One-Pot Synthesis of Benzochromene Derivatives Catalyzed by KF-Al2O3 with Grinding
Tong-Shou Jin*, Hong Xie, Yu-Peng Xue and Tong-Shuang Li

College of Chemistry and Environmental Science, Hebei University
Baoding-071002, P.R. China


An efficient and convenient approach to the condensation reaction of naphthol, aromatic aldehydes and malono-nitrile using KF-Al2O3 as catalyst with grinding at room temperature (without any solvent) is described. This method provides several advantages such as neutral condition, simple work-up procedure, high yields and reduced environmental impact.

Benzochromene derivatives, Aromatic aldehydes, Naphthol, Malononitrile, Grinding method.
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  • Asian J. Chem. /
  •  2008 /
  •  20(7) /
  •  pp 5145-5152