Abstract
A facile and convenient synthesis of unsymmetric multisubstituted pyridines from β-ketoesters and ketene N,S-acetals or ketene N,N-acetals has been achieved in good yields catalyzed by Zn(NO3)2·6H2O in the presence of triethylbenzylammonium (TEBA) chloride in ethanol. This reaction was carried out under economical, one-pot reaction conditions (using easily obtained starting materials, and inexpensive catalyst and solvent) and offers considerable improvements over traditional methodology.
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