Optically active beta-aminoalkoxyborane complex
    6.
    发明授权
    Optically active beta-aminoalkoxyborane complex 失效
    光学活性β-氨基烷氧基硼烷络合物

    公开(公告)号:US5808098A

    公开(公告)日:1998-09-15

    申请号:US848169

    申请日:1997-04-29

    摘要: 1. An optically active .beta.-aminoalkoxyborane complex of the formula (I): ##STR1## wherein R.sup.1 is C.sub.1 -C.sub.8 alkyl, C.sub.3 -C.sub.7 cycloalkyl, C.sub.7 -C.sub.11 aralkyl or C.sub.6 -C.sub.10 aryl, R.sup.2 is hydrogen, C.sub.1 -C.sub.8 alkyl, C.sub.3 -C.sub.7 cycloalkyl or C.sub.7 -C.sub.11 aralkyl, or R.sub.1 and R.sup.2 together form (CH.sub.2).sub.n wherein n is 3 or 4, and Ar is naphthyl, anthryl or phenanthryl, which may be substituted by from 1 to 3 substituents selected from the group consisting of halogen, nitro, C.sub.1 -C.sub.6 alkyl, C.sub.3 -C.sub.7 cycloalkyl, C.sub.2 -C.sub.6 alkenyl, C.sub.2 -C.sub.6 alkynyl, C.sub.7 -C.sub.11 aralkyl, C.sub.6 -C.sub.10 aryl, C.sub.1 -C.sub.6 alkoxy and styrene polymer substituents.

    摘要翻译: 1.式(I)的光学活性β-氨基烷氧基硼烷络合物:其中R 1是C 1 -C 8烷基,C 3 -C 7环烷基,C 7 -C 11芳烷基或C 6 -C 10芳基,R 2是氢,C 1 -C 8烷基,C 3 -C 7环烷基或C 7 -C 11芳烷基,或者R 1和R 2一起形成(CH 2)n,其中n为3或4,Ar为萘基,蒽基或菲基,其可被1至3个取代基取代 选自卤素,硝基,C 1 -C 6烷基,C 3 -C 7环烷基,C 2 -C 6烯基,C 2 -C 6炔基,C 7 -C 11芳烷基,C 6 -C 10芳基,C 1 -C 6烷氧基和苯乙烯聚合物取代基。

    Process for the preparation of diacerein
    7.
    发明授权
    Process for the preparation of diacerein 失效
    制备双醋瑞因的方法

    公开(公告)号:US5670695A

    公开(公告)日:1997-09-23

    申请号:US376722

    申请日:1995-01-23

    申请人: Guido Di Napoli

    发明人: Guido Di Napoli

    CPC分类号: C07C67/293 C07C2103/24

    摘要: The present invention relates to a process for the preparation of 1,8-diacetoxy-3-carboxyanthraquinone, also known as diacerein, via aloin acetylation, oxidation of the acetylated product, and purification of the raw diacerein obtained by means of crystallization from 2-methoxyethanol or N,N-dimethylacetamide and optionally by dissolution of the corresponding salt with triethylamine in methylene chloride, followed by removal of the insoluble residue.

    摘要翻译: 本发明涉及通过芦荟乙酰化,乙酰化产物的氧化,以及通过2-甲基-2-吡咯烷酮的结晶得到的生成的双醋瑞因的纯化制备1,8-二乙酰氧基-3-羧基蒽醌(也称为双醋瑞因)的方法, 甲氧基乙醇或N,N-二甲基乙酰胺,任选地通过将相应的盐与三乙胺在二氯甲烷中溶解,然后除去不溶性残余物。