761050

    申请日:2001-01-16

    Abstract: New thyroid receptor ligands are provided which have the general formula in which: X is —O—, —S—, —CH2—, —CO—, or —NH—; Y is —(CH2)n— where n is an integer from 1 to 5, or cis- or trans-ethylene; R1 is halogen, trifluoromethyl, or alkyl of 1 to 6 carbons or cycloalkyl of 3 to 7 carbons; R2 and R3 are the same or different and are hydrogen, halogen, alkyl of 1 to 4 carbons or cycloalkyl of 3 to 6 carbons, at least one of R2 and R3 being other than hydrogen; R4 is hydrogen or lower alkyl; R5 is hydrogen or lower alkyl; R6 is carboxylic acid, or esters or prodrugs; R7 is hydrogen or an alkanoyl or an aroyl. In addition, a method is provided for preventing, inhibiting or treating a disease associated with metabolism dysfunction or which is dependent upon the expression of a T3 regulated gene, wherein a compound as described above is administered in a therapeutically effective amount. Examples of such diseases associated with metabolism dysfunction or are dependent upon the expression of a T3 regulated gene include obesity, hypercholesterolemia, atherosclerosis, cardiac arrhythmias, depression, osteoporosis, hypothyroidism, goiter, thyroid cancer as well as glaucoma, congestive heart failure and skin disorders.

    Abstract translation: 提供了新的甲状腺受体配体,其具有以下通式:X是-O-,-S-,-CH 2 - , - CO-或-NH-; Y是 - (CH 2)n - ,其中n是 1至5,或顺式或反式 - 亚乙基; R 1为卤素,三氟甲基,或1至6个碳原子的烷基或3至7个碳的环烷基; R 2和R 3相同或不同,为氢,卤素, 至4个碳或3至6个碳的环烷基,R2和R3中的至少一个不是氢; R4是氢或低级烷基; R5是氢或低级烷基; R6是羧酸或酯或前药; R7是氢 或烷酰基或芳酰基。此外,提供了用于预防,抑制或治疗与代谢功能障碍相关的疾病或取决于T3调节基因的表达的方法,其中如上所述的化合物以治疗 有效量。 与代谢功能障碍相关或依赖于T3调节基因的表达的这种疾病的实例包括肥胖症,高胆固醇血症,动脉粥样硬化,心律失常,抑郁症,骨质疏松症,甲状腺功能减退,甲状腺癌,青光眼,充血性心力衰竭和皮肤病 。

    Method and composition for hydroxylation of aromatic substrates
    10.
    发明授权
    Method and composition for hydroxylation of aromatic substrates 有权
    芳香族底物羟基化的方法和组成

    公开(公告)号:US06265622B1

    公开(公告)日:2001-07-24

    申请号:US09259652

    申请日:1999-02-26

    CPC classification number: C07C37/58 C07B41/02 Y02P20/52 C07C39/04

    Abstract: A method and composition are disclosed for the hydroxylation of aromatic substrates in the presence of oxygen, hydrogen, and a catalyst. In a preferred embodiment, benzene is oxidized to phenol in the presence of oxygen, a vanadium catalyst, and hydrogen. The method is economical, safe, and amenable to commercial scale-up.

    Abstract translation: 公开了在氧,氢和催化剂存在下芳族底物羟基化的方法和组合物。 在优选的实施方案中,在氧,钒催化剂和氢的存在下将苯氧化成苯酚。 该方法是经济,安全和易于商业化的。

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