under the supervision of Assoc. Prof. Emily Parker. He is currently a postdoctoral fellow in the Morris group at the University of Adelaide. His research interests focus on the synthesis of biologically active compounds. Erin Carter obtained her B.Sc. (Hons) degree from Flinders University, Australia, in 2004. She is currently working toward her Ph.D. degree with Dr. Jonathan Morris at the University of Adelaide, where she is carrying out research on the variolins.

N,N-Dialkyl-N′-chlorosulfonylchloroformamidines 1 reacted with 2-aminopyridines 2 to give novel pyrido[1,2-b][1,2,4,6]thiatriazine dioxides 3 and pyrido[2,1-c][1,2,4,6]thiatriazine dioxides 4. Reaction of 1 with 3-aminopyridazines 5 afforded pyridazo[3,2-c][1,2,4,6]thiatriazine dioxides 6 and a pyridazo[2,3-b][1,2,4,6]thiatriazine dioxide 7. The compounds 6 and 7 are derivatives of new ring systems.

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Other 6-membered heterocycles R 0670 N,N-Dialkyl-N'-chlorosulfonyl Chloroformamidines in Heterocyclic Synthesis. Part 3. Pyrido-and Pyridazo-Fused [1,2,4,6]Thiatriazine Dioxides. -The dichloro compounds (I) and (VII) react as 1,3-dielectrophiles with the 2-amino-1-azaheterocycles (II) and (V) to give the title compounds, some of which represent new ring systems. -(CABLEWSKI, T.; CARTER, E. J.; FRANCIS, C. L.; LIEPA*, A. J.; PERKINS, M. V.; Aust.