Synthese von basisch substituierten Thiazolo[3,2- a]thieno[2,3- d]-pyrimidinen.

Addition of Br to the exocyclic double bond of 2-methylene-2.3-dihydro-thiazolo[3.2− a]thieno[2.3− d]pyrimidine-5-ones and-[1]benzothieno[2.3− d]pyrimidine-5-ones, followed by elimation of HBr gave the corresponding 2-bromomethylthiazolo-compounds, which reacted with secondary amines to 2-(dialkylamino-methyl)-thiazolo[3.2− a]-([1]-benzo)-thieno-[2.3− d]pyrimidine-5-ones and their heterocyclic analogues. [ABSTRACT FROM AUTHOR]