Cyclopropanols, on oxidative ring opening with AgNO3-K2S2O8 in DCM-H2O at room temperature and under open flask conditions, produced beta-keto radicals which were successfully added to quinones to furnish gamma-carbonyl quinones. This mild method has been applied to the synthesis of cytotoxic natural products, 4,6-dimethoxy-2,5-quinodihydrochalcone and evelynin.
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