| abstract |
Process for preparing enantiomerically pure imidazo[4,5,1-jk][1,4]benzodiazepin-2(1H^_)-thiones of formula (I), starting from 2,6-dihalo-3-nitrobenzyl derivatives (II) and suitably N^_-protected 1,2-diaminopropanes (III). Novel enantiomerically pure intermediates of formulas (III) and (IV) prepared in the course of the present process. |