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Communication | Regular issue | Vol 43, No. 8, 1996, pp.1601-1604
Published online, 1st January, 1970
DOI: 10.3987/COM-96-7500
Preparation of p-Benzoquinono[b]oxepines and Their Aromatic Ring Annulated Derivatives

Naoki Kakusawa, Kiyohiro Inui, Jyoji Kurita, and Takashi Tsuchiya*

*School of Pharmacy, Hokuriku University, 3-Ho, Kanagawa machi, Kanazawa 920-1181, Japan


Reaction of pyridazine N-oxides with 2,3-didehydrobenzoquinone resulted in the formation of the novel p-benzoquinono[b]oxepines, from which their aromatic ring annulated derivatives such as naphthoquinono-, anthraquinono-, 1-azanaphthoquinini-oxepines were prepared by Diels-Alder reactions.