1985
DOI: 10.1002/cber.19851181136
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Synthese von 2‐Methyl‐4 H ‐1,3‐benzoxazin‐4‐onen und analogen Verbindungen

Abstract: Synthesis of 2-Methyl-4H-1,3-benzoxazin-4-ones and Related Compounds4H-1,3-benzoxazin-4-ones 2 are smoothly prepared uia (acy1imino)phosphoranes 1 by intramolecular condensation analogous to a Wittig reaction. Tert. phosphanes are used for the preparation of the (acy1imino)phosphoranes 1 which are converted into the corresponding benzoxazines and tert. phosphane oxides, e. g. 2-methyl-4H-l,3-benzoxazin-4-one (2a) which, in spite of some attempts, has not been obtained before.Der Benzoxazin-4-on-Heterocyclus wu… Show more

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Cited by 13 publications
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