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Review | Special issue | Vol 30, No. 2, 1990, pp.1263-1306
Published online, 1st January, 1970
DOI: 10.3987/REV-89-SR9
Cyclohepta[b][1,4]benzoxazine and Its Related Compounds. Some Novel Aspects in Heterocyclic Chemistry

Tetsuo Nozoe*

*Tokyo Research Laboratories, Kao Corporation, 2-1-3 Bunka, Sumida-ku, Tokyo 131-0044 Japan

Abstract

Chemistry of cyclohepta[b][1,4]benzoxazines and their S- and O-analogues as well as of the related compounds without annulated benzene ring is reviewed. Differing from usual, unreactive heterocycle-annulated tropylium compounds, title compounds are usually very reactive, especially towards 1,4-difunctional nucleophiles such as o-phenylenediamine, ethylenediamine and their S- and O-analogues. Reactivities towards alkali and oxidizing agents are comparatively described in view of the difference of the heteroatoms.