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Digitale Medien

Untersuchungen zurFriesschen Verschiebung von Estern derortho- undpara-Methoxybenzoesäure (1979)

Martin, Robert ; Gros, Nicole ; Böhmer, Volker ; [weitere]

Springer

Monatshefte für Chemie 110 (1979), S. 1057-1066

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Details

ISSN: 1434-4475

Schlagwort(e): Fries rearrangement ; of methoxybenzoates ; 2- or 4-Hydroxy-4′-methoxy-benzophenones ; TiCl4 ; catalytic action of

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Abstract TheFries rearrangement of different methoxy benzoates has been investigated. Frompara-methoxy benzoates the corresponding hydroxy-4′-methoxy benzophenones could be obtained in good yields by treatment withLewis acids (especially TiCl4) in nitromethane at 20°C (4-hydroxy derivatives) or without solvent at 120°C (2-hydroxy derivatives). Under the same conditions only demethylation occurs withortho-methoxy benzoates leading to the corresponding salicylates. Small amounts of hydroxy-2′-methoxy benzophenones were obtained by treatment with polyphosphoric acid.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00910953

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