Treatment of dimedone (5,5-dimethylcyclohexane-1,3-dione) and derivatives with one molar equivalent of sulfuric acid in trifluoroacetic anhydride leads, via sulfonation and a 1,2-methyl group migration, to a variety of dimethylresorcinol derivatives. The reaction has been performed on substrates bearing ester, alkoxy, halo and amino substituents to produce a variety of polysubstituted benzenes. Transient sulfonated intermediates were observed by NMR.
对二美噻(5,5-二
甲基环己烷-1,3-二酮)及其衍
生物与一摩尔当量的
硫酸在
三氟乙酸酐中反应,通过磺化和1,2-甲基基团迁移,可以生成多种二甲基
水杨醇衍
生物。该反应已在带有酯、醚、卤素和
氨基取代基的底物上进行,以生成多种多取代苯。通过核磁共振(NMR)观察到了暂态磺化中间体。