SYNTHESIS OF FUSED PYRIDINES BY ELECTROCYCLIC RING CLOSURE OF ALDEHYDE NN-DIMETHYLHYDRAZONES

Article abstract of DOI:10.1016/S0040-4039(00)97965-6

3,4-Dihydronaphthalene-2-carboxaldehyde NN-dimethylhydrazones bearing an alkenyl or aryl substituent at the 1-position undergo thermal electrocyclic ring closure followed by the loss of dimethylamine, giving fused pyridines.