申请人:SCHERING AKTIENGESELLSCHAFT
公开号:EP0074921A1
公开(公告)日:1983-03-23
A process for preparing an ergoline of the formula
wherein
Cs = C10 is a CC single or double bond,
R' is a hydrogen or CONR2, R being hydrogen, methyl, or ethyl, and wherein NR' is in the a- or β-position,
R2 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.
一种制备式中Cs=C10为CC单键或双键,R'为氢或CONR2,R为氢、甲基或乙基,其中NR'位于a位或β位,R2为不超过3个碳原子的低级烷基的麦角啉及其盐的工艺,包括在非沸腾极性溶剂中用乙酸铅(IV)处理相应的麦角啉基羧酸酰胺;将中间形成的相应异氰酸酯与水或不超过4个碳原子的活性胺(例如不超过4-C原子的单烷基胺或二烷基胺)反应;以及任选地,用酸处理所得产物以形成相应的盐。