Preparation of 2(5H)-furanones
    21.
    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。

    Process for the preparation of an aliphatic, cycloaliphatic, and/or
aliphatic-cycloaliphatic di- and/or polyurethane
    26.
    发明授权
    Process for the preparation of an aliphatic, cycloaliphatic, and/or aliphatic-cycloaliphatic di- and/or polyurethane 失效
    用于制备脂族,脂环族和/或脂族 - 脂环族二 - 和/或聚氨酯的方法

    公开(公告)号:US4497963A

    公开(公告)日:1985-02-05

    申请号:US135259

    申请日:1980-03-31

    摘要: A process for the preparation of an aliphatic, cyclo-aliphatic, and/or aliphatic-cycloaliphatic di- and/or polyurethane comprising the steps ofA. reacting a primary aliphatic, cycloaliphatic, and/or aliphatic-cycloaliphatic di- and/or polyamine with a carbamate in the presence of alcohol at temperatures of 160.degree. C. to 300.degree. C., andB. separating the ammonia and other by-products from the aliphatic, cycloaliphatic, and/or aliphatic-cycloaliphatic di- and/or polyurethane.One or more catalysts may be added to the reactants to increase the reaction rate. The aliphatic, cycloaliphatic, and/or aliphatic-cycloaliphatic di- and/or polyurethanes produced are valuable end and intermediate products. They can be transferred into the corresponding isocyanates which can then be used for the preparation of polyurethanes.

    摘要翻译: 一种制备脂族,环脂族和/或脂族 - 脂环族二 - 和/或聚氨酯的方法,包括以下步骤:A.使脂族,脂环族和/或脂族 - 脂环族二 - 和/或多胺 在160℃至300℃的温度下在醇存在下与氨基甲酸酯反应,并将氨和其它副产物与脂族,脂环族和/或脂族 - 脂环族二 - 和/或聚氨酯 。 可以向反应物中加入一种或多种催化剂以提高反应速率。 生产的脂族,脂环族和/或脂族 - 脂环族二 - 和/或聚氨酯是有价值的终端和中间产品。 它们可以转移到相应的异氰酸酯中,然后可以将其用于制备聚氨酯。

    Preparation of 1-alkenyl isocyanates
    27.
    发明授权
    Preparation of 1-alkenyl isocyanates 失效
    1-链烯基异氰酸酯的制备

    公开(公告)号:US4459236A

    公开(公告)日:1984-07-10

    申请号:US329126

    申请日:1981-12-09

    CPC分类号: C07C263/04 Y02P20/582

    摘要: 1-Alkenyl isocyanates are prepared by reacting aldehydes with carbamates to give N-(1-alkenyl)-carbamates and splitting these compounds at elevated temperatures. The 1,2-unsaturated isocyanates obtained are valuable starting materials for the preparation of pest control agents, dyes, drugs, textile water repellents, detergents, plastics, bleaches and adhesives, since they possess an activated double bond or an activated .alpha.-carbon atom, in addition to a reactive isocyanate group.

    摘要翻译: 通过使醛与氨基甲酸酯反应制备1-烯基异氰酸酯,得到N-(1-链烯基) - 氨基甲酸酯,并在升高的温度下分裂这些化合物。 获得的1,2-不饱和异氰酸酯是制备害虫控制剂,染料,药物,纺织品防水剂,洗涤剂,塑料,漂白剂和粘合剂的有价值的起始原料,因为它们具有活化的双键或活化的α-碳原子 ,除了活性异氰酸酯基团外。

    Preparation of alpha-alkylacroleins
    28.
    发明授权
    Preparation of alpha-alkylacroleins 失效
    α-烷基丙烯醛的制备

    公开(公告)号:US4408079A

    公开(公告)日:1983-10-04

    申请号:US339505

    申请日:1982-01-15

    CPC分类号: C07C45/75

    摘要: .alpha.-Alkylacroleins are prepared by reacting an alkanal with formaldehyde and a secondary amine in the presence of a carboxylic, dicarboxylic or polycarboxylic acid in certain molar ratios within a pH range of from 2.5 to 7 and at from 0.degree. to 150.degree. C.The .alpha.-alkylacroleins which can be prepared by the process described are valuable starting materials for dyes, drugs and pest control agents.

    摘要翻译: 在一定摩尔比的羧酸,二羧酸或多元羧酸的存在下,在2.5至7和0至150℃的pH范围内,使烷醛与甲醛和仲胺反应制备α-烷基丙烯醛。 可以通过所述方法制备的α-烷基丙烯醛是用于染料,药物和害虫控制剂的有价值的起始材料。

    Preparation of propanediols using a copper-and zinc containing
hydrogenation catalyst
    29.
    发明授权
    Preparation of propanediols using a copper-and zinc containing hydrogenation catalyst 失效
    使用含铜和锌的氢化催化剂制备丙二醇

    公开(公告)号:US4393251A

    公开(公告)日:1983-07-12

    申请号:US347380

    申请日:1982-02-10

    摘要: Hydrogenation catalysts which are prepared from mixed crystals of copper-zinc compounds, obtained by precipitation, of the formulaCu.sub.1.5-3 Zn.sub.1-2.5 (CO.sub.3).sub.1-2 (OH).sub.4-6.(H.sub.2 O).sub.0-1by decomposition at 200.degree.-500.degree. C., and are used for the catalytic preparation of propanediols of the formula ##STR1## where the R's may be identical or different and each is an aliphatic, araliphatic or aromatic radical, or the two R's together with the adjacent carbon atom are members of an alicyclic ring, by hydrogenating hydroxypropionaldehydes of the formula ##STR2## where R has the above meanings, and to processes for the preparation of propanediols, using such catalysts. The propane-1,3-diols obtainable by the novel process are valuable starting materials for the preparation of lubricants, plastics, surface coatings and synthetic resins, for example of polyesters derived from the propanediols.

    摘要翻译: 由通过沉淀得到的铜 - 锌化合物的混合晶体制备的氢化催化剂,其通式为Cu1.5-3Zn1-2.5(CO3)1-2(OH)4-6。(H2O) 200℃-500℃,并用于催化制备式(I)的丙二醇,其中R可以相同或不同,并且各自为脂族,芳脂族或芳族基团,或两个R与 相邻的碳原子是脂环的成员,通过氢化具有上述含义的式II的羟基丙醛,以及使用这种催化剂制备丙二醇的方法。 通过新方法获得的丙烷-1,3-二醇是用于制备润滑剂,塑料,表面涂层和合成树脂的有价值的起始材料,例如衍生自丙二醇的聚酯。