The diazotization of 3-substituted 2-amino-1H-phenalen-1-ones (substituents=Cl, Br, PhS, or OH) gave 2-diazo-1H-phenalene-1,3(2H)-dione. It is most probable that the reaction involves the intramolecular rearrangement of a transient diazohydroxide intermediate and the consequent elimination of the substituent at the 3-position.
对 3-取代的 2-
氨基-1H-苯
丙烯-1-酮(取代基=Cl、Br、PhS 或 OH)进行重氮化反应,可得到 2-重氮-1H-苯
丙烯-1,3(2H)-二酮。该反应极有可能涉及瞬时重氮氢氧化物中间体的分子内重排,以及随之而来的 3 位取代基的消除。