CYCLIZATION OF N-ALKYLAZINIUM CATIONS WITH BIFUNCTIONAL NUCLEOPHILES. 10. ISOMERIC THIAZOLOQUINOXALINES IN REACTIONS OF N-METHYLQUINOXALINIUM IONS WITH DITHIOCARBAMATES

Article abstract of DOI:10.1007/BF00514310

The cyclization of N-methylquinoxalinium iodide with ammonium salts of N-alkyl-dithiocarbamic acids in DMSO leads to 4-methyl-2,3,3a,4,9,9a-hexahydrothiazolo<4,5-b>quinoxalines, whereas regioisomeric cycloadducts with a reversed orientation of the thiazol