Bulletin of the Chemical Society of Japan p. 812 - 816 (1992)
Update date:2022-07-30
Topics:
Ito, Kazuaki
Saito, Katsuhiro
Takahashi, Kensuke
Simple heating of mixtures of N-arylcycloheptatriene-1-imines and acyl chlorides in the presence of an excess amount of triethylamine afforded 1-azaazulen-2(1H)-ones in high yields.The intermediacy of the <8+2> cycloadducts between the 2,4,6-cycloheptatriene-1-imines and ketenes were confirmed by their isolations.Analogous results were obtained with tropone hydrazones.
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