Azirino-l,5-benzothiazepines

There are three possible azirino-1,5-benzothiazepines. However, those bonded on edges b and c have not been reported to date, and only one paper concerning the synthesis of azirino[2,l-d][l,5]benzothiazepines has appeared. 

As is the case for azirino-1,5-benzothiazepines, for azeto-1,5-benzothia-zepines the only known example concerns the fusion on the d edge of the seven-membered ring. 

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