Preparation of poloxy-alkylene glycols
    3.
    发明授权
    Preparation of poloxy-alkylene glycols 失效
    烷氧基 - 亚烷基二醇的制备

    公开(公告)号:US5416240A

    公开(公告)日:1995-05-16

    申请号:US24903

    申请日:1993-03-02

    CPC分类号: C08G65/20

    摘要: Polyoxyalkylene glycols are prepared by a process in which tetrahydrofuran is polymerized with a total of not more than 95 mol %, based on the amount of tetrahydrofuran used, of one or more comonomers from the group consisting of the cyclic ethers and acetals in the absence of water and in the presence of a monohydric alcohol or of a monocarboxylic acid with the aid of an anhydrous heteropoly acid catalyst, and the polyoxyalkylene glycol is liberated from the resulting polyoxyalkylene glycol monoethers or polyoxyalkylene glycol monoesters by cleavage of the monoether or monoester bond.

    摘要翻译: 聚氧亚烷基二醇通过以下方法制备,其中四氢呋喃基于所用四氢呋喃的总量不超过95摩尔%,在不存在共聚单体的情况下聚合来自由环醚和缩醛组成的组中的一种或多种共聚单体 水和一元醇或单羧酸存在下,借助于无水杂多酸催化剂,通过裂解单醚或单酯键,从所得聚氧亚烷基二醇单醚或聚氧亚烷基二醇单酯中释放出聚氧亚烷基二醇。

    Preparation of 4-acetals of butene-1,4-dial and novel acetals of
butene-1,4-dial
    4.
    发明授权
    Preparation of 4-acetals of butene-1,4-dial and novel acetals of butene-1,4-dial 失效
    保护1,4-DIAL的4-乙酸丁酯和1,4-DIAL的新型乙烯的制备

    公开(公告)号:US5162552A

    公开(公告)日:1992-11-10

    申请号:US44805

    申请日:1987-04-30

    CPC分类号: C07C45/74 C07D319/06

    摘要: A process for the preparation of 4-acetals of butene-1,4-dial of the formula ##STR1## where R is an alkyl, alkenyl, cycloalkyl or aralkyl radical of 1 to 12 carbon atoms which may contain alkoxy groups, or the two radicals R together form an alkylene or alkenylene radical of 2 to 10 carbon atoms which may contain alkoxy groups, and R.sup.1 is an alkyl, alkenyl or alkynyl radical of 1 to 12 carbon atoms which may be substituted by cycloaliphatic, aromatic or heterocyclic radicals or by hydroxyl, ether, thioether, acyl, alkylamino, carboxyl or carbalkoxy groups, or is an unsubstituted or substituted aryl radical or an alkoxy, alkylthio or acyloxy group, wherein a glyoxal monoacetal of the formula ##STR2## is reacted with an aldehyde of the formulaR.sup.1 --CH.sub.2 --CHO IIIat up to 150.degree. C., and novel acetals of butene-1,4-dial.

    摘要翻译: 制备式Ia的1,4-缩醛的4-缩醛的方法,其中R是可以含有烷氧基的具有1至12个碳原子的烷基,烯基,环烷基或芳烷基,或 两个基团R一起形成可含有烷氧基的2至10个碳原子的亚烷基或亚烯基,R 1是可以被脂环族,芳族或杂环基取代的具有1至12个碳原子的烷基,烯基或炔基,或 通过羟基,醚,硫醚,酰基,烷基氨基,羧基或烷氧基,或者是未取代或取代的芳基或烷氧基,烷硫基或酰氧基,其中式II的乙二醛单缩醛与式 式R1-CH2-CHOⅢ在最高达150℃,新戊烯-1,4-表盘的缩醛。

    Preparation of 2(5H)-furanones
    5.
    发明授权
    Preparation of 2(5H)-furanones 失效
    2(5H) - 呋喃酮的制备

    公开(公告)号:US4853473A

    公开(公告)日:1989-08-01

    申请号:US201050

    申请日:1988-06-01

    IPC分类号: C07D315/00

    CPC分类号: C07D315/00

    摘要: 2(5H)-furanones I ##STR1## where R.sup.1 and R.sup.2 are each hydrogen, C.sub.1 -C.sub.6 -alkyl, C.sub.5 - or C.sub.6 -cycloalkyl, C.sub.7 -C.sub.12 -aralkyl or aryl, are prepared by heating a 3-formylcarboxylate or 3-formylcarboxylic acid II ##STR2## where R.sup.3 is hydrogen, C.sub.1 -C.sub.12 -alkyl, C.sub.5 - or C.sub.6 -cycloalkyl, C.sub.7 -C.sub.12 -aralkyl or aryl, to 100.degree.-450.degree. C. in the presence of an acidic catalyst.

    摘要翻译: 2(5H) - 呋喃酮I(I)其中R1和R2各自为氢,C1-C6烷基,C5-或C6-环烷基,C7-C12-芳烷基或芳基,通过加热3-甲酰基羧酸酯 或其中R 3为氢,C 1 -C 12 - 烷基,C 5 - 或C 6 - 环烷基,C 7 -C 12 - 芳烷基或芳基的3-甲酰基羧酸II(II)在100-450℃存在下, 酸性催化剂。

    Preparation of N-substituted 2-pyrrolidones
    10.
    发明授权
    Preparation of N-substituted 2-pyrrolidones 失效
    N-取代的2-吡咯烷酮的制备

    公开(公告)号:US5434273A

    公开(公告)日:1995-07-18

    申请号:US191649

    申请日:1994-02-04

    CPC分类号: C07D207/267

    摘要: The preparation of N-substituted 2-pyrrolidones (I) by the reaction of maleic acid, fumaric acid, or succinic acid or functional derivatives of these acids (compounds II) with a primary amine (III) or by the reaction of amides or imides derived from II and III under hydrogenating conditions in a synthesis stage followed by isolation, by distillation, of I and other volatile components from the resulting reaction mixture, in which the residues present following distillation are subjected to further hydrogenation treatment and the compound (I) thus formed is isolated by distillation.

    摘要翻译: 通过马来酸,富马酸或琥珀酸或这些酸(化合物II)的官能衍生物与伯胺(III)的反应或通过酰胺或酰亚胺的反应制备N-取代的2-吡咯烷酮(I) 在合成阶段在氢化条件下衍生自II和III,然后通过蒸馏从所得反应混合物中分离I和其它挥发性组分,其中在蒸馏之后存在的残余物进行进一步氢化处理,化合物(I) 由此形成的蒸馏分离。