A Facile Synthesis of New Thieno[2,3‐b][1,4]thiazine Derivatives Starting from 2‐Acylamino‐3,3‐dichloroacrylonitriles.

A new route for the synthesis of 4,5-diamino-6-arylsulfanylpyrimidine derivatives and also purines on their basis

“…(cf, the interaction of H C C C N with benzamidine [21] which leads to the synthesis of imidazole derivatives).…”