Oxadiazolo-l,5-benzothiazepines

Among the possible oxadiazolo-l,5-benzothiazepines, only derivatives containing a 1,2,4-oxadiazole nucleus fused on the d edge of the 1,5-benzothiazepine system are reported. 

The examples reported for this system obviously concern the only possible fusion of a tetrazole nucleus on the d edge of the 1,5-thiazepine ring with a nitrogen bridgehead. 

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