Process for the preparation of 4-amino-androstenedione derivatives
申请人:Farmitalia Carlo Erba S.r.l.
公开号:US04865766A1
公开(公告)日:1989-09-12
A process for the preparation of 4-aminoandrostenediones of formula (I) ##STR1## and pharmaceutically acceptable salts thereof, wherein one of R.sub.1 and R.sub.2 is hydrogen and the other is hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.2 -C.sub.6 alkenyl or C.sub.2 -C.sub.6 alkynyl, and the symbol indicates that each of (x) and (y), independently, is a single bond or a double bond, comprising reacting a compound of formula (II) ##STR2## wherein E is a halogen atom and R.sub.1, R.sub.2, (x) and (y) each are as defined as above with ammonia.
Using androstenedione as the starting material, we have synthesised 11 novel 4-chloro-16-(E)-benzylidene androst-1,4-diene-3,17-dione derivatives. All the final products are novel and were identified by 1H NMR, 13C NMR and HRMS spectrometry.