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6 条记录 (耗时 0.015 秒)

    Hydrophilic, swellable graft copolymers, their preparation and use
    1.
    发明授权
    Hydrophilic, swellable graft copolymers, their preparation and use 失效
    亲水，可溶胀的接枝共聚物，其制备和用途

    公开(公告)号：US5041496A

    公开(公告)日：1991-08-20

    申请号：US495642

    申请日：1990-03-19

    申请人： Friedrich Engelhardt ,  Ulrich Riegel ,  Jurgen Kuhlwein

    发明人： Friedrich Engelhardt ,  Ulrich Riegel ,  Jurgen Kuhlwein

    IPC分类号： A61F13/53 ,  A61L15/60 ,  C08F283/06

    CPC分类号： C08F283/06 ,  A61L15/60

    摘要： The present invention relates to hydrophilic, swellable graft copolymers composed, in random distribution, of 0.5 to 20% by weight of radicals of the general formula I ##STR1## of 79 to 99% by weight of radicals containing an acidic group, of the general formula II ##STR2## and of 0.1 to 2% by weight of radicals of a crosslinking agent which are derived from monomers having at least two olefinically unsaturated double bonds, and the radicals X, Z, m, n, z and also R.sup.1 to R.sup.4 are defined as given in the description, a process for the preparation of these graft copolymers and also their use as absorbents for water and aqueous solutions.

    摘要翻译： 本发明涉及亲水性，可溶胀的接枝共聚物，其以随机分布的形式组合，含有0.5-20％（重量）的通式Ⅰ（I）的基团为79-99％（重量）含酸性基团的基团， 的通式II＆gt;（II）和0.1至2重量％的衍生自具有至少两个烯属不饱和双键的单体的交联剂的基团，基团X，Z，m，n， z和R1至R4的定义如说明书中所述，制备这些接枝共聚物的方法以及它们作为水和水溶液的吸收剂的用途。

    Process for the production of 2-isocyanato-2,3-dehydrocarboxylic acid esters
    6.
    发明授权
    Process for the production of 2-isocyanato-2,3-dehydrocarboxylic acid esters 失效
    2-异氰酸基-2,3-脱氢羧酸酯的制备方法

    公开(公告)号：US4661626A

    公开(公告)日：1987-04-28

    申请号：US837792

    申请日：1986-03-10

    申请人： Franz Effenberger ,  Jurgen Kuhlwein ,  Karlheinz Drauz

    发明人： Franz Effenberger ,  Jurgen Kuhlwein ,  Karlheinz Drauz

    IPC分类号： C07B61/00 ,  B01J23/00 ,  B01J23/36 ,  C07C67/00 ,  C07C241/00 ,  C07C263/14 ,  C07C265/06 ,  C07C313/00 ,  C07C323/57 ,  C07C122/00

    CPC分类号： C07C323/00 ,  C07C265/00

    摘要： There are produced 2-isocyanato-2,3-dehydrocarboxylic acid esters of the general formula: ##STR1## in which R.sup.1 is a straight chain or branched C.sub.1 -C.sub.4 -alkyl group, a phenyl group or a benzyl group, R.sup.2 is hydrogen or a methyl group and R.sup.3 is hydrogen, a straight chain or branched C.sub.1 -C.sub.16 -alkyl group, a C.sub.3 -C.sub.8 -cycloalkyl group, a C.sub.1 -C.sub.6 -alkylmercapto group or a phenyl group by reacting a 2-azido-carboxylic acid ester of the general formula: ##STR2## in an inert solvent at a temperature between 0.degree. and 150.degree. C. with phosgene or diphosgene in the presence of a perrhenate. The compounds of general formula (I) can be converted into the corresponding Z- or BOC-protected 2,3-dehydro-2-amino-carboxylic acid ester with benzyl alcohol or with tert. butyl alcohol, which esters in turn are valuable building blocks for the synthesis of dehydropeptides.

    摘要翻译： 制备通式如下的2-异氰酸基-2,3-脱氢羧酸酯：其中R 1是直链或支链C 1 -C 4 - 烷基，苯基或苄基，R 2 是氢或甲基，R 3是氢，直链或支链C 1 -C 16 - 烷基，C 3 -C 8环烷基，C 1 -C 6烷基巯基或苯基，通过2-叠氮基 - 羧酸 在惰性溶剂中，在0〜150℃的温度下，在高铼酸盐存在下，加入光气或二光气。 通式（I）的化合物可以用苄醇或与叔醇转化为相应的Z-或BOC-保护的2,3-脱氢-2-氨基 - 羧酸酯。 丁醇，这些酯依次是合成脱氢肽的有价值的组成部分。