CYCLIZATION OF N-ALKYLAZINIUM CATIONS WITH BIFUNCTIONAL NUCLEOPHILES. 14. REACTION OF QUINOXALINIUM SALTS WITH MONO- AND N,N'-DISUBSTITUTED AMIDINES

Article abstract of DOI:10.1007/BF00506676

Monosubstituted benzamidines undergo cyclization with quinoxalinum salts to give 1,2-disubstituted 3a,4,9,9a-tetrahydroimidazo<4,5-b>quinoxalines.The participation in similar cyclizations of N,N'-disubstituted amidines with a CH-active group in the α posi