| 摘要 |
The novel compounds of the formula I <IMAGE> in which R represents a group which is stable in a reductive amination, and in which the hydroxyl group is present in activated or replaced form, in racemic or optically active form, are intermediates for the preparation of useful medicaments having a beta -adreno-receptor- blocking action. They are obtained by activation or replacement of the free hydroxyl group in the corresponding compounds of the formula I, in which the hydroxyl group is present in free form.
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