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12 条记录 (耗时 0.011 秒)

    Process for preparing 2-cyclopentenone derivatives
    2.
    发明授权
    Process for preparing 2-cyclopentenone derivatives 失效
    2-环戊烯酮衍生物的制备方法

    公开(公告)号：US4496767A

    公开(公告)日：1985-01-29

    申请号：US543152

    申请日：1983-10-18

    申请人： Masayoshi Minai ,  Tadashi Katsura

    发明人： Masayoshi Minai ,  Tadashi Katsura

    IPC分类号： C07C45/00 ,  C07C45/59 ,  C07C45/61 ,  C07C45/62 ,  C07C45/65 ,  C07C45/66 ,  C07C45/67 ,  C07C49/587 ,  C07C49/597 ,  C07C49/647 ,  C07C49/683 ,  C07C49/703 ,  C07C49/707 ,  C07C49/743 ,  C07C49/747 ,  C07C67/00

    CPC分类号： C07C45/676 ,  C07C45/59 ,  C07C45/62 ,  C07C45/65 ,  C07C45/66

    摘要： A novel process for preparing 2-cyclopentenones of the formula: ##STR1## wherein R.sub.1 is hydrogen, alkyl or alkenyl and R.sub.2 is alkyl, alkenyl, alkynyl, cycloalkyl, aryl or aralkyl, which comprises esterifying a mixture of a 3-hydroxy-4-cyclopentenone of the formula: ##STR2## wherein R.sub.1 and R.sub.2 are each as defined above and a 4-hydroxy-2-cyclopentenone of the formulas: ##STR3## wherein R.sub.1 and R.sub.2 are each as defined above with an aliphatic carboxylic acid to give a mixture of the 4-hydroxy-2-cyclopentenone (III) and the cyclopentenone ester of the formula: ##STR4## wherein R.sub.1 and R.sub.2 are each as defined above and R is hydrogen or C.sub.1 -C.sub.4 alkyl and subjecting the resulting mixture to reduction.

    摘要翻译： 一种制备下式的2-环戊烯酮的新方法：其中R1是氢，烷基或烯基，R2是烷基，烯基，炔基，环烷基，芳基或芳烷基，其包括将3- （II）的羟基-4-环戊烯酮，其中R 1和R 2各自如上所定义，和下式的4-羟基-2-环戊烯酮：其中R 1和R 2各自为 （III）和下式的环戊烯酮的混合物：其中R 1和R 2各自如上所定义，R是氢原子 或C 1 -C 4烷基，并将所得混合物还原。

    Method for purification of cyclopentenolones
    5.
    发明授权
    Method for purification of cyclopentenolones 失效
    环戊烯酮的纯化方法

    公开(公告)号：US4376871A

    公开(公告)日：1983-03-15

    申请号：US372379

    申请日：1982-04-27

    申请人： Fumio Fujita

    发明人： Fumio Fujita

    IPC分类号： C07C49/703 ,  C07C45/00 ,  C07C45/85 ,  C07C67/00

    CPC分类号： C07C45/85

    摘要： Purification of cyclopentenolone such as, for example, 2-propargyl-3-methyl-4-hydroxy-2-cyclopenten-1-one, which is an intermediate to manufacture pyrethroidal insecticides, is made by reacting with calcium chloride to form the cyclopentenolone-calcium chloride complex and then decomposing the complex with water.

    摘要翻译： 通过与氯化钙反应形成环戊烯醇酮，例如2-炔丙基-3-甲基-4-羟基-2-环戊烯-1-酮，其是制备除虫菊酯类杀虫剂的中间体，以形成环戊烯醇酮 - 氯化钙络合物，然后用水分解复合物。

    Preparation of cyclohexane-dione derivatives
    7.
    发明授权
    Preparation of cyclohexane-dione derivatives 失效
    环己酮衍生物的制备

    公开(公告)号：US5118856A

    公开(公告)日：1992-06-02

    申请号：US562445

    申请日：1990-08-02

    申请人： Gernot Reissenweber ,  Winfried Richarz

    发明人： Gernot Reissenweber ,  Winfried Richarz

    IPC分类号： C07B37/10 ,  C07B41/06 ,  C07C45/00 ,  C07C45/45 ,  C07C45/48 ,  C07C45/65 ,  C07C45/67 ,  C07C45/68 ,  C07C49/403 ,  C07C49/613 ,  C07C49/647 ,  C07C49/703 ,  C07C49/713 ,  C07C49/723 ,  C07C49/743 ,  C07C49/747 ,  C07C67/00 ,  C07C67/347 ,  C07C69/757 ,  C07C313/00 ,  C07C323/22 ,  C07C401/00 ,  C07C403/16 ,  C07D213/46 ,  C07D213/50 ,  C07D309/06 ,  C07D309/22 ,  C07D335/02

    CPC分类号： C07C45/676 ,  C07C319/20 ,  C07D213/50 ,  C07D309/06 ,  C07D309/22 ,  C07D335/02 ,  C07C2101/14 ,  C07C2101/16 ,  C07C2101/20 ,  C07C2102/42

