Synthesis of New Biheterocycles by a One-Pot Sonogashira Coupling Reaction
摘要:
Halogenated flavones, isoflavones and indoles were subjected to a one-pot Sonogashira coupling reaction to generate a series of new biheterocyclic compounds. The methodology can be readily adapted to the synthesis of a wide variety of substituted biheterocycles.
Synthesis of New Biheterocycles by a One-Pot Sonogashira Coupling Reaction
摘要:
Halogenated flavones, isoflavones and indoles were subjected to a one-pot Sonogashira coupling reaction to generate a series of new biheterocyclic compounds. The methodology can be readily adapted to the synthesis of a wide variety of substituted biheterocycles.
Kudzuisoflavone-A was successfully synthesised via oxidativedimerisation of daidzein in the presence of cuprous chloride. Appropriately substituted isoflavones also undergo regioselective oxidativedimerisation when treated with thallium trifluoroacetate to give novel 6′,6′″-biisoflavones in good yield. A rationale for the regioselectivity is proposed.