Process for the preparation of ergoline derivatives
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.