    摘要： A process for the preparation of cyclohexanedione derivatives of the general formula I ##STR1## where R.sup.1 is C.sub.2 -C.sub.8 -alkyl, C.sub.2 -C.sub.8 -alkenyl, C.sub.3 -C.sub.12 -cycloalkyl, C.sub.5 -C.sub.12 -cycloalkyl with 0-4 olefinically unsaturated bonds, C.sub.2 -C.sub.8 -alkylthioalkyl, C.sub.6 -C.sub.12 -bicycloalkyl with 0-3 olefinically unsaturated bonds, unsubstituted or substituted aryl or hetaryl, or a heterocyclic radical of 4 to 7 atoms of which not more than 3 may be hetero-atoms chosen from O, S and N, the radical being saturated or olefinically unsaturated, by reacting an .alpha.,.beta.-unsaturated ketone (II) with a dialkyl malonate in the presence of a base to give the alkoxycarbonylcyclohexenolone or its salt (III) ##STR2## and acylation, hydrolysis and decarboxylation of (III), wherein the .alpha.,.beta.-unsaturated ketone (II) is reacted, in the presence of a base, with the dialkyl malonate in a solvent from which the alcohol liberated from the malonate can be distilled off, the alcohol is distilled off, where appropriate as an azeotrope, the salt of the alkoxycarbonylcyclohexenolone is reacted with a carboxylic acid halide and the product, where appropriate after removal of excess acyl halide, is treated with an acylation catalyst, hydrolyzed and decarboxylated.

    摘要翻译： 制备通式I（I）的环己二酮衍生物的方法，其中R 1是C 2 -C 8 - 烷基，C 2 -C 8 - 烯基，C 3 -C 12 - 环烷基，具有0-4烯属的C 5 -C 12 - 环烷基 不饱和键，C 2 -C 8烷硫基烷基，具有0-3烯属不饱和键的C 6 -C 12 - 双环烷基，未取代或取代的芳基或杂芳基，或其中不超过3的4至7个原子的杂环基可以是选择的杂原子 通过在碱存在下使α，β-不饱和酮（II）与丙二酸二烷基酯反应得到烷氧基羰基环己烯醇或其盐，从O，S和N中选择饱和或烯属不饱和基团（III） 和（III）的酰化，水解和脱羧反应，其中α，β-不饱和酮（II）在碱的存在下与丙二酸二烷基酯在可从其中释放出来的丙二酸酯释放的醇的溶剂中反应 关闭，酒精被蒸馏掉，在适当的地方作为azeo 将烷氧基羰基环己烯醇的盐与羧酸卤化物反应，并且在除去过量酰基卤后适当的产物用酰化催化剂处理，水解和脱羧。

    Removal of deleterious odor-forming impurities from hop flavors
    10.
    发明授权
    Removal of deleterious odor-forming impurities from hop flavors 失效
    从啤酒风味中去除有害的形成臭味的杂质

    公开(公告)号：US4778691A

    公开(公告)日：1988-10-18

    申请号：US34917

    申请日：1987-04-03

    申请人： Paul H. Todd, Jr. ,  James A. Guzinski

    发明人： Paul H. Todd, Jr. ,  James A. Guzinski

    IPC分类号： A23L27/10 ,  A23L27/12 ,  C07C49/703 ,  C07C49/743 ,  C07G99/00 ,  C12C20060101 ,  C12C3/00 ,  C12C3/08

    CPC分类号： C12C5/026 ,  C12C3/08 ,  C12C3/10 ,  C12C3/12 ,  C12C9/025

    摘要： A novel method for the removal of hitherto unrecognized undesirable odor-forming impurities from hop flavors, including unreduced alpha and isoalpha acids and reduced alpha and isoalpha acids, by extracting the impurities from these flavors into water at a pH above 4, preferably above 6 or 7, with or without the presence of salt or solvent, and separating the aqueous phase containing the impurities from the purified hop flavor, as well as the important two-phase and salt-containing intermediate products and the final purified hop flavor which is essentially free of such impurities and which purified isoalpha acid or isohumulone will therefore not produce fruity, estery, sour aromas when used to flavor beverages, e.g., beer or ale, are disclosed. A rapid test for the detection of such aromas, involving dissolution of the hop flavor in ethanol at a concentration of one-half percent w/v and allowing the solution to stand for four days, allows accelerated determination of the presence or absence of such aromas and the odor-forming impurities which cause the undesirable odors.

    摘要翻译： 一种新型的方法，通过从pH值高于4，优选高于6的水中将这些香料中的杂质提取到水中，从啤酒花香料（包括未还原的α和异丙酸）和还原的α和异丙醇酸中去除迄今为止未被识别的不希望的气味形成杂质， 7，存在或不存在盐或溶剂，并将含有杂质的水相与纯化的啤酒花味道分离，以及重要的两相和含盐的中间产物和最终纯化的啤酒花味道基本上不含 的这种杂质，并且当用于调味饮料（例如啤酒或啤酒）时，纯化的异α酸或异葎草酮因此不会产生水果，酯，酸味。 用于检测这种香味的快速测试，包括以0.5％w / v的浓度溶解乙醇中的啤酒花风味并使溶液静置4天，可以加速测定这种香味的存在或不存在 和引起不良气味的气味形成杂质。