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417 条记录 (耗时 0.023 秒)

    Process for the preparation of alkenylated dicarboxylic acid lactones
    51.
    发明授权
    Process for the preparation of alkenylated dicarboxylic acid lactones 失效
    烯基化二羧酸内酯的制备方法

    公开(公告)号：US4153616A

    公开(公告)日：1979-05-08

    申请号：US735871

    申请日：1976-10-26

    申请人： Justin C. Powell ,  William M. Cummings

    发明人： Justin C. Powell ,  William M. Cummings

    IPC分类号： C07D315/00 ,  C07D309/30 ,  C07D307/32

    CPC分类号： C07D315/00

    摘要： An improvement in a process for the preparation of alkenyldicarboxylic acid lactones by alkenylation of maleic anhydride or other C.sub.4 H.sub.2 O.sub.3, C.sub.5 H.sub.4 O.sub.3, or C.sub.6 H.sub.6 O.sub.3 alkendioic anhydrides or their corresponding acids wherein the unsaturation is conjugated with at least one carboxy group with olefins having a molecular weight from about 200 to 3000 whereby alkenyldicarboxylic acids or its anhydrides is formed together with a sludge and is thereafter subjected to lactonization or hydrolysis-lactonization in the presence of a catalyst and in the presence of at least a portion of the sludge.

    摘要翻译： 通过烯丙基化马来酸酐或其它C 4 H 2 O 3，C 5 H 4 O 3或C 6 H 6 O 3烷氧基酸酐或其相应的酸，其中不饱和键与至少一个羧基与分子量约为的烯烃共轭而制备烯基二羧酸内酯的方法的改进 200〜3000，由此与淤渣一起形成链烯基二羧酸或其酸酐，然后在催化剂的存在下和在至少一部分污泥的存在下进行内酯化或水解 - 内酯化。

    Process for preparing 2-acyl-5-substituted thiatetrahydrofuran-4-ones
    52.
    发明授权
    Process for preparing 2-acyl-5-substituted thiatetrahydrofuran-4-ones 失效
    2-酰基-5-取代的四氢呋喃-4-酮的制备方法

    公开(公告)号：US4138413A

    公开(公告)日：1979-02-06

    申请号：US887631

    申请日：1978-03-17

    申请人： Braja D. Mookherjee ,  William J. Evers ,  Alfred E. Goossens

    发明人： Braja D. Mookherjee ,  William J. Evers ,  Alfred E. Goossens

    IPC分类号： A24B15/40 ,  C07D307/32 ,  C07D307/64 ,  C11B9/00

    CPC分类号： C07D307/32 ,  A24B15/406 ,  C07D307/64 ,  C11B9/0076

    摘要： Described are 2-acyl-5-substituted thiatetrahydrofuran-4-ones having the generic structure: ##STR1## wherein R.sub.1, R.sub.2, R.sub.1 ' and R.sub.2 ' are the same or different and each represents hydrogen or methyl and wherein R.sub.3 represents one of C.sub.1 -C.sub.9 alkyl, benzyl, phenyl, substituted or unsubstituted allyl having the structure: ##STR2## substituted or unsubstituted 3-furyl having the structure: ##STR3## (wherein R.sub.4 and R.sub.8 are the same or different and each represents hydrogen or methyl) hydroxy alkyl, oxoalkyl, hydroxycycloalkyl or oxocycloalkyl having the structure: ##STR4## (wherein R.sub.5 and R.sub.6, taken separately, represent hydrogen or C.sub.1 -C.sub.3 alkyl or R.sub.5 and R.sub.6, taken together, complete a cycloalkyl group and wherein Q is one of the moieties: ##STR5## prepared according to the process of dimerizing one or more alpha, beta-alkane dione(s) to form one or more alpha, beta-alkane dione dimer(s) having the structure: ##STR6## and reacting the said alkane dione dimer(s) in acidic medium and in the presence of a solvent with a mercaptan, having the structure:R.sub.3 SHthe 2-acyl-5-substituted thiatetrahydrofuran-4-ones of our invention have organoleptic properties which make them useful for augmenting or enhancing the aroma or flavor of foodstuffs, tobaccos and the aroma of perfumes and perfumed articles.

    摘要翻译： 描述了具有以下通用结构的2-酰基-5-取代的硫代四氢呋喃-4-酮：其中R 1，R 2，R 1'和R 2'相同或不同，各自表示氢或甲基，并且其中R 3表示C1 -C9烷基，苄基，苯基，具有以下结构的取代或未取代的烯丙基：具有以下结构的取代或未取代的3-呋喃基：其中R 4和R 8相同或不同，各自表示氢或甲基）羟基 烷基，氧代烷基，羟基环烷基或氧代环烷基，其结构为：其中R 5和R 6分别代表氢或C 1 -C 3烷基或R 5和R 6一起形成环烷基，其中Q是部分之一 ：根据使一种或多种α，β-烷烃二酮二聚形成一种或多种具有以下结构的α，β-烷烃二酮二聚体的方法制备：＆lt; IMAGE＆gt;并使所述烷烃 二酸二聚体在酸性介质中并在溶剂存在下进行 具有硫醇，具有以下结构：

    5-Iodo-6-oxo-3-(2'-arylmethoxy-1'-hydroxyethyl)-4-hydroxy-hexanoic acid, .gamma.-lactone dialkyl acetals
    53.
    发明授权
    5-Iodo-6-oxo-3-(2'-arylmethoxy-1'-hydroxyethyl)-4-hydroxy-hexanoic acid, .gamma.-lactone dialkyl acetals 失效
    （2- {40-芳基甲氧基-1 {40-羟乙基）-4-羟基 - 己酸，{65-内酯二烷基缩醛

    公开(公告)号：US4094883A

    公开(公告)日：1978-06-13

    申请号：US784177

    申请日：1977-04-04

    申请人： Robert C. Kelly

    发明人： Robert C. Kelly

    IPC分类号： C07D309/22 ,  C07D493/02 ,  C07D493/04 ,  C07D307/32

    CPC分类号： C07D309/22 ,  C07D307/33 ,  C07D493/02 ,  C07D493/04

    摘要： The present specification provides novel intermediates and novel processes for the synthesis of Thromboxane B.sub.2 (11a-homo-11a-oxa-PGF.sub.2.alpha.), its 15-epimer, and various carboxy derivatives thereof. In particular, there are disclosed various bicyclic tetrahydrofuran-containing lactones useful in the above processes, and corresponding acyclic lactones.

    摘要翻译： 本说明书提供了用于合成血栓烷B2（11a-homo-11a-oxa-PGF2α），其15-差向异构体及其各种羧基衍生物的新型中间体和新方法。 特别地，公开了可用于上述方法的各种双环四氢呋喃内酯，以及相应的无环内酯。

    Disinfectant furans
    59.
    发明授权
    Disinfectant furans 失效
    消毒呋喃

    公开(公告)号：US4004024A

    公开(公告)日：1977-01-18

    申请号：US593558

    申请日：1975-07-07

    申请人： Heinz Eggensperger ,  Wolfgang Beilfuss ,  Helmut Hermann Ehlers

    发明人： Heinz Eggensperger ,  Wolfgang Beilfuss ,  Helmut Hermann Ehlers

    IPC分类号： A01N43/08 ,  C07D307/02 ,  C07D307/20 ,  C07D307/32 ,  C07D307/33 ,  A61K31/34

    CPC分类号： C07D307/32 ,  C07D307/20

    摘要： There is disclosed a method for controlling bacteria, fungi and spores which comprises applying thereto a bactericidally, fungicidally and sporicidally effective amount of a furan selected from 2-(R.sub.1 O)-5-(R.sub.2 O)-2,5-dihydrofuran and 2-(R.sub.1 O)-5-(R.sub.2 O)-tetrahydrofuran or mixtures thereof; a process for preparing a 2,5-bis(R.sub.1 O)-2,5-tetrahydrofuran and 2,5-bis(R.sub.1 O)-tetrahydrofuran; and novel 2,5-bis(benzyloxy)tetrahydrofuran.

    摘要翻译： 公开了一种用于控制细菌，真菌和孢子的方法，其包括向其施用杀菌，杀真菌和孢子有效量的选自2-（R 1 O）-5-（R 20）-2,5-二氢呋喃和2-（ R1O）-5-（R2O） - 四氢呋喃或其混合物; 制备2,5-二（R1O）-2,5-四氢呋喃和2,5-双（R1O） - 四氢呋喃的方法; 和新的2,5-双（苄氧基）四氢呋喃。

    Process for the manufacture of polylactones derived from poly-.alpha.-hydroxyacrylic acids
    60.
    发明授权
    Process for the manufacture of polylactones derived from poly-.alpha.-hydroxyacrylic acids 失效
    用于制备衍生自聚{（6-羟基丙烯酸）的聚内酯的方法

    公开(公告)号：US3984439A

    公开(公告)日：1976-10-05

    申请号：US489720

    申请日：1974-07-18

    申请人： Noel Vanlautem ,  Julien Mulders

    发明人： Noel Vanlautem ,  Julien Mulders

    IPC分类号： C08F8/00 ,  C07C51/00 ,  C07C51/377 ,  C07C57/54 ,  C07C67/00 ,  C08F8/16 ,  C08F20/00 ,  C08F20/02 ,  C08F120/06 ,  C07D307/32

    CPC分类号： C08F120/06 ,  C08F8/16

    摘要： Process for the manufacture of polylactones derived from poly-.alpha.-hydroxyacrylic acids comprises heating a liquid aqueous solution of .alpha., .beta.-dichloropropionic acid to a temperature above 100.degree.C to convert the .alpha.,.beta.-dichloropropionic acid to the corresponding .alpha.-chloroacrylic acid and polymerizing the .alpha.-chloroacrylic acid in the aqueous solution in the presence of a polymerization catalyst to polymerize, hydrolyze and lactonize the .alpha.-chloroacrylic acid.The products obtained can be used as intermediates for the synthesis of salts of poly-.alpha.-hydroxyacrylic acids.

    摘要翻译： 用于制备衍生自聚-α-羟基丙烯酸的聚内酯的方法包括将α，β-二氯丙酸的液体水溶液加热至100℃以上以将α，β-二氯丙酸转化为相应的α-氯丙烯酸 并在聚合催化剂存在下在水溶液中聚合α-氯代丙烯酸，以聚合，水解和内酯化α-氯代丙烯酸。