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    • 55. 发明授权
    • Preparation of 2-substituted but-2-ene-1,4-dial-4-acetals and novel
hemiacetals of glyoxal monoacetals
    • 2-取代的丁-2-烯-1,4-表面-4-缩醛的制备和乙二醛单缩醛的新半缩醛
    • US5576449A
    • 1996-11-19
    • US314955
    • 1994-09-29
    • J urgen FrankJohann-Peter MelderFranz MergerTom Witzel
    • J urgen FrankJohann-Peter MelderFranz MergerTom Witzel
    • C07D319/06
    • C07D319/06
    • The preparation of 2-substituted but-2-ene-1,4-dial-4-acetals of the formula I ##STR1## in which the substituents R.sup.1 to R.sup.4 stand for hydrogen or C.sub.1 -C.sub.6 aliphatic radicals, and R.sup.2 and R.sup.3 or R.sup.1 and R.sup.2 are in each case common members of an aliphatic 4-membered to 7-membered ring, which can contain a hetero atom, and R.sup.5 denotes an alkyl, alkenyl, or alkynyl radical having from 1 to 12 C atoms, which can be substituted by cycloaliphatic, aromatic or heterocyclic radicals or by hydroxy, ether, thioether, acyl, alkylamino, carboxy, or carbalkoxy groups, an optionally substituted aryl radical or an alkoxy, alkylthio, or acyloxy group, whereina) glyoxal is caused to react with a 1,3-propanediol of the formula II ##STR2## in aqueous solution in the presence of an acid to form a monoacetal of the formula III ##STR3## is neutralized, and if necessary the components more readily volatile than the monoacetal III are distilled off,b) the monoacetal III obtained is caused to react with an aldehyde R.sup.5 CH.sub.2 --CHO in the presence of from 0.01 to 10 mol %, based on glyoxal, of a catalyst mixture of a secondary amine and an acid to form an aldol of the formula IV ##STR4## the components which are more volatile than the aldol IV being distilled off if necessary, andc) the aldol IV is dehydrated in the presence of a water-eliminating agent to form the product I,and novel hemiacetals of glyoxal monoacetals.
    • 制备其中取代基R 1至R 4代表氢或C 1 -C 6脂族基团的式I I 2的2-取代的丁-2-烯-1,4-二甲氧基-4-缩醛,以及R 2和R 3 或者R 1和R 2各自为可以含有杂原子的脂肪族4元〜7元环的共同成员,R 5表示具有1〜12个C原子的烷基,烯基或炔基,其可以 被脂环族,芳族或杂环基取代,或被羟基,醚,硫醚,酰基,烷基氨基,羧基或烷氧基取代,任选取代的芳基或烷氧基,烷硫基或酰氧基,其中a)使乙二醛反应 与式II II的1,3-丙二醇在酸存在下在水溶液中形成式III的单缩醛中和,如果需要,组分比单缩醛更容易挥发 III蒸馏掉,b)使获得的单缩醛III与醛反应 在基于乙二醛的0.01至10mol%的存在下,将仲胺和酸的催化剂混合物形成式IV的醛醇,得到更具挥发性的组分 如果需要,醛醇IV被蒸馏,和c)醛醇IV在除水剂存在下脱水以形成产物I,和乙二醛单缩醛的新型半缩醛。
    • 59. 发明授权
    • Selective preparation of linear pentane-1,5-diamines in increased yields
    • 线性戊烷-1,5-二胺的选择性制备
    • US5344983A
    • 1994-09-06
    • US936084
    • 1992-08-26
    • Tom WitzelEberhard FuchsFranz MergerClaus-Ulrich Priester
    • Tom WitzelEberhard FuchsFranz MergerClaus-Ulrich Priester
    • B01J23/40B01J23/755B01J27/10B01J27/125B01J27/18C07B61/00C07C209/48C07C211/09C07C209/00
    • C07C209/48
    • Process for preparing a pentane-1,5-diamine of the formula ##STR1## where R.sup.1 represents a variety of organic radicals including alkyl which can bear substituents such as hydroxyl, halogen, alkoxy, carbalkoxy, carboxyl, alkylamino, cycloalkyl or aryl, andR.sup.2 and R.sup.3 independently of one another, represent hydrogen or have the same meanings as R.sup.1 or together are a C.sub.4 -C.sub.7 -alkylene chain which is unsubstituted or substituted by one to five C.sub.1 -C.sub.4 -alkyl groups,which comprises:(a) reacting a .gamma.-cyanoketone of the formula ##STR2## where R.sup.1, R.sup.2 and R.sup.3 have the meanings given above, with excess ammonia in a first reaction space on an acidic heterogeneous catalyst at 20.degree.-150.degree. C. and 15-500 bar, and(b) hydrogenating the resulting reaction product in a second separate reaction space in the presence of excess ammonia on a cobalt, nickel or noble metal catalyst at 50.degree.-180.degree. C. and 30-500 bar.Novel pentane-1,5-diamines are obtained, in which R.sup.1 must contain at least two carbon atoms if R.sup.2 and R.sup.3 are both hydrogen. These new compounds containing two primary amine groups possess advantageous properties of lower volatility and also greater asymmetry (with different reactivity of the two amine functions). They provide useful curing agents for epoxides and act as improved components of polyamides.
    • 制备式(I)的戊烷-1,5-二胺的方法,其中R 1表示各种有机基团,包括可以带有取代基的烷基,例如羟基,卤素,烷氧基,烷氧基,羧基,烷基氨基,环烷基或 芳基和R 2和R 3彼此独立地表示氢或具有与R 1相同的含义或一起是未被取代或被一至五个C 1 -C 4 - 烷基取代的C 4 -C 7亚烷基链,其包含:( a)在20-150℃的酸性非均相催化剂的第一反应空间中使具有上述含义的式(Ia)的式(II)的γ-氰基酮与过量的氨反应,其中R1,R2和R3具有上述含义, 15-500巴,(b)在钴,镍或贵金属催化剂的存在下,在50-180℃和30-500巴下,在第二分开的反应空间中,使得到的反应产物氢化。 得到新的戊烷-1,5-二胺,如果R2和R3都是氢,其中R1必须含有至少两个碳原子。 这些含有两个伯胺基团的新化合物具有较低的挥发性和更大的不对称性(两种胺官能团的不同反应性)的有利特性。 它们为环氧化物提供有用的固化剂,并且作为聚酰胺的改进组分。