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12 条记录 (耗时 0.039 秒)

    Preparation of 3-formyltetrahydrothiopyrans
    1.
    发明授权
    Preparation of 3-formyltetrahydrothiopyrans 失效
    3-甲酰基四氢硫代吡喃的制备

    公开(公告)号：US4629799A

    公开(公告)日：1986-12-16

    申请号：US648877

    申请日：1984-09-10

    申请人： Norbert Goetz ,  Dieter Jahn ,  Gernot Reissenweber ,  Heinz Eckhardt

    发明人： Norbert Goetz ,  Dieter Jahn ,  Gernot Reissenweber ,  Heinz Eckhardt

    IPC分类号： B01J23/00 ,  B01J23/40 ,  B01J23/50 ,  C07B61/00 ,  C07D335/02

    CPC分类号： C07D335/02

    摘要： 3-Formyltetrahydrothiopyrans are prepared by hydrogenating a 3-formyl-5,6-dihydro-2H-thiopyran in the presence of a catalyst containing nickel, cobalt, platinum, copper and/or silver; if necessary, the 3-formyl-5,6-dihydro-2H-thiopyrans are prepared by converting bis-(.beta.-formylethyl) sulfides and/or 3-formyl-4-hydroxytetrahydrothiopyrans in the presence of an acidic catalyst, and, if required, these bis-(.beta.-formylethyl) sulfides and/or 3-formyl-4-hydroxytetrahydrothiopyrans are prepared by reacting an acrolein with hydrogen sulfide (a) in the presence of a basic catalyst and of methylene chloride, aromatic hydrocarbons and/or 1,1,2-trichloroethane as solvents, and/or (b) in the presence of a carboxamide.The compounds obtainable by the process according to the invention are useful starting materials for the preparation of dyes, drugs and pesticides.

    摘要翻译： 在含镍，钴，铂，铜和/或银的催化剂存在下，通过氢化3-甲酰基-5,6-二氢-2H-噻喃来制备3-甲酰基四氢硫代吡喃; 如果需要，3-甲酰基-5,6-二氢-2H-噻喃通过在酸性催化剂存在下转化双 - （β-甲酰乙基）硫化物和/或3-甲酰基-4-羟基四氢硫代吡喃来制备，如果 所需的这些双 - （β-甲酰乙基）硫化物和/或3-甲酰基-4-羟基四氢硫代吡喃是通过丙烯醛与硫化氢（a）在碱性催化剂和二氯甲烷，芳烃和/或 1,1,2-三氯乙烷作为溶剂，和/或（b）在甲酰胺存在下。 通过本发明的方法可获得的化合物是用于制备染料，药物和农药的有用的起始材料。

    Preparation of 3-formyl-5,6-dihydro-2H-pyran
    2.
    发明授权
    Preparation of 3-formyl-5,6-dihydro-2H-pyran 失效
    3-甲酰基-5,6-二氢-2H-吡喃的制备

    公开(公告)号：US4532337A

    公开(公告)日：1985-07-30

    申请号：US584334

    申请日：1984-02-28

    申请人： Heinz Eckhardt ,  Klaus Halbritter ,  Norbert Goetz ,  Gerd Heilen

    发明人： Heinz Eckhardt ,  Klaus Halbritter ,  Norbert Goetz ,  Gerd Heilen

    IPC分类号： C07D309/26 ,  C07D309/00

    CPC分类号： C07D309/26

    摘要： 3-Formyl-5,6-dihydro-2H-pyran is prepared by conversion of acrolein in the presence of water, acids and halohydrocarbons of 1 to 6 carbon atoms and 1 to 6 halogen atoms as solvents at from 60.degree. to 150.degree. C. The 3-formyl-5,6-dihydro-2H-pyran obtained by the novel process is a valuable starting material for the preparation of dyes and crop protection agents.

    摘要翻译： 3-甲酰基-5,6-二氢-2H-吡喃是通过在水，酸和1至6个碳原子和1至6个卤素原子的卤代烃作为溶剂在60至150℃的存在下转化丙烯醛来制备的 通过新方法获得的3-甲酰基-5,6-二氢-2H-吡喃是制备染料和作物保护剂的有价值的起始原料。

    Preparation of alpha-substituted upsilon-butyrolactones
    4.
    发明授权
    Preparation of alpha-substituted upsilon-butyrolactones 失效
    制备α-取代的上升 - 丁内酯

    公开(公告)号：US4831166A

    公开(公告)日：1989-05-16

    申请号：US47131

    申请日：1987-05-08

    申请人： Heinz Eckhardt ,  Walter Gramlich ,  Walter Best ,  Klaus Halbritter

    发明人： Heinz Eckhardt ,  Walter Gramlich ,  Walter Best ,  Klaus Halbritter

    IPC分类号： B01J27/10 ,  B01J27/18 ,  B01J27/232 ,  B01J31/02 ,  C07B61/00 ,  C07D307/33 ,  C07D315/00

    CPC分类号： C07D307/33 ,  C07D315/00

    摘要： .gamma.-butyrolactones of the general formula I ##STR1## where R.sup.1 is hydrogen or alkyl of 1 to 4 carbon atoms which may be substituted by lower alkoxy or acyloxy and R.sup.2 is hydrogen or straight-chain or branched alkyl which is unsubstituted or substituted by a functional group or is aryl, are prepared by reacting an alkylene oxide of the general formula II ##STR2## with an acylacetate of the general formla III ##STR3## where R.sup.1 and R.sup.2 have the above meanings and R.sup.3 and R.sup.4 are each alkyl of 1 to 6 carbon atoms or aryl, and R.sup.4 may furthermore be hydrogen, in the presence of a catalyst at elevated temperatures, by a process in which the reaction is carried out in the presence of an alkali metal halide, of an ammonium halide, preferably a quaternary ammonium halide, of a phosphonium halide, of an alkali metal phosphate or of an alkali metal carbonate at from 20.degree. to 200.degree. C. and under from 1 to 50 bar.

    摘要翻译： 通式I（I）的γ-丁内酯，其中R 1是氢或可以被低级烷氧基或酰氧基取代的具有1至4个碳原子的烷基，R 2是氢或未被取代的直链或支链烷基， 被官能团取代或是芳基，通过使通式II（II）的烯化氧与一般形式III（III）的酰基乙酸酯反应制备，其中R 1和R 2具有上述含义， R 3和R 4各自为1至6个碳原子的烷基或芳基，并且R 4还可以在催化剂存在下在升高的温度下通过其中反应在碱金属卤化物 卤化铵，碱金属磷酸盐或碱金属碳酸盐的卤化铵，优选季铵卤化物，在20至200℃和1至50巴之间。

    Preparation of beta-aryl alcohols
    8.
    发明授权
    Preparation of beta-aryl alcohols 失效
    β-芳基醇的制备

    公开(公告)号：US4820882A

    公开(公告)日：1989-04-11

    申请号：US144169

    申请日：1988-01-15

    申请人： Heinz Eckhardt ,  Manfred Eggersdorfer

    发明人： Heinz Eckhardt ,  Manfred Eggersdorfer

    IPC分类号： B01J31/26 ,  B01J31/00 ,  C07B61/00 ,  C07C27/00 ,  C07C29/132 ,  C07C29/36 ,  C07C33/18 ,  C07C33/20 ,  C07C33/34 ,  C07C67/00 ,  C07C31/135 ,  C07C33/22

    CPC分类号： C07C29/36 ,  C07C33/20 ,  C07C33/34 ,  C07C2102/08

    摘要： .beta.-Aryl alcohols for the general forumla I ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are identical or different and each is hydrogen, C.sub.1 -C.sub.20 -alkyl, C.sub.5 -C.sub.7 -cycloalkyl, aryl, C.sub.7 -C.sub.12 -aralkyl or C.sub.7 -C.sub.12 -alkaryl, n is 0, 1, 2, 3 or 4, or where two adjacent R.sup.1 's are linked to form a 5- or 6-membered ring, are prepared by reacting an aromatic of the formula II ##STR2## with an alkylene oxide of the formula III ##STR3## where R.sup.1, R.sup.2 and R.sup.3 have the abovementioned meanings, in the presence of a Friedel-Crafts catalyst, by carrying out the reaction in the presence of a titanium(IV) alcoholate at from -20.degree. to +40.degree. C. in the presence or absence of a solvent.

    摘要翻译： 其中R 1，R 2和R 3相同或不同并且各自为氢，C 1 -C 20 - 烷基，C 5 -C 7 - 环烷基，芳基，C 7 -C 12 - 芳烷基或C 7 -C 12 - 芳烷基， C 12 - 烷芳基，n为0,1,2,3或4，或其中两个相邻的R 1连接以形成5-或6-元环的化合物通过使式II II的芳族化合物与 在Friedel-Crafts催化剂存在下，通过在-20℃的钛（IV）醇存在下进行反应，式III的烯化氧，其中R 1，R 2和R 3具有上述含义， 在存在或不存在溶剂的情况下，温度至+ 40℃。

    Preparation of riboflavin, and 4,5-dimethyl-N-(D)-ribityl-2-(O-alkoxyphenylazo)-aniline intermediates
    9.
    发明授权
    Preparation of riboflavin, and 4,5-dimethyl-N-(D)-ribityl-2-(O-alkoxyphenylazo)-aniline intermediates 失效
    制备核黄素和4,5-二甲基-N-（D） - 二丙基-2-（O-烷氧基苯偶氮） - 苯胺中间体

    公开(公告)号：US4656275A

    公开(公告)日：1987-04-07

    申请号：US730056

    申请日：1985-05-03

    申请人： Hansgeorg Ernst ,  Heinz Eckhardt ,  Joachim Paust

    发明人： Hansgeorg Ernst ,  Heinz Eckhardt ,  Joachim Paust

    IPC分类号： C07C67/00 ,  C07C241/00 ,  C07C245/08 ,  C07D475/14 ,  C07C107/06

    CPC分类号： C07D475/14

    摘要： An improved process for the preparation of riboflavin by condensation of a 4,5-dimethyl-N-(D)-ribityl-2-phenylazoaniline derivative with barbituric acid in the presence of an acidic condensing agent in an organic solvent, wherein a 4,5-dimethyl-N-(D)-ribityl-2-(o-alkoxyphenylazo)-aniline of the formula IIa ##STR1## where R is alkyl of 1 to 4 carbon atoms, in particular methyl, is reacted with barbituric acid, as well as the novel intermediates of the formula IIa.

    摘要翻译： 一种改进的制备核黄素的方法，其通过在酸性缩合剂存在下，在有机溶剂中使4,5-二甲基-N-（D） - 间苯基] -2-苯基偶氮苯胺衍生物与巴比妥酸缩合， 其中R是1至4个碳原子的烷基，特别是甲基的式IIa的（R） - （2-（O-）烷基-2-（邻 - 烷氧基苯基偶氮） - 苯胺其中R是与巴比妥酸反应， 以及式IIa的新型中间体。