Regioselective thionation of bicyclic piperazinediones
作者:Stella Soukara、Bernhard Wünsch
DOI:10.1016/s0040-4020(01)00324-6
日期:2001.5
In order to modify and improve the reduction of bicyclicpiperazinediones to yield enantiomerically pure piperazine derivatives the preparation and reduction of the corresponding thiolactams were investigated. With a reduced amount of Lawesson reagent the bicyclicpiperazinediones reacted predominantly at the C-5 carbonyl moiety to provide C-5 monothiolactams.