Pyrazine-1,4-dioxides Fused to Heterocycles; I.: The Positionsselective Synthesis of Pyridopyrazine-1,4-dioxides

Article abstract of DOI:10.1007/BF00903236

The positionsselective synthesis of the title compounds 5 is described and the structure established by reduction of 5c to 8 and synthesis of the latter by an unambiguous method. - Keywords: Heterocyclic compounds; Pyrazin-1,4-dioxides; Pyrido<2,3-b>pyrazin-1,4-dioxides