Fused pyrimidine derivativesFused pyrimidine derivatives R 0515 Synthesis and Biological Activity of Some Benzofuro[3,2-d]pyrimidines. -A variety of the title benzofuropyrimidine derivatives are synthesized and evaluated for their antimicrobial activity. All the compounds obtained show moderate antimicrobial activities. -(BODKE, Y.; SANGAPURE*, S. S.; J. Indian Chem.
Ausgehend vom Carboxamid (I) werden über Benzoylierung (bzw. Acetylierung) und Cyclisierung die Pyrimidine (II) (in alkalischer Lösung) und (III) synthetisiert, wobei (IIa) nach weiterer Benzoylierung ebenfalls (III) ergibt.
Umsetzung des Titelheterocyclus (III) mit den Reagenzien (II), (IV), (VI) bzw. mit Hydrazinhydrat verläuft unter nucleophiler 4‐Substitution zu den Derivaten (I), (V), (VII) bzw. (VIII).
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