Ring Contraction of Some Diakylamino-and Methoxy-substituted 1,2-and 1,4BenzoquinonesThe dialkylamino and methoxy-substituted 1,2 and 1,4-benzoquinones la, b, 4, 6, and 8 react with sodium metaperiodate in methanol/water to give the ring-contracted products 3a, b, 5, 7, and 9. Compound 3b is also obtained by the reaction of l b with 3-chloroperoxybenzoic acid.Im Rahmen unserer Untersuchungen zur Reaktivitat von Bis(dialky1amino)benzochinonen'J1 berichten wir iiber die Umsetzungen einiger bis(dialky1amino)-und methoxysubstituierter 1,2-und 1,4-Benzochinone mit Natriumperiodat und 3-Chlorperoxybenzoesaure.Durch Umsetzung des Diamino-1,2-benzochinons 1 a mit einem OberschuB an Natriumperiodat in Methanol/Wasser wird in 63% Ausbeute eine orangefarbene Verbindung er-
Die Umsetzung von 3,6‐Dialkylbrenzcatechinen (I) mit Piperidin oder Morpholin (II) in Gegenwart von Kupfer(II)‐nitrat und Luft führt zu den 4,5‐Bisamino‐o‐benzochinonen (III).
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