D. Muceniece et al., NEW AMINOCYCLOHEXADIENE ISOMER FROM HANTZSCH PYRIDINE SYNTHESIS, Bulletin des Societes chimiques belges, 106(7-8), 1997, pp. 467-474
1-Aminocyclohexa-1,3-diene derivatives (4) under bar and <(14)under ba
r> were obtained by the reaction of N-methyl aminocrotonanilides (2) u
nder bar with ethyl benzylidene acetoacetate or benzylidene acetoaceto
ne under Hantzsch pyridine synthesis conditio ns. Other products of ca
rbocyclization - cyclohexenones (5) under bar, (6) under bar and hydro
xycyclohexanone (7) under bar were also isolated from the same reactio
n.