申请人:Schering Aktiengesellschaft
公开号:US04748248A1
公开(公告)日:1988-05-31
A process for preparing an ergoline of the formula ##STR1## wherein C.sub.9 ----C.sub.10 is a CC single or double bond, R.sup.1 is hydrogen or CONR.sub.2, R being hydrogen, methyl, or ethyl, and wherein NR' is in the .alpha.- or .beta.- position, R.sup.2 is lower alkyl of up to 3 carbon atoms, and the salts thereof, comprises treating the corresponding ergolinyl carboxylic acid amide with lead(IV) acetate in an aprotic polar solvent; reacting the intermediarily formed corresponding isocyanate with water or with a reactive amine of up to 4 carbon atoms, (e.g. a mono- or dialkylamine of up to 4-C atoms); and, optionally, treating the resultant product with an acid to form the corresponding salt.
一种制备公式为##STR1##的麦角酸衍生物及其盐的过程,其中C.sub.9-C.sub.10是CC单键或双键,R.sup.1是氢或CONR.sub.2,R为氢、甲基或乙基,NR'位于α或β位,R.sup.2是低碳原子数的烷基,最多有3个碳原子,包括处理相应的麦角酰氨基酸与醋酸铅(IV)在无水极性溶剂中反应;将中间产物形成的异氰酸酯与水或高达4个碳原子的反应性胺(例如高达4个碳原子的单烷基或双烷基胺)反应;并且,可选择性地用酸处理所得产物以形成相应的盐。