INVESTIGATION OF NITROGEN- AND SULFUR-CONTAINING HETEROCYCLES.44. NEW HETEROCYCLIC SYSTEMS. DERIVATIVES OF IMIDAZOLIDINO-PYRIDO- AND IMIDAZOLIDINOPYRIMIDO-1,4-THIAZINES. SYNTHESIS AND STRUCTURE.

Article abstract of DOI:10.1007/BF00522746

New representatives of heterocyclic systems, imidazolidino<3,2-f>-pyrido-<2,3-b> and imidazolidino<3,2-f>pyrimido<4,5-b>-1,4-thiazines, have been obtained.Intermediate compounds of 5N-oxalamides-6-hydroxy-7H-pyrido<2,3-b>-1,4-thiazine have been isolated a