Novel Synthesis of 2‐Oxo‐2H‐Benzopyrano[2,3‐d]Pyrimidines
作者： H. Turki , S. Abid , Y. Le Bigot , S. Fery‐Forgues , R. El Gharbi
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摘要: Abstract The synthesis of novel substituted 3‐cyanoiminocoumarins and corresponding N‐ethoxycarbonyl iminocoumarins is described. condensation N‐ethoxycarbonyl‐3‐cyano‐7‐diethylamino iminocoumarin with amines as N‐nucleophiles yields 2‐oxo‐2H‐benzopyrano‐[2,3‐d]pyrimidines having promising optical properties.
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