Tridesoxypyranosides and process for their manufacture
    32.
    发明授权
    Tridesoxypyranosides and process for their manufacture 失效
    三羟甲基纤维素及其制备方法

    公开(公告)号:US3639388A

    公开(公告)日:1972-02-01

    申请号:US3639388D

    申请日:1969-04-02

    Applicant: HOECHST AG

    CPC classification number: A61K31/70

    Abstract: 2'',3'',4''-TRIDESOXYPYRANOSIDES OF THE FORMULA

    3-(6-(HO-),6-R5-TETRAHYDROPYRAN-2-YL),5-R1,12-R3,14-(HO-),

    16-R4,17-(2-(O=)-2,5-DIHYDROFURAN-4-YL),19-R2-ANDROSTANE

    WHEREIN R1, R2, AND R4 ARE EACH HYDROGEN OR HYDROXY AND R5 IS LOWER ALKYL. THE METHOD OF MAKING THE SAME BY REACTION OF LIA1H4 WITH A CORRESPONDING 2''-ALKYL-2''CARBOALKOXYTETRAHYDROPYRANYL ETHER HAVING A METHYL, HYDROXYMETHYLENE, OR FORMYL GROUP IN THE 10-POSITION.

    Process for the manufacture of (androst-17{62 -y1)-{60 -pyrones
    33.
    发明授权
    Process for the manufacture of (androst-17{62 -y1)-{60 -pyrones 失效
    (ANDROST-17 {62-Y1) - {60-吡喃酮的制备方法

    公开(公告)号:US3621015A

    公开(公告)日:1971-11-16

    申请号:US3621015D

    申请日:1969-02-03

    Applicant: HOECHST AG

    CPC classification number: C07J17/00 C07J19/00

    Abstract: The method of making androst-(17 Beta - Alpha y1)- Alpha pyrones having inotropic, cardiovascular, and diuretic activity by Wittig reaction of a 20-keto-21-acetal pregnene with a methyltriphenyl-phosphonium halide to form the corresponding 20methylene compound, hydrolysis of the 21-acetal group, Michael addition of a malonic acid ester to the 20-methylene unsaturation, hydrolysis of the di-ester formed to the free diacid, decarboxylation of one carboxy group, cyclization to a 17enol- Alpha -lactone with a carboxylic acid anhydride, and dehydrogenation to the corresponding Alpha -pyrone; 3- Beta hydroxy-21-oxo-23-carbomethoxy- Delta 5-cholenic acid; 3 Beta hydroxy-21-oxo-23-carboxy- Delta 5-cholenic acid; and 3 Beta hydroxy-21-oxo- Delta 5-cholenic acid, obtained as intermediates in such a method.

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