Helvetica Chimica Acta

Herstellung von Anthrachinonderivaten aus dem DIELS??ALDER??Addukt von 1, 4??Naphtochinon und 5, 5??Dimethoxy??1, 2, 3, 4??tetrachlorcyclopentadien. 2. Mitteilung

P Kniel

Index: Kniel,P. Helvetica Chimica Acta, 1965 , vol. 48, p. 837 - 839

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Citation Number: 2

Abstract

Abstract The D IELS-ALDER adduct of 1, 4-naphthoquinone and 5, 5-dimethoxy-1, 2, 3, 4- tetrachlorocyclopentadiene was transformed into the di-O-acetyl-dienol (80%) which, on oxidation with chromium trioxide, gave 2, 3, 4-trichloranthraquinone-1-carboxylic acid methylester (72%). Sodium dithionite treatment of this compound yielded 2, 3- dichloroanthraquinone-1-carboxylic acid (80%). Pyrolysis of the D IELS-A LDER adduct ...