Process for the preparation of halogenated 15-hydroxy-E-homoeburnane compounds

摘要

The invention relates to new, racemic or optically active, halogenated 15-hydroxy-E-homoeburnane derivatives of the general formula (Ia) and/or (Ib), <IMAGE> (Ia) <IMAGE> (Ib) wherin R is a C1-6 alkyl group and X is halogen, and acid addition salts thereof. These compounds are biologically active, furthermore they can be applied as intermediates in the synthesis of other pharmaceutically active substances. The compounds of the general formulae (Ia) and (Ib) are prepared by halogenating the respective racemic or optically active 15-hydroxy-E-homoeburnane derivative of the general formula (II), wherein R is as defined above. <IMAGE> (II)