Chemistry Letters p. 1593 - 1596 (1988)
Update date:2022-08-06
Topics:
Nozoe, Yetsuo
Shindo, Kimio
Ishikawa, Sumio
The benzoxazine and the benzothiazine moieties of cyclohepta<1,4>benzoxazines and their S-analogs were easily exchanged with o-aminobenzenethiol, o-phenylenediamine and other related 1,2-bifunctional reagents in ethanol.The exchange of the two fused heterocycles of a tropylium compound is also described.
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