A convenient synthesis of 2-amino-3-cyano-4-aryl-1,4,5,6-tetrahydrobenzo[h]chromenes derivatives using KF-Al2O3 as catalyst

Abstract A series of new 2‐amino‐3‐cyano‐4‐aryl‐1,4,5,6‐tetrahydrobenzo[h]chromenes derivatives were synthesized by the reaction of malononitrile with 2‐arylmethylidene‐3, 4‐dihydro‐1(2H)‐naphthalenone in N,N‐dimethylformamide (DMF) at 80°C catalyzed by KF‐Al2O3. The structure of the product was confirmed by x‐ray analysis.