Abstract
Some new derivatives of 3,5‐diaryl‐4‐imino‐5,7,8,9‐tetrahydro‐3H‐chromeno[2,3‐d]pyrimidine have been prepared through a condensation reaction of 2‐amino‐4‐aryl‐3‐cyano‐5,6,7,8‐tetrahydrobenzo[b]pyrans with triethyl orthoformate in boiling acetic anhydride followed by cyclization with primary aryl amines in the presence of a few drops triethylamine as catalyst in refluxing ethanol. The products were characterized on the basis of IR, 1H‐NMR, and 13C‐NMR spectral and microanalytical data.
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