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    • 52. 发明授权
    • Preparation of 3-arylacrylic acids and their derivatives
    • 3-芳基丙烯酸及其衍生物的制备
    • US5359122A
    • 1994-10-25
    • US193872
    • 1994-02-08
    • Michael HuellmannJosef GnadRainer Becker
    • Michael HuellmannJosef GnadRainer Becker
    • C07C57/44C07C59/64C07C67/46C07C69/734
    • C07C59/64C07C57/44C07C67/46
    • The preparation of 3-arylacrylic acids and their derivatives I ##STR1## where Ar is aryl which can additionally have substituents which do not react with ketene and are stable under the conditions of the reaction described below, andR.sup.1 is hydrogen, an alkali metal, an alkaline earth metal, ammonium or C.sub.1 -C.sub.20 -alkyl,comprises a first stage in which a dialkyl acetal of an aromatic aldehyde of the formula II ##STR2## where R.sup.2 is C.sub.1 -C.sub.4 -alkyl, is reacted with ketene of the formula CH.sub.2 .dbd.C.dbd.O in the presence of catalytic amounts of a protic or Lewis acid to give a 3-arylpropionic acid derivative of the formula III ##STR3## and a second stage in which this intermediate III is reacted in the presence of acid or base and, in the case where R.sup.1 is C.sub.1 -C.sub.20 -alkyl, additionally with a C.sub.1 -C.sub.20 -alkanol to give the final product I.
    • 3-芳基丙烯酸及其衍生物的制备I(I)其中Ar是可以另外具有不与乙烯酮反应并且在下述反应条件下稳定的取代基的芳基,R 1是氢, 碱金属,碱土金属,铵或C 1 -C 20烷基,包括其中R 2为C 1 -C 4 - 烷基的式II的芳族醛的二烷基缩醛反应的第一阶段 在催化量的质子或路易斯酸存在下,式CH 2 = C = O的烯酮,得到式III的3-芳基丙酸衍生物(III),其中该中间体III为 在酸或碱的存在下反应,在R1为C1-C20烷基的情况下,另外加入C1-C20链烷醇,得到最终产物I.
    • 53. 发明授权
    • Preparation of haloalcohols
    • 卤代醇的制备
    • US5237113A
    • 1993-08-17
    • US973553
    • 1992-11-09
    • Rainer BeckerWolfgang MackenrothWalter Seufert
    • Rainer BeckerWolfgang MackenrothWalter Seufert
    • C07C29/62
    • C07C29/62
    • Haloalcohols of the general formula IHal--X--OH (I)where X is straight-chain or branched, substituted or unsubstituted alkylene of 4 or more carbon atoms in the chain, which may be interrupted by one or more heteroatoms, and Hal is halogen, are prepared by reacting a diol of the general formula IIHO--X--OH (II)where X has the above meanings, with an aqueous hydrogen halide solution in a water-immiscible organic solvent which is inert under the reaction conditions, at from 50.degree. to 150.degree. C., using an excess of hydrogen halide, based on the diol of the general formula II, of from 10 to 200 mole percent and setting a volume ratio of inorganic phase: organic phase of from 1:2 to 1:50.
    • 通式I Hal-X-OH(I)的卤代醇,其中X是链中4个或更多个碳原子的直链或支链,取代或未取代的亚烷基,其可被一个或多个杂原子间隔,Hal是 卤素,通过使具有上述含义的通式II HO-X-OH(II)的二醇与卤化氢水溶液在反应条件下为惰性的水不混溶的有机溶剂中,在 从50℃至150℃,使用过量的基于通式II的二醇的卤化氢为10至200摩尔%,并将无机相:有机相的体积比为1:2设定为 1:50。
    • 60. 发明授权
    • Preparation of polytetrahydrofuran
    • 聚四氢呋喃的制备
    • US5641857A
    • 1997-06-24
    • US545753
    • 1995-11-07
    • Roman DostalekRolf FischerUlrich MuellerRainer Becker
    • Roman DostalekRolf FischerUlrich MuellerRainer Becker
    • C08G63/668C08G65/16C08G65/20C08G65/26C08G63/82C08G63/66
    • C08G65/20C08G63/668C08G65/2657
    • Polytetrahydrofuran or polytetrahydrofuran monoesters of C.sub.1 -C.sub.20 -monocarboxylic acids or polytetrahydrofuran monoethers of monohydric C.sub.1 -C.sub.20 -alcohols, having an average molecular weight of from 250 to 10,000 Dalton and liquid at room temperature, are prepared by the cationic polymerization of tetrahydrofuran in the presence of a telogen by a process in which tetrahydrofuran is polymerized in the presence of water, 1,4-butanediol and/or polytetrahydrofuran having an average molecular weight of from 200 to 700 Dalton and/or of a C.sub.1 -C.sub.20 -monocarboxylic acid and/or of a monohydric C.sub.1 -C.sub.20 -alcohol with the aid of a catalytic amount of a zeolite catalyst which has an SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of from 4:1 to 100:1 and in which the population ratio P of the acid centers on the external surface of the zeolite to the total number of acid centers of the zeolite is 0.03/l or more.
    • PCT No.PCT / EP94 / 01403 Sec。 371日期:1995年11月7日 102(e)日期1995年11月7日PCT 1994年5月3日PCT公布。 WO92 / 26803 PCT出版物 日期1994年11月24日通过阳离子聚合制备平均分子量为250〜10,000道尔顿且在室温下为液体的C1-C20-一元羧酸或一元一-C 1 -C 20醇的聚四氢呋喃或聚四氢呋喃单酯 的四氢呋喃在四氢呋喃存在下,通过其中四氢呋喃在水存在下聚合的方法,1,4-丁二醇和/或平均分子量为200-700道尔顿的聚四氢呋喃和/或C1-C20 - 一元羧酸和/或一元醇C 1 -C 20醇,借助于催化量的SiO 2 / Al 2 O 3摩尔比为4:1至100:1的沸石催化剂,其中总体比P为 沸石外表面的酸中心与沸石的酸中心总数为0.03 / l以上。