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Synthesis of some 5 H ‐benzo[ a ]phenoxazin‐5‐one derivatives
Author(s) -
Ueno Yoshio,
Maeda Keiichi,
Koshitani Jinya,
Yoshida Takatoshi
Publication year - 1982
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570190136
Subject(s) - chemistry , potassium hydroxide , pyridine , aqueous solution , medicinal chemistry , sodium hydroxide , condensation , inorganic chemistry , organic chemistry , physics , thermodynamics
The substituted 6‐bromo and 6‐chloro‐5 H ‐benzo[ a ]phenoxazin‐5‐ones, prepared by condensation of substituted 2‐aminophenols with 2,3‐dibromo or 2,3‐dichloro‐1,4‐naphthoquinone in methanolic potassium hydroxide solution, have been dehalogenated to substituted 5 H ‐benzo[ a ]phenoxazin‐5‐ones in the presence of sodium hydrosulfite dissolved in aqueous pyridine under nitrogen atmosphere.