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An efficient and straightforward method for the synthesis of benzochromenodiazocines and chromenopyridines via the catalyst-free, three-component condensation of 3-formylchromones, amines and isatoic anhydride or a dialkyl acetylenedicarboxylate is reported.
The synthesis of 2-amino-4-cyano-4H-chromene derivatives as new HA 14-1 analogues by a simple and efficient method is reported. In addition, the reaction of 2-amino-2H-chromene-3-carbonitriles, salicylaldehydes and amines results in the formation of new chromeno[2,3-d]pyrimidine derivatives.
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