Synthesis of 5H-pyrido[2,3-a]phenoxazin-5-one and 5H-pyrido[3,2-a]phenoxazin-5-one derivatives |
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| Authors: | Seiko Nan'ya Etur Maekawa Hitoshi Hayakawa Yukio Kitaguchi Yoshio Ueno |
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| Institution: | Seiko Nan'ya,Eturô Maekawa,Hitoshi Hayakawa,Yukio Kitaguchi,Yoshio Ueno |
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| Abstract: | The 5H-pyrido2,3-a]phenoxazin-5-one derivatives and 5H-pyrido3,2-a]phenoxazin-5-one derivatives were prepared by the condensation of substituted 2-aminophenols with 6,7-dibromo-5,8-quinolinequinone followed by dehalogenation in the presence of sodium hydrosulfite dissolved in aqueous pyridine under a nitrogen atmosphere. |
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