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    • 15. 发明授权
    • Process for the preparation of vincaminic acid esters
    • 用于制备长春酸酯的方法
    • US4464534A
    • 1984-08-07
    • US425866
    • 1982-09-28
    • Csaba SzantayLajos SzaboGyorgy KalausJanos KreidlAndras NemesMaria Farkas nee KirjakGyorgy ViskyLaszlo Czibula
    • Csaba SzantayLajos SzaboGyorgy KalausJanos KreidlAndras NemesMaria Farkas nee KirjakGyorgy ViskyLaszlo Czibula
    • C07D461/00C07D455/00
    • C07D461/00
    • The invention relates to a new process for the preparation of apovincaminic acid esters. More particularly, the invention concerns a process for preparing racemic and optionally active vincaminic acid esters of the formula (I) ##STR1## in which R.sup.1 and R.sup.2 independently stand for alkyl having from one to 6 carbon atoms, and 14-epimers thereof.According to the invention an octahydroindolo[2,3-a]quinolizine-oxime ester of the formula (II) ##STR2## in which R.sup.1 and R.sup.2 have the same meaning as defined above, is reacted with an aqueous solution of sulfurous acid or a salt thereof at a temperature of 80.degree. to 110.degree. C. and the 14-epimeric mixture obtained is epimerized or separated in a known manner and if desired, the racemic vincaminic acid esters are resolved.The valuable, pharmaceutically active compounds of the formula (I) can be prepared according to the invention in a considerably improved yield and the undesired side reactions can be suppressed and/or the by-products can easily be converted into other pharmaceutically active materials.
    • 本发明涉及一种用于制备氨磷酸酯的新方法。 更具体地说,本发明涉及一种制备式(I)的外消旋和任选活性的长春胺酸酯的方法,其中R 1和R 2独立代表具有1至6个碳原子的烷基,和14-差向异构体 其中。 根据本发明,其中R 1和R 2具有与上述相同的含义的式(II)的二氢吲哚并[2,3-a]喹嗪肟酯与其中的亚硫酸酯水溶液 酸或其盐,并且所得的14-差向异构体混合物以已知方式进行差向异构化或分离,如果需要,外消旋的长春碱酯被分解。 式(I)的有价值的药物活性化合物可以按照本发明以显着提高的产量制备,并且可以抑制不期望的副反应和/或副产物可以容易地转化成其它药物活性物质。
    • 16. 发明授权
    • Process for the preparation of halovincamone derivatives
    • 制备Halovincone酮衍生物的方法
    • US4356305A
    • 1982-10-26
    • US175384
    • 1980-08-05
    • Csaba SzantayLajos SzaboGyorgy KalausLajos DancsiTibor KeveFerenc Drexler
    • Csaba SzantayLajos SzaboGyorgy KalausLajos DancsiTibor KeveFerenc Drexler
    • A61K31/435A61P9/08C07D461/00
    • C07D461/00
    • The invention relates to new halovincamone derivatives of the general formula (I), ##STR1## wherein R is a C.sub.1-6 alkyl group and X is halogen, and pharmaceutically acceptable acid addition salts and optically active isomers thereof. These compounds possess valuable vasodilating effect, and can be applied to advantage in the therapy.The new compounds defined above are prepared according to the invention so that a single epimer or an epimeric mixture of a racemic or optically active halogenated 14-oxo-15-hydroxy-E-homoeburnane derivative of the general formula (II), ##STR2## wherein R and X are as defined above, or an acid addition salt thereof is treated with an oxidizing agent, and, if desired, the resulting compound of the general formula (I) is converted into its pharmaceutically acceptable acid addition salt and/or resolved.
    • 本发明涉及通式(I)的新的Halovincone酮衍生物,其中R是C 1-6烷基,X是卤素的化合物及其药学上可接受的酸加成盐和旋光异构体。 这些化合物具有有价值的血管扩张作用,可用于治疗中的优势。 根据本发明制备上述新化合物,使得通式(II)的外消旋或光学活性的卤代14-氧代-15-羟基-E-高拜尔班恩衍生物的单个差向异构体或差向异构体混合物 (II)其中R和X如上所定义,或其酸加成盐用氧化剂处理,如果需要,将所得的通式(I)化合物转化为其药学上可接受的酸加成盐和 /或解决。