86428-01-5Relevant articles and documents
FORMATIONS OF 1,1'-BIAZAAZULANONES THROUGH, -TYPE CYCLOADDITION REACTIONS OF TROPONE AZINE WITH HETEROCUMULENES
Ito, Kazuaki,Saito, Katsuhiro,Takahashi, Kensuke
, p. 2339 - 2348 (2007/10/02)
Reaction of N-aryl-2,4,6-cycloheptatrien-1-imine with hydrazine afforded tropone azine, which reacted with chloroketenes to give 1,1'-biazaazulanones via -type cycloadducts followed by elimination of hydrochloride.The similar reaction using phenyl isocyanate afforded a -type 1:2 cycloadduct, while the reaction with phenyl isocyanate yielded only a 1:1 cycloadduct. 15N and 13C nmr spectra on C=N bond of tropone azine showed a minor contribution of a dipolar structure compared with the case of N-aryl-2,4,6-cycloheptatrien-1-imines.