Process for the preparation of salts of 4-hydroxystyrene
    2.
    发明授权
    Process for the preparation of salts of 4-hydroxystyrene 失效
    制备4-羟基苯乙烯盐的方法

    公开(公告)号:US5304690A

    公开(公告)日:1994-04-19

    申请号:US80897

    申请日:1993-06-22

    CPC分类号: C07C37/64 C07C68/06

    摘要: 4-Acetoxystyrene is reacted with a base in a solvent to form a salt of 4-hydroxystyrene via saponification. Alternatively, 4-hydroxystyrene is reacted with a base to form a salt of 4-hydroxystyrene. In the latter case, the 4-hydroxystyrene is prepared by the transesterification of 4-acetoxystyrene. Subsequently or simultaneously, the salt of 4-hydroxystyrene is reacted, preferably in situ, with di-tertiary-butyl-dicarbonate to form 4-tertiarybutoxycarbonyloxystyrene.

    摘要翻译: 4-乙酰氧基苯乙烯与溶剂中的碱反应,通过皂化形成4-羟基苯乙烯的盐。 或者,4-羟基苯乙烯与碱反应形成4-羟基苯乙烯的盐。 在后一种情况下,4-羟基苯乙烯通过4-乙酰氧基苯乙烯的酯交换反应来制备。 随后或同时,4-羟基苯乙烯的盐优选原位与二碳酸二叔丁酯反应,形成4-叔丁氧羰基氧基苯乙烯。

    Hydrocarbon-soluble complexes of magnesium alkoxides with magnesium aryl
oxides
    6.
    发明授权
    Hydrocarbon-soluble complexes of magnesium alkoxides with magnesium aryl oxides 失效
    烷氧基镁与镁芳基氧化物的烃溶性络合物

    公开(公告)号:US4885406A

    公开(公告)日:1989-12-05

    申请号:US215121

    申请日:1988-07-05

    IPC分类号: C07C37/64 C07C39/235

    CPC分类号: C07F3/003

    摘要: Hydrocarbon-soluble complexes of magnesium alkoxides with magnesium aryl oxides are described. The magnesium aryl oxide moiety is derived from a hindered aromatic alcohol. The complexes can be formed by reaction between a magnesium alkyl and a mixture of aliphatic alcohols and a hindered aromatic alcohol.

    摘要翻译: 描述了烷氧化镁与镁芳基氧化物的烃溶性络合物。 芳基氧化镁部分衍生自受阻芳族醇。 络合物可以通过烷基镁与脂族醇和受阻芳族醇的混合物之间的反应形成。

    4-phenyl 2-(2{40 -hydroxy-meta-terphenyl-5{40 -yl)-dibenzofuran and 4,4{40 -diphenyl-2,2{40 -bidibenzofuran
    8.
    发明授权
    4-phenyl 2-(2{40 -hydroxy-meta-terphenyl-5{40 -yl)-dibenzofuran and 4,4{40 -diphenyl-2,2{40 -bidibenzofuran 失效
    4-苯基-2-(2- {40-羟基 - 甲基] -5- {40 -YL] - 二苯并呋喃和4,4 {40-二苯基-2,2(40-二苯并呋喃

    公开(公告)号:US3673219A

    公开(公告)日:1972-06-27

    申请号:US3673219D

    申请日:1970-06-23

    申请人: GEN ELECTRIC

    发明人: HAY ALLAN S

    摘要: Heating 3,3'',5,5''-tetraphenyldiphenoquinone above its melting point but below its carbonization temperature causes an intramolecular disproportionation reaction the progress of which is monitored by the color change. Three sexiphenyl compounds are produced which are separable by chromatography. Two of the products are new compounds, having one and two dibenzofuran groups, respectively in their structures. The bidibenzofuran compound can be converted to 5'',5''''-diphenyl-m-quaterphenyl2,2''''''-diol, useful in the preparation of polycarbonates and polyester. The other two products can be reworked to serve as a recycle feedstock.

    摘要翻译: 加热高于其熔点但低于其碳化温度的3,3',5,5'-四苯基联苯醌引起分子内歧化反应,其进展由颜色变化监测。 产生三种通过色谱分离的二苯基化合物。 其中两种产物是新化合物,其结构中分别有一个和两个二苯并呋喃基团。 二苯并呋喃化合物可以转化成可用于制备聚碳酸酯和聚酯的5',5“ - 二苯基 - 间四苯基-2,2” - 二醇。 另外两种产品可以重新加工,作为回收原料。