obtained from tetracyanoethylene, ethyl vinyl ether, and ethanol, yielded 2-aminopyridine derivative 2 fused with cyclopentane in one pot in the presence of pyridine. On the basis of several experiments, the proposed mechanisminvolves the Michael reaction of 1 with the diene generated by the elimination of hydrogen cyanide and ethanol from 1, followed by double intramolecular nucleophilic additions to the