Synthese von Thiazolo[3,2−a]thieno[2,3−d]pyrimidin-Derivaten

Derivatives of 5H-thiazolo3.2?a]thieno2.3?d]pyrimidine(A), 5H-1]benzothieno2.3?d]thiazolo3.2?a]pyrimidine (B), 4H-thiazolo3.2?a]thieno3.2?e]pyrimidine (C) and 5H-1]benzo-thieno3.2?e]thiazolo3.2?a]pyrimidine (D) were synthesized by various methods. Similar reactions are leading to derivatives of thieno2′.3′∶4.5]pyrimido2.1?b]1.3]thiazine (E) and 1]benzothieno2′.3′∶4.5]pyrimido2.1?b]1.3]thiazine (F).C, D, E, andF are new heterocyclic ring systems. Detailed papers will appear soon